Malicious PDF — malware analysis report

Static analysis result for SHA-256 7d46367b692e4fa2…

MALICIOUS

PDF

74.0 KB Created: 2020-11-22 16:20:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e8f1f9495db7f15c99e373b28cfd686 SHA-1: 1bf62205ba071cbdf82020af2c6359e5143fb151 SHA-256: 7d46367b692e4fa2c4f9821bca8b7dd7013361eb8d78da9fc5b3fec20968544e
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, identified as a link farm, suggesting an attempt to drive traffic to malicious or scam websites. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards a phishing or scam campaign, likely initiated via spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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.
  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://traffine.ru/123?utm_term=pro+ana+exercises+lose+weight+fast
    • https://fobujetomifaj.weebly.com/uploads/1/3/4/7/134765034/luxinog.pdf
    • https://cdn-cms.f-static.net/uploads/4499005/normal_5fb608cbea640.pdf
    • https://cdn-cms.f-static.net/uploads/4446781/normal_5fa39f05aa93c.pdf
    • https://negiwonilelif.weebly.com/uploads/1/3/4/5/134583179/vesemugakivope-xodozijire-fusujonofef-sebokaloselefe.pdf
    • https://cdn-cms.f-static.net/uploads/4368984/normal_5f94c7d597e89.pdf
    • https://cdn-cms.f-static.net/uploads/4367311/normal_5f908b22d2b29.pdf
    • https://gasomuvujutomeb.weebly.com/uploads/1/3/4/3/134356107/0a81035.pdf
    • https://cdn-cms.f-static.net/uploads/4456686/normal_5fa5d5fcccaf1.pdf
    • https://cdn-cms.f-static.net/uploads/4388825/normal_5fa8860c9a7ef.pdf
    • https://cdn-cms.f-static.net/uploads/4413002/normal_5fa97ed3881c1.pdf
    • https://cdn-cms.f-static.net/uploads/4464330/normal_5fb6a494dda1a.pdf
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/nojifusuvuve.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/925a3293-fda7-404a-89ba-30b2213b2c10/xamituxaxuwuvazumitored.pdf
    • https://s3.amazonaws.com/fekazudabo/the_vatican_tapes_imdb_parents_guide.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e4d1.bin
2307fcda6b5d0254bb13895eb15489b897b7fa28bb7547b020b04beed45ebf8e
pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D1 5304 bytes
font_01_sfnt_off0000f6ec.bin
71e7c1ab22ca8092890ea5d362e1a6ea0bfcf7fda3b007381a950b3b09faa17f
pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EC 10656 bytes