Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e7c6d639bfa4b9b…

MALICIOUS

PDF

67.2 KB Created: 2020-12-17 10:21:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 10267f368711908a105c935afa88f905 SHA-1: d5b1a7b412358f2e7a379d68931149cb75257ade SHA-256: 5e7c6d639bfa4b9be59a40343015445d253387b019e232714dea5d9dacf5a1a1
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, 'traffine.ru', disguised with a seemingly innocuous URL related to 'The Great Gatsby'. This indicates a phishing or credential harvesting attempt. The ML classifier and ClamAV detection strongly support the malicious nature of this file.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://traffine.ru/123?utm_term=the+great+gatsby+chapter+4+summary+shmoop In PDF document text
    • https://cdn-cms.f-static.net/uploads/4501996/normal_5fb5729c7b2fc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_5fad86763d902.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4465277/normal_5fcc8bdd80950.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403676/normal_5f935c3392c1a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4411915/normal_5f9c8993a1969.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455639/normal_5fba91fdab62d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458144/normal_5fb976c314be7.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/d47ea921-a838-4610-a97a-0652f066ab97/2816409810.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/812c10cc-e94d-4d03-98c2-c77395c026fb/janiwu.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfa3873299f0c5439c7a5/1606220347975/ffxiv_ui_guide.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbcfc1e64be903ae6404bf7/1606220831156/graph_of_cube_root_of_x.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc0e99fa13a450babf41659/t/5fd21b51880fa23343dbaafc/1607605074776/93249800003.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_off0000caba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCABA 5592 bytes
SHA-256: 353c38b5ac942cf11a04ba2cbd0913f3398ec641c5eeec76c21ebb48f6059187
font_01_sfnt_off0000ddaa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDAA 10108 bytes
SHA-256: b38f1eb157e59aadc943fa49e720507b8b30f720a2714ab1cbf4a3371605a44b

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