Malicious PDF — malware analysis report

Static analysis result for SHA-256 267174bc921ad886…

MALICIOUS

PDF

69.4 KB Created: 2020-11-23 18:39:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 430dd2126d84d931068d74241753ab40 SHA-1: cb465f58d92585a05a717267418de79af20f4d71 SHA-256: 267174bc921ad8861b98ccf391d9190757e39b4a0a39cbb3ed7c9aadfae676df
96 Risk Score

Malware Insights

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

The file is identified as malicious by ML classifiers and ClamAV, with a critical heuristic firing for ClamAV detection. It contains an embedded URI pointing to a suspicious domain, trafffe.ru, which is likely part of a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create malicious PDFs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • 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=applied+behavior+analysis+john+cooper+pdf PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4386086/normal_5f92425a86502.pdfIn PDF document text
    • https://rugazodexozapef.weebly.com/uploads/1/3/4/4/134480570/rafogiregowebi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368222/normal_5f9c17b1e66eb.pdfIn PDF document text
    • https://farupixin.weebly.com/uploads/1/3/4/3/134314126/makadi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415321/normal_5fa0d2e55821b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367287/normal_5f8c2334deff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368979/normal_5faeb1a474f56.pdfIn PDF document text
    • https://gitijekukojijot.weebly.com/uploads/1/3/4/6/134626905/a69a13a.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/solonebosop/solving_equations_and_inequalities_answers.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9760d02a-2d9b-4951-8301-ed3b65893888/god_s_providence_definition.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/489647eb-6e47-4769-8f24-a942b97af27f/64192502907.pdfIn PDF document text
    • https://s3.amazonaws.com/mefovu/kodilu.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_off0000ce44.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCE44 5608 bytes
SHA-256: 6f6f3aa3b6d808da673893947427915f78f25b85edf883ccbc6db8b4a49543f0
font_01_sfnt_off0000e15e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE15E 11296 bytes
SHA-256: d5f7298710c08a1fd69f40b03b515af6f27b80787d8ceaac780f6b3b6c7aa568