Malicious PDF — malware analysis report

Static analysis result for SHA-256 db2cc6eccdb63142…

MALICIOUS

PDF

50.6 KB Created: 2020-12-15 05:03:57 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1fbd43642a39703a305487a2f03c8467 SHA-1: 4468e213fcbad0ed78da35407d82176d10adb9a1 SHA-256: db2cc6eccdb63142f2314310ffc2ec71c7c89b9b703794bd05ec3348afa1ca27
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-heavy nature and embedded clickable link. The ClamAV detection and ML classifier further support its malicious classification. The document body, though heavily obfuscated, contains references to 'central monitoring station cms software', suggesting a potential pretext for the phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6878

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 50 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://traffset.ru/aws?utm_term=central+monitoring+station+cms+software
    • https://cdn-cms.f-static.net/uploads/4383470/normal_5f9990f7b2e64.pdf
    • https://cdn-cms.f-static.net/uploads/4367301/normal_5f8cbd10cb6d0.pdf
    • https://static.s123-cdn-static.com/uploads/4402252/normal_5fceb1d3c6b92.pdf
    • https://cdn-cms.f-static.net/uploads/4393638/normal_5fb39b2988a45.pdf
    • https://dovasuseburipir.weebly.com/uploads/1/3/4/3/134394860/betofosem-xopaziwoxazu-devepe-fukulefumo.pdf
    • https://zegojipoxe.weebly.com/uploads/1/3/1/0/131069766/2860539.pdf
    • https://kufazijofiw.weebly.com/uploads/1/3/0/7/130776126/1739515.pdf
    • https://gewosawoma.weebly.com/uploads/1/3/0/7/130739201/subokamudotoker.pdf
    • https://cdn-cms.f-static.net/uploads/4409606/normal_5fd15209c032a.pdf
    • https://uploads.strikinglycdn.com/files/38ef28b3-b396-4236-8cbb-d82b4c1277dd/yaariyan_full_movie.pdf
    • https://s3.amazonaws.com/lusabifef/js_add_to_formdata.pdf
    • https://uploads.strikinglycdn.com/files/dbfd6002-c000-4a9c-8c63-0ece1189bf74/ewha_korean_textbook.pdf
    • https://static1.squarespace.com/static/5fce94bb15f2b100e6120ba3/t/5fd06f8d0c0c9b10ab0869cc/1607495567491/shooting_army_games_online.pdf

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