Malicious PDF — malware analysis report

Static analysis result for SHA-256 d397cbd2ef9dc4e4…

MALICIOUS

PDF

67.3 KB Created: 2020-12-27 07:15:48 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: e6c2f78ab0d4c25a09a5e46e9f1654b5 SHA-1: b2f1b977cf8ee58f04bef919e25e1d1e8d7d3e35 SHA-256: d397cbd2ef9dc4e43d23a0ea4c0b44c08ce2cd32ec5108fa81ffe305ad1eb12f
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, with one pointing to 'trafffi.ru', a domain associated with malicious activity. The ML classifier and ClamAV detection strongly indicate malicious intent. The PDF structure suggests it's designed to host a link farm or redirect users to potentially harmful content, aligning with phishing or malware distribution tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://trafffi.ru/strik?utm_term=cass+county+electric+coop+fargo PDF link annotation
    • https://nubajegi.weebly.com/uploads/1/3/0/8/130814178/b8d5b4c40ce8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389085/normal_5f9e7d952289c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4465003/normal_5fbeea5099d02.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373508/normal_5fca7bc82322e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4479938/normal_5fadf01c4fe09.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/gifiz/divinity_original_sin_enhanced_beginner_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/gozilum/nabepekevilawedumufovuso.pdfIn PDF document text
    • https://s3.amazonaws.com/tosevud/lawafibelevujogu.pdfIn PDF document text
    • https://s3.amazonaws.com/xeropizuwe/eternal_magic_mage_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/mutirexa/pathfinder_void_domain_deities.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c20f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC20F 5192 bytes
SHA-256: 46fb25f37500b2d842bcc893e2e07e95a29b1cd5ae8e04b26fa035e6d3894488
font_01_sfnt_off0000d3c8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD3C8 2268 bytes
SHA-256: 72a3fe65f0a21df30f240897224061cfa351088b80a4eb601fb5defb198ec993
font_02_sfnt_off0000ddda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDDA 10132 bytes
SHA-256: 8df6b959d34eded89a14f6d6b80180f9f68fbe257339c20fddee9a4eb277b182