Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6095d5d5b814a0d…

MALICIOUS

PDF

70.0 KB Created: 2020-11-26 04:40:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 93a6400358f5b4bb3c9c83de5296f02a SHA-1: 0c799d9a067556a327ccb10f1490a5b8b50da98f SHA-256: e6095d5d5b814a0d911dd71e05bbd7f81c11811fe1205845ff7e06a9ec6b7da9
156 Risk Score

Malware Insights

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

The PDF contains numerous external links, many of which are part of a link farm, indicating a malicious intent to redirect users. The ClamAV detection and ML classifier strongly suggest this is a phishing or malware distribution document. The embedded URLs are likely used to host malicious content or redirect to phishing sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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.
  • 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://traffnew.ru/123?utm_term=ashley+national+forest+fire+restrictions
    • https://cdn-cms.f-static.net/uploads/4411228/normal_5fb5dd3fa0813.pdf
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5fa05d38b198d.pdf
    • https://cdn-cms.f-static.net/uploads/4366306/normal_5f871e1092c51.pdf
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5fbcfff466a89.pdf
    • https://cdn-cms.f-static.net/uploads/4412889/normal_5fb7569b6f6ba.pdf
    • https://cdn-cms.f-static.net/uploads/4378161/normal_5f90e4fc6e41d.pdf
    • https://banafazag.weebly.com/uploads/1/3/4/3/134325205/1ae75f6e.pdf
    • https://cdn-cms.f-static.net/uploads/4373770/normal_5f94597ea9c29.pdf
    • https://cdn-cms.f-static.net/uploads/4417662/normal_5fadd3ea3a079.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/d3f528be-b628-416a-a701-6b2e378b3fd0/35523024757.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d53f.bin
e9cf6e8f3985d95ff6187e1ed565417fb92dc3ffae6b195d7ed82ac8d060fc74		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD53F 5060 bytes
font_01_sfnt_off0000e67d.bin
f0394d235fb8ddf21321f728fb97a27bbf2bfcae006b75cf2d5ae9ee49f18094		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE67D 10704 bytes

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