Malicious PDF — malware analysis report

Static analysis result for SHA-256 c59a068ae4cd587b…

MALICIOUS

PDF

283.7 KB Created: 2020-11-26 23:57:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 954e03b9e6497398a5af44375777e977 SHA-1: 1c8ca04301b073ddfd047c132a949abe93c467aa SHA-256: c59a068ae4cd587bdbb4c457d3db4fd84353f93a2b7fdd8e06540619a6f52255
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by a machine learning classifier and ClamAV as malicious. It contains an embedded URI pointing to 'traffset.ru', which is likely part of a phishing or malware distribution chain. The heuristic 'SE_URGENCY_LURE' suggests the document content attempts to create a sense of urgency to prompt user interaction with the malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://traffset.ru/aws?utm_term=afib+guidelines+2018 PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4378599/normal_5fa4c428a460b.pdfIn PDF document text
    • https://xorozatu.weebly.com/uploads/1/3/4/4/134461248/leraro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459034/normal_5fa97e0e74188.pdfIn PDF document text
    • https://lufukosiresefo.weebly.com/uploads/1/3/4/7/134707539/tedesoligaloku-lajuv-genudutasowubeg.pdfIn PDF document text
    • https://tabikanopik.weebly.com/uploads/1/3/4/7/134705808/49dc8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413473/normal_5fbbf4fdec290.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407316/normal_5fa5a75074fc2.pdfIn PDF document text
    • https://rezukozivir.weebly.com/uploads/1/3/4/6/134631959/31e24750.pdfIn PDF document text
    • https://tenabawik.weebly.com/uploads/1/3/2/7/132710661/702e12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447464/normal_5fa14d53cfc17.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426942/normal_5fa3824c8c1ad.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000417db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x417DB 5108 bytes
SHA-256: 890153cb2fa225c4ddaf2e611f72795f72d65cbd98cade12c72543b0222380c2
font_01_sfnt_off00042946.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x42946 12276 bytes
SHA-256: dfc3b1ded0eae4eb826ad4dd2ce2b601d8ea88a8483ea6c7dcd47c683f8c19b0
font_02_sfnt_off000452f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x452F2 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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