Malicious PDF — malware analysis report

Static analysis result for SHA-256 5acecaa4dfe5961b…

MALICIOUS

PDF

62.1 KB Created: 2020-12-02 02:04:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 6211b27fcd1bd99938494b6fd1c4c094 SHA-1: 1b6de7be0cdb03d44788d6e14451305bc411567b SHA-256: 5acecaa4dfe5961ba8d055c4642cf613b5ed017c0943c53ada2d490641c90e29
156 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan threat. It contains a large number of external links, suggesting a link farm or redirection mechanism to malicious sites. The presence of embedded URLs and the PDF_SEO_LINK_FARM heuristic strongly suggest the intent is to direct users to potentially harmful external content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=enamorate+de+ti+in+english PDF link annotation
    • https://defuzeje.weebly.com/uploads/1/3/4/8/134883556/nisigusofivo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459036/normal_5fafb670031f3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fa2005725c1d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4394082/normal_5fa502e0bf3f2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382414/normal_5faf36325a9fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4498994/normal_5fbeb914051d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413000/normal_5fafd73493197.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/6296765.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368246/normal_5fc06f1f9946a.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4488556/normal_5fc5d3998f13f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392457/normal_5fbedd4dbd5f5.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbdee511972c46e3c641167/1606282833682/essential_and_nonessential_clauses_worksheet_with_answers.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbfd56316f6d44b07b8b81c/t/5fc0f3b6173fb5383bc40b50/1606480823007/adobe_animate_cc_download_with_crack_zip.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b710.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB710 5196 bytes
SHA-256: ee160e00117c4aa58b01f699dec208a63df7951eeddd6b0fbd70c7f6efda1b8c
font_01_sfnt_off0000c88f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC88F 10700 bytes
SHA-256: 369039de36dd8199577cf403621a52284312742a568d65df3f0b63b1b4be0628

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