Malicious PDF — malware analysis report

Static analysis result for SHA-256 043232cdfa2ef0a5…

MALICIOUS

PDF

68.4 KB Created: 2020-11-26 09:29:35 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fa519c94a1322b7a13cefbbb7167050e SHA-1: 1ed02a2c8ffc4dd0d08161fde4caba8b981d33e2 SHA-256: 043232cdfa2ef0a56462f4bfc6104409e57e780e6a7c9b3e56c6d0bfaf6cc5fa
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple external links, with one heuristic specifically identifying a 'PDF_SEO_LINK_FARM' pointing to a suspicious URL. The ClamAV detection and ML classifier also indicate maliciousness. While no scripts were extracted, the presence of embedded URLs and the overall structure suggest an attempt to redirect users to malicious content, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7314

Heuristics 4

  • 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
  • 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://traffnew.ru/strik?utm_term=viking+spa+manual+2020
    • https://sorimuzumetig.weebly.com/uploads/1/3/4/5/134519591/cc6ebe14265e5.pdf
    • https://cdn-cms.f-static.net/uploads/4463263/normal_5fad964f0630c.pdf
    • https://cdn-cms.f-static.net/uploads/4388406/normal_5f9a9523ef52b.pdf
    • https://cdn-cms.f-static.net/uploads/4371791/normal_5f8b5c8b79e66.pdf
    • https://uploads.strikinglycdn.com/files/a29f5eba-a9f5-44e3-bf72-cc12cb71c002/mosawekaxerobejebazibaf.pdf
    • https://uploads.strikinglycdn.com/files/0ad4233c-b1a7-40e5-a1f2-8783d8470d18/15955273034.pdf
    • https://uploads.strikinglycdn.com/files/848ec613-7509-4325-8b52-04a3034a565d/85194347090.pdf
    • https://uploads.strikinglycdn.com/files/8e700fdd-bc2a-409b-be62-3deccca5af31/clasificacion_de_cuentas_contables_ejemplos.pdf
    • https://s3.amazonaws.com/buxoparadazegu/63546652072.pdf