Malicious PDF — malware analysis report

Static analysis result for SHA-256 e163d9bfcfd5ffa5…

MALICIOUS

PDF

63.4 KB Created: 2020-12-26 21:48:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4beda409959c9cc0a6b581408f601390 SHA-1: d7c9d0650e45f91b19ed630f3e6444d3428f8b1d SHA-256: e163d9bfcfd5ffa5931a7c45cffbe0abd4a8f8163f4cd6dadb90e502136dc52e
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URL pointing to a suspicious domain. Heuristics indicate the presence of external URIs and a high likelihood of malicious content, further supported by ClamAV detection. The document body, though heavily obfuscated, appears to reference a game walkthrough, suggesting a social engineering lure to direct users to the malicious URL.

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
  • 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/strik?utm_term=can+you+escape+50+rooms+6+level+43
    • https://cdn-cms.f-static.net/uploads/4386330/normal_5fd84f0441083.pdf
    • https://cdn-cms.f-static.net/uploads/4490949/normal_5fb77de11d1d4.pdf
    • https://cdn-cms.f-static.net/uploads/4495684/normal_5fb335dca2387.pdf
    • https://cdn-cms.f-static.net/uploads/4503197/normal_5fb2ed8a031cd.pdf
    • https://cdn.sqhk.co/joraxeneli/iSiePev/europe_front_full_2._3._10.pdf
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/6431815.pdf
    • https://ferateritilew.weebly.com/uploads/1/3/4/2/134265971/kuwasazoje-milox.pdf
    • https://rivisoni.weebly.com/uploads/1/3/0/7/130739016/2632054.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/fenatagazise/aomais_sport_ii_user_manual.pdf
    • https://s3.amazonaws.com/rakabexozu/giving_directions_worksheet_esl.pdf
    • https://s3.amazonaws.com/lomogas/jevefexiguferekasikipata.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_off0000bb3f.bin
4e1006d698ed2a03c769122eae6059ae953b8fe695d1eaa9e90d9c8145170149		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBB3F 5816 bytes
font_01_sfnt_off0000cf0a.bin
7e059090c9fb12a84806dd719f20425ac7e94634343cf25ee9d1748fce7b16f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF0A 10248 bytes

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