Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa8899f7634780a8…

MALICIOUS

PDF

332.6 KB Created: 2022-02-08 02:25:47 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-06
MD5: 3b4d5820629ad39e1dd6866db3dba402 SHA-1: 4537d26c0d1c45b19b77b8c70afd0feee24b96ef SHA-256: aa8899f7634780a88d4e1544e707e430c2b28850988347116db7aa8a21a6bc42
166 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.7167

Heuristics 6

  • 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.
  • 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://lovig.co.za/XSRYdR1H?utm_term=up+b.+ed+2019+answer+key PDF link annotation
    • http://jerry-cheese.com/kcfinder/upload/files/50382088098.pdfIn PDF document text
    • https://www.highlandernepal.com/assets/ckfinder/userfiles/files/52972369917.pdfIn PDF document text
    • http://www.groupementpecheduloir.com/ckfinder/userfiles/files/xevesox.pdfIn PDF document text
    • http://mfplus.ba/wp-content/plugins/formcraft/file-upload/server/content/files/161d81a41e88c1---11179456152.pdfIn PDF document text
    • https://noble-worldwide.com/wp-content/plugins/super-forms/uploads/php/files/73a2a2516b32ae4fb2023ac606ed2170/xutibomogumaguzazijaw.pdfIn PDF document text
    • http://www.bargiel.com.pl/ckfinder/userfiles/files/mijowigobekud.pdfIn PDF document text
    • http://armiikrajowej36.pl/public/upload/ckfinder/userfiles/files/60322801119.pdfIn PDF document text
    • http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/161a45dfd64a97---zoraposafarip.pdfIn PDF document text
    • http://www.theflightfest.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e42668e3090---51942656890.pdfIn PDF document text
    • http://www.risingstars.com.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16187c269270fc---tinen.pdfIn PDF document text
    • http://newcompanyindia.com/admin/userfiles/file/penogeleribiped.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/16167ce6f2d6e4---nepiguv.pdfIn PDF document text
    • http://znsedu.net/admin/ckeditor/kcfinder/upload/files/69947228058.pdfIn PDF document text
    • http://jaluzipro.ru/public/userfiles/file/65541124686.pdfIn PDF document text
    • https://mirrorlink.com/public/files/files/pufavufosiwi.pdfIn PDF document text
    • http://colorfusion.us/admin/images/file/bakuvigenefevogi.pdfIn PDF document text
    • http://tjsyjdq.com/v15/Upload/file/20219141925117993.pdfIn PDF document text
    • http://xn--80aer5aza.xn--c1acndkmcarx.xn--p1ai/ckfinder/userfiles/files/jekanigubewebagotezop.pdfIn PDF document text
    • https://naturecare.com.au/kcfinder/upload/files/vagavedo.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/16128dc8ce961d---riwewijisemojuweg.pdfIn PDF document text
    • https://alicantea.centralcms.cloud/galeria/files/46133406296.pdfIn PDF document text
    • http://niezapominajkowo.eu/userfiles/file/jexakebanosejibomuf.pdfIn PDF document text
    • https://ijestr.com/ckfinder/userfiles/files/5400942496.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 PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0004c602.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C602 17092 bytes
SHA-256: ab35cc5a4e651e407d1d9be49e3837101fe550cfc4e2b382f66abd3c67874766
font_01_sfnt_off0004f2be.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F2BE 10996 bytes
SHA-256: 9ec30a7bb2f1e6aae17273f39b469ec61a1945df5ebd8178e0faa55d4b57b575
font_02_sfnt_off00050c5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50C5B 16560 bytes
SHA-256: 924ad5cb737cfd9a34472b2046831991df4d3950e5f0d7b552a18309318c2ee9