Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9f79de2d3e765f9…

MALICIOUS

PDF

88.6 KB Created: 2020-12-25 19:34:12 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: f8c8e92730656fcc6f3c61f6c76420fe SHA-1: cb739e7ac75b8173be869bc92a30debc8f9693ef SHA-256: b9f79de2d3e765f948b2f727b6e738069d5b870ab31717547d463a1584632888
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains a link to a known malicious redirector, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection further support its malicious nature. Although no scripts were explicitly extracted, the presence of embedded URLs and the overall detection suggest an attempt to exploit users through deceptive content, likely leading to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9228

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://traffine.ru/aws?utm_term=thailand+guidebook+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4369914/normal_5fa96105af50b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/leguvefu/gunov.pdfIn PDF document text
    • https://s3.amazonaws.com/wikurixobelu/31879034139.pdfIn PDF document text
    • https://s3.amazonaws.com/farowug/replacement_bulb_guide_for_automotive.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6d9c895-d26d-4dbc-af57-d8e386a75fac/vopabumigexuvotawolotel.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b25eacd-ec28-4433-af5e-dd7700a8acbd/3_tier_chocolate_wedding_cake_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ec827e7f-c551-40af-ab42-4aa705fd5f5c/vidosifusajimewufon.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fc45fe1-7a1a-47fb-89b0-9c3bbb5171e2/zombie_hunters_online_webgames.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0000cbe-39dc-44e1-ad59-01080aa879b7/25619181967.pdfIn PDF document text
    • https://s3.amazonaws.com/xisakazelelinim/96238543851.pdfIn PDF document text
    • https://s3.amazonaws.com/viboxikuz/sugalefekisisiwokabuva.pdfIn PDF document text
    • https://s3.amazonaws.com/temujonuwu/43069055224.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae1d9da0-b7a2-440c-9986-7e0b0491acbc/fique_rico_ou_morra_tentando_filme_c.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1ec1855a-1fd6-4293-9701-8959a6e0b72e/42145576595.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012813.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12813 5180 bytes
SHA-256: b270ba1cb261399de3c6ceb42fa478080795339cd54e0673650985efb0ef9111
font_01_sfnt_off000139b4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x139B4 11848 bytes
SHA-256: 8398c2d5369151827f2601d50f2aa75d533eb91a06b56895a87996a579c88775