Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9cf83c6599f0e86…

MALICIOUS

PDF

367.5 KB Created: 2022-02-02 22:57:54 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-04-27
MD5: 81e10decc1e6bec0a735212eb776ccb9 SHA-1: 7c82d433197e6f0e13df3298a5f01f211930f954 SHA-256: a9cf83c6599f0e86c6e5329b8b3bddd38c921e92892c43be7714b795c88ee95a
246 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.6197

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
  • Travel-support phone-number stuffing scam critical SE_TRAVEL_SUPPORT_PHONE_SCAM
    Document repeats phone numbers in airline/travel/refund/support language, often across multiple regional phrasings. This matches SEO/support-scam PDFs that impersonate airlines or travel brands and route users to attacker-controlled call centers rather than a normal travel document.
  • 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.
  • 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://lazav.co.za/XSRYdR1H?utm_term=safety+incident+reporting+training PDF link annotation
    • http://bnrware.com/uploadfile/fckeditor/file/81419142926.pdfIn PDF document text
    • http://nanouklid.cz/upload/file/fofixegopanuvarugofif.pdfIn PDF document text
    • http://tdbm.vn/upload/files/65033127900.pdfIn PDF document text
    • http://www.performhabitat.fr/bundles/astadmin/js/ckfinder/userfiles/files/87623211133.pdfIn PDF document text
    • http://ctyrkolky-gamax.cz/data/dokumenty/jesopivuxikure.pdfIn PDF document text
    • https://sangogiaphuc.com/admin/webroot/upload/image/files/fuvijugebupajizi.pdfIn PDF document text
    • https://netiko.ge/img/Data/file/zubelixapam.pdfIn PDF document text
    • https://catbasailing.com/upload/fck/file/lasibimajesovom.pdfIn PDF document text
    • http://biomehl.com/images/content/files/93251431724.pdfIn PDF document text
    • https://delphin-restaurant.com/ckfinder/upload/files/gejozowedutakozotogok.pdfIn PDF document text
    • http://knshzj.com/CKEdit/upload/files/9202470301.pdfIn PDF document text
    • http://restauraceeverest.cz/userfiles/file/xivopalijoj.pdfIn PDF document text
    • http://www.iqubz.com/wp-content/plugins/formcraft/file-upload/server/content/files/161b60f5b3f048---45573722974.pdfIn PDF document text
    • https://acv-verdun.fr/kcfinder/upload/files/65863651716.pdfIn PDF document text
    • https://weboonline.com/ckfinder/userfiles/files/27268579462.pdfIn PDF document text
    • http://xn--e1aaafipco3bk8gra3b.xn--p1ai/upload_picture/file/juvin.pdfIn PDF document text
    • https://rt-totaalafbouw.nl/userfiles/file/96034811991.pdfIn PDF document text
    • http://centralcogtc.com/uploads/file/farorudesu.pdfIn PDF document text
    • http://redemaisfarma.com/userfiles/file/98824968010.pdfIn PDF document text
    • http://macierz-grodziec.org/files/file/6604320584.pdfIn PDF document text
    • https://capecoralliving.com/media/file/32614030245.pdfIn PDF document text
    • http://ziraddin.ru/kcfinder/upload/files/54825348083.pdfIn PDF document text
    • http://thingsantiquesla.com/userfiles/files/73094787172.pdfIn PDF document text
    • http://www.ebsjosepirosamaria.com/wp-content/plugins/formcraft/file-upload/server/content/files/161792da9314a6---52301775939.pdfIn PDF document text
    • http://dinobajka.pl/Upload/file/pugawe.pdfIn PDF document text
    • http://dc-a436c1f93717.abmextranet.com/fckimages/file/53897310345.pdfIn PDF document text
    • http://tumakuruvoice.com/tumkurvoice/ckeditor/ckfinder/userfiles/files/zipavojaneledaxifenuvuwun.pdfIn PDF document text
    • http://malifer.hu/upload/file/xasimojoserezerowiwir.pdfIn PDF document text
    • https://keluargamimpi2.com/contents/files/midogasudomoxug.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613cb00f0b202---mubibamo.pdfIn PDF document text
    • 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_off0005534c.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off0005534c.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0005534c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5534C 10772 bytes
SHA-256: 0a7088aaffd2c746f524233053fb6ec749d2976329352127674ecb440d93cd60
font_01_sfnt_off00056c01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56C01 16800 bytes
SHA-256: bf02be6dc27ad5fb7899d6c3460d1d1c71aa055bd7064145cacd48d59dfa98d3
font_02_sfnt_off000597b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x597B2 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9