Malicious PDF — malware analysis report

Static analysis result for SHA-256 55d06a45e770d410…

MALICIOUS

PDF

77.9 KB Created: 2020-12-17 19:18:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: 8601427f575a4001458a09748a613425 SHA-1: 5abaf90371a8a6fd452da86c47d26fb2d9ddbc33 SHA-256: 55d06a45e770d410e57919fb9d1892e28a34879914487a2fc3a7b945c1519e1c
156 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many pointing to Weebly-hosted PDFs, indicating a link farm or redirection scheme. The presence of the 'my dear boss 2 hacked' URL suggests a potential phishing or social engineering lure. ClamAV and ML classifiers strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://trafftec.ru/123?utm_term=my+dear+boss+2+hacked PDF link annotation
    • https://kikoxelila.weebly.com/uploads/1/3/4/3/134335894/c5c001196.pdfIn PDF document text
    • https://vilifamizebu.weebly.com/uploads/1/3/4/6/134617150/3996266.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/kadupe_ripovu_jozovagazemewe.pdfIn PDF document text
    • https://papuwupiruji.weebly.com/uploads/1/3/4/3/134348025/norusonasebe.pdfIn PDF document text
    • https://danizodeker.weebly.com/uploads/1/3/4/5/134581754/813f93.pdfIn PDF document text
    • https://vebifejelib.weebly.com/uploads/1/3/0/7/130775119/xekusoxu.pdfIn PDF document text
    • https://rugufixib.weebly.com/uploads/1/3/4/3/134381394/ffdd0f8616cbaf.pdfIn PDF document text
    • https://lozulijulejibog.weebly.com/uploads/1/3/1/8/131857057/d3a315e2a9534c.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd2ff2c23b2b0938fbe3ea/1606234098662/82981293218.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc35f5bd49dd124474406bb/t/5fccd6d824c49707d31e34cd/1607259864223/levimatotigiraxup.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc537ff085bf90c0e196c76/t/5fd740fc164d0f203c974ca2/1607942399941/48822443743.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc302ce16f6d44b07cc72db/t/5fc3887f3c6ccf69f3cbdef8/1606649983846/84500059812.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc1520988c99b6d37aa082c/t/5fc41755a97599144e786155/1606686554053/tavogebasogugufegop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0371cda1-f6fc-4e3c-b3da-f59246ba7602/pyromancer_build_guide_vermintide_2.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_off0000f381.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF381 5440 bytes
SHA-256: 2774d42acd54e1b5927658d505a6f78ca8e66efbb5ae20157dc9d872d9a15ec5
font_01_sfnt_off0001060b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060B 10728 bytes
SHA-256: 619d4032765ab7c06465fa3478ae09b25a709f547ff2cd840279a9238402b00f

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