Malicious PDF — malware analysis report

Static analysis result for SHA-256 044eeba6c8ef4929…

MALICIOUS

PDF

82.8 KB Created: 2021-01-11 08:46:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 60a9dc146291dc95cc876dd44f8b9e31 SHA-1: 3e9814404aed491a8a515487f1771ec7ff177374 SHA-256: 044eeba6c8ef4929ce1414431a5a6f92381c4dc145cf8bf820eb27d543de2f65
96 Risk Score

Malware Insights

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

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to 'trafffi.ru', which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, suggests a lure related to medical treatment guidelines, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9964

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://trafffi.ru/aws?utm_term=empyema+treatment+guidelines+idsa PDF link annotation
    • https://falugasotemo.weebly.com/uploads/1/3/1/4/131410545/bizor.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369491/normal_5ff1737f194c0.pdfIn PDF document text
    • https://site-1167955.mozfiles.com/files/1167955/agatha_christie_s_marple_episode_guide.pdfIn PDF document text
    • https://site-1179443.mozfiles.com/files/1179443/texuzew.pdfIn PDF document text
    • https://site-1168029.mozfiles.com/files/1168029/4595317955.pdfIn PDF document text
    • https://site-1083679.mozfiles.com/files/1083679/zerolu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4491148/normal_5fb6e2f318629.pdfIn PDF document text
    • https://site-1173608.mozfiles.com/files/1173608/54028770564.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/zomuzigo/2020_mercedes_benz_a_class_hatchback.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000106e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106E0 5336 bytes
SHA-256: 8e8c1f6e380c3227785654ab647f851e5ceac52e0324771a827f9dc23d92eda4
font_01_sfnt_off000118fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x118FD 11072 bytes
SHA-256: 21f5436efb3ec4ce006455e06998f48257e310007bfacb8f0f2eca5c8c4c75a5

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