Malicious PDF — malware analysis report

Static analysis result for SHA-256 66721cb118f69d71…

MALICIOUS

PDF

72.8 KB Created: 2020-12-15 08:14:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4eb78ff52061065fbbd21836e064f9f SHA-1: 1a605e9d0e4ddda60507b3c9839a20dc73459140 SHA-256: 66721cb118f69d71cfe4fa28b5aaef427fe7189f34a99d910c07ca086f3ecb27
96 Risk Score

Malware Insights

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

The PDF 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 'traffset.ru', which is likely part of a phishing or redirection scheme. The document body, though heavily obfuscated, appears to reference product details, suggesting a lure to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/123?utm_term=golds+gym+xrs20+weight+bench+dimensions
    • https://cdn-cms.f-static.net/uploads/4425487/normal_5fb590d501ce7.pdf
    • https://libesomed.weebly.com/uploads/1/3/4/9/134904451/b512d180.pdf
    • https://static.s123-cdn-static.com/uploads/4371809/normal_5fc7aaa20ebab.pdf
    • https://galofufe.weebly.com/uploads/1/3/1/3/131384583/2114878.pdf
    • https://gedobelega.weebly.com/uploads/1/3/4/3/134375191/3285497.pdf
    • https://static.s123-cdn-static.com/uploads/4389387/normal_5fcb9d6d49033.pdf
    • https://cdn-cms.f-static.net/uploads/4490269/normal_5fb44ce0829ca.pdf
    • https://biteledazuxol.weebly.com/uploads/1/3/4/3/134315761/demuvapofolujo-rilidomazat-redonofoz-bilog.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static1.squarespace.com/static/5fc0f6bd5687f52b6b817d01/t/5fc32d899d79364840f59d44/1606626698438/85048258767.pdf
    • https://static1.squarespace.com/static/5fc5a2040a2757459b03286b/t/5fc7f9e889a378363f0195af/1606941161411/38972486329.pdf
    • https://static1.squarespace.com/static/5fc0f5b0c6d9645836227daa/t/5fc8e1aa26a3037b434719cd/1607000492372/367301615.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_off0000de40.bin
86f696268f3f9fbccb19f9a4e83f3cefdcb3c0b2a5abe6d04c05dd493170e849		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE40 5852 bytes
font_01_sfnt_off0000f21a.bin
8d81e7b5481fde3c7f2c57c2311d8bb80a1ce1526b7260d0c84e260d37df57d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF21A 10780 bytes

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