Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ace7e33b7ddd170…

MALICIOUS

PDF

50.6 KB Created: 2020-11-25 22:34:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 424e377d07d75d1283ef3646d71ec985 SHA-1: ca24d64c163296b6c9ad25d995678f0cbf31afb4 SHA-256: 0ace7e33b7ddd170d1f87555e01046b7e489dba00a4d891999bb1c97e7548f6f
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains multiple embedded URLs, including one pointing to 'trafffi.ru', which is flagged as a link farm on disposable hosting. The ClamAV detection and ML classifier indicate malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest it's designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8920

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://trafffi.ru/aws?utm_term=format+python+code+in+sublime
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/5101266.pdf
    • https://papilezuserif.weebly.com/uploads/1/3/4/4/134437149/1e4c8eb73a468.pdf
    • https://fakimodixoto.weebly.com/uploads/1/3/0/7/130739088/6306106.pdf
    • https://wobomiti.weebly.com/uploads/1/3/4/5/134501920/kasutu_zebobemi_xofusaber.pdf
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5fb27f2acb9da.pdf
    • https://junoxavod.weebly.com/uploads/1/3/1/3/131384771/e541bd473.pdf
    • https://cdn-cms.f-static.net/uploads/4421969/normal_5fb6f07898c61.pdf
    • https://s3.amazonaws.com/wenobagupexekap/59676796138.pdf
    • https://s3.amazonaws.com/vidadaviwal/gukadanuxaxumage.pdf
    • https://s3.amazonaws.com/kovilowab/the_art_of_star_wars_uprising.pdf
    • https://uploads.strikinglycdn.com/files/69ae696e-e612-42ec-b613-6ddf6a30a738/72976978467.pdf

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c05b.bin
58d72bf77caf06f196ded4b34c89bed61a9c4a6ede306bb0efd38173e7a75772		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC05B 3016 bytes

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