Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f7fe6fd60c28d7e…

MALICIOUS

PDF

68.9 KB Created: 2020-12-22 20:45:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-02
MD5: c2bf028353cae413b677b29375f303f2 SHA-1: 7bf8864ca1d7b8ded264b6e57f897fbf2c43d3d2 SHA-256: 5f7fe6fd60c28d7e444b95ac375dcf1b712f4ba5c80df4708689577f994ce5a0
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, with a significant portion pointing to potentially malicious domains, as indicated by the PDF_SEO_LINK_FARM heuristic. The embedded content, though heavily obfuscated, suggests a lure related to 'Waze app icons'. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or distributing further malware via the linked sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/strik?utm_term=waze+app+icons PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4422884/normal_5fbf0c5fd8ed5.pdfIn PDF document text
    • https://tinorivixi.weebly.com/uploads/1/3/4/6/134627636/5901c43.pdfIn PDF document text
    • https://rujupiben.weebly.com/uploads/1/3/4/8/134852491/zudawozigaxuj.pdfIn PDF document text
    • https://jopepikenaz.weebly.com/uploads/1/3/4/6/134652119/3487686.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4405193/normal_5fd27c23c4171.pdfIn PDF document text
    • https://zubawolovef.weebly.com/uploads/1/3/4/4/134481331/d65ce5f7e.pdfIn PDF document text
    • https://xifevaboked.weebly.com/uploads/1/3/4/8/134855042/7844043.pdfIn PDF document text
    • https://julufima.weebly.com/uploads/1/3/4/8/134884845/5268241.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/degerutisig/simplifying_negative_radicals_worksheet.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64a29e2fce462bcb0a474/t/5fc8299ed17d55300fa36836/1606953374217/ecology_definitions_biology.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc52be63398ff751549a8ba/t/5fc673c9bc819f1cf4b6a1af/1606841296552/42941581950.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc4c1dc0b6b03258f4e1bb4/t/5fcc64a7cded405bb8cfb9ab/1607230637660/baxipavamebowuwamipi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc64ab9abaecd331846e276/t/5fd1893ab1f6926771503aa1/1607567674925/pizedoj.pdfIn PDF document text
    • https://s3.amazonaws.com/dubiditiginowo/74048000265.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_off0000d34e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD34E 4860 bytes
SHA-256: 19075c2543a17be2e2098d2c21a465b5d46f40ddcda7b9b42feecb8bc4401132
font_01_sfnt_off0000e402.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE402 10156 bytes
SHA-256: dc803414c1837bb3b509d544bb8ed139a063daef09c6115f6b664eba75b379e5

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