Malicious PDF — malware analysis report

Static analysis result for SHA-256 18aaf28aafeffb25…

MALICIOUS

PDF

343.6 KB Created: 2022-03-13 21:13:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-10
MD5: a0113d07039eac7d912f6e84614cf5ff SHA-1: de220a3bd569e0762c6d854d06411658d999143f SHA-256: 18aaf28aafeffb2598f44d1f476de59c428976782514ff770679752136bcabef
211 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6817

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • PDF advertises pirated movie streaming/download medium PDF_PIRACY_STREAMING_LURE
    PDF rendered text advertises free full-movie streaming or download using piracy-brand names or a 'full movie + download/free/watch' intent phrase — recovered after folding the styled Unicode confusables the campaign uses to hide those keywords from plain-text detection. These are disposable SEO-spam carriers that route users to malvertising, fake-player, and scam pages; the PDF itself is inert.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://robertbah.si/files/file/noxijokedi.pdf In PDF document text
    • http://www.kedokteran.untan.ac.id/asset/ckeditor/plugins/kcfinder/upload/files/89144792898.pdfIn PDF document text
    • https://hightechrustremovers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/162004250721c1---kisoxiguvafonuzitomema.pdfIn PDF document text
    • https://www.anoregmt.org.br/ckeditor/ckfinder/userfiles/files/60381333210.pdfIn PDF document text
    • http://winfielddeli.com/ckfinder/userfiles/files/80413125154.pdfIn PDF document text
    • http://eigo-manabo.com/app/webroot/js/kcfinder/upload/files/7509820070.pdfIn PDF document text
    • http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/161f9b136797b9---77338982212.pdfIn PDF document text
    • http://markalikonut.com/UserFiles/file/maponebimewu.pdfIn PDF document text
    • http://www.mab-solutions.fr/upload/file/mowubenasomebuwovunazibo.pdfIn PDF document text
    • http://proreferee.ru/uploads/ckfinder/files/pobomiladorebufanaxaju.pdfIn PDF document text
    • https://clove7.com/userfiles/file/nibifefeze.pdfIn PDF document text
    • http://sinojjacob.com/userfiles/file/426369132.pdfIn PDF document text
    • https://avantkart.com/wp-content/plugins/super-forms/uploads/php/files/aru91rq19rdikjapf77o18l2k4/lesusexapotetivug.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/1621f1d2290fb1---danuselefuwixivezolebi.pdfIn PDF document text
    • http://siamsnail.com/media/userfiles/files/20359062105.pdfIn PDF document text
    • http://fcgo.tw/uploadpic/files/xapofek.pdfIn PDF document text
    • https://tanasiri.com/piceditor/file/lonida.pdfIn PDF document text
    • https://rireenfrance.com/images/upload/files/dijevebofipemasonev.pdfIn PDF document text
    • http://mousike.it/img_ins/files/81103268061.pdfIn PDF document text
    • http://www.debreceni-fogaszat.hu/js/ckeditor/kcfinder/upload/files/muxelomukirajenu.pdfIn PDF document text
    • https://twojeloty.pl/admin/kcfinder/upload/files/rizelipon.pdfIn PDF document text
    • http://viabowlingproducts.com/userfiles/file/nederolikefevubi.pdfIn PDF document text
    • https://ezgoe.com/10005001208290177/ckfinder/userfiles/files/toriz.pdfIn PDF document text
    • https://www.afsti.org/admin/kcfinder/upload/files/mavefaniwigobogadanu.pdfIn PDF document text
    • https://cplastik.cz/data/cms/file/20506597323.pdfIn PDF document text
    • https://kapokcmassage.com/uploads/files/202202160622574175.pdfIn PDF document text
    • http://asiavent.com/UserFiles/file///24774551865.pdfIn PDF document text
    • http://karcannakliyat.com/userfiles/file/71027726175.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/21fc7c5bac269f3d2c101920948f30a7/tutowozaloteke.pdfIn PDF document text
    • https://fenix-arm.ru/kcfinder/upload/files/38750984615.pdfIn PDF document text
    • https://inflexi.com/kcfinder/upload/files/jumox.pdfIn PDF document text
    • http://bazoolwddd.specialty-match.com/upload/files/88068496576.pdfIn PDF document text
    • https://melnikhouse.com/userfiles/file/91820617736.pdfIn PDF document text
    • http://www.premiumimport.nl/ckfinder/userfiles/files/biwarovuzepar.pdfIn PDF document text
    • http://cctsw.net/whly/up_files/FCK/file/20220221_102632_115.pdfIn PDF document text
    • https://mvfht.ca/kcfinder/upload/files/44611084201.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/162277a62175eb---lufelenugudojanupus.pdfIn PDF document text
    • https://cooperspick.com/files/pifopodabisisobo.pdfIn PDF document text
    • https://rqconsultores.com/userfiles/file/demewusexawemelopuline.pdfIn PDF document text
    • http://www.malagatour.es/ckfinder/userfiles/files/93281109542.pdfIn PDF document text
    • http://werkkledingverkoop.nl/images/docman/files/68830916939.pdfIn PDF document text
    • https://lovig.co.za/XSRYdR1H?utm_term=dls+19+profile.+dat+hackPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn extracted file (font_00_sfnt_off0004e56a.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0004e56a.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004e56a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4E56A 10992 bytes
SHA-256: 3742b4578d88bf9f10e82aa909a856d0d943c00f923e32523d79f2144baed404
font_01_sfnt_off0004ff28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FF28 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9
font_02_sfnt_off00051643.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51643 20916 bytes
SHA-256: c0cca63417c4c0974e7f05ab33fa97d0ba372ec0521a92ba29c0aba75196c355