Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bd9951af96bd42e…

MALICIOUS

PDF

68.1 KB Created: 2020-12-14 11:01:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f305d3c0d80bbfb40fbcdc1762e61cd0 SHA-1: 72ff07a505656a14d503d4127b626139dea94078 SHA-256: 3bd9951af96bd42e55f8999f15c3090b159bc405a28e0bebf9e60b61db7eca5c
96 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffe.ru', which is likely a phishing or malware distribution site. The document body, though heavily obfuscated, contains references to news and city information, suggesting a lure to trick users into visiting the malicious URL.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://trafffe.ru/123?utm_term=oregon+city+news+clackamas+review
    • https://lebotisoko.weebly.com/uploads/1/3/4/5/134597635/magugogomekiga-jusojoxopetelet-nikev.pdf
    • https://cdn-cms.f-static.net/uploads/4374379/normal_5f896528bef68.pdf
    • https://static.s123-cdn-static.com/uploads/4428083/normal_5fd0924969e51.pdf
    • https://cdn-cms.f-static.net/uploads/4404122/normal_5fbaadb3be957.pdf
    • https://static.s123-cdn-static.com/uploads/4468531/normal_5fc66c1596949.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/3543219d-309b-4d5e-9f02-c9ed4b7ad501/advantages_of_biometrics.pdf
    • https://uploads.strikinglycdn.com/files/ad9081a4-efb9-4eee-ab1f-5e6628846330/irrational_beliefs_examples.pdf
    • https://uploads.strikinglycdn.com/files/033690ad-568a-499b-a52d-2f1c62d181e5/gloria_trevi_story.pdf
    • https://uploads.strikinglycdn.com/files/94ae28a5-0d50-41d7-9000-df940b17bbf1/openbve_mta_trains_download.pdf
    • https://uploads.strikinglycdn.com/files/ed6398d3-bb5e-4811-b412-73c653adace0/sherlock_holmes_download_sub_indo.pdf
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbe1a2b08845d0924529ce6/1606294060325/bugofirisu.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_off0000cc81.bin
d6cc98b121e988c45d60d67ca7574f6d167c0e33958e5bb553803271c3520d51		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCC81 5464 bytes
font_01_sfnt_off0000df28.bin
941429a06dc35ec32089846e5b689c4e4be7d1fd75f4f4290d69d15977266b68		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDF28 10720 bytes

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