Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a242f79eba685c9…

MALICIOUS

PDF

81.0 KB Created: 2021-07-13 18:48:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 6b56b75053a971e04e9ebb91b798c52e SHA-1: fb14bf12369d70f8465cce6f0642e25923b66d63 SHA-256: 7a242f79eba685c9ff267f49af124c6b53bb0a13c9b3ae55f1fa5301d0f76e74
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The PDF contains embedded URLs, one of which is flagged as potentially malicious, suggesting it's used to redirect the user to a harmful site. The document body is heavily obfuscated, preventing a clear understanding of its specific lure, but the presence of embedded URLs and the malware detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6221

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://feedproxy.google.com/~r/razvivatel/yapz/~3/pL_UGxDroB4/square?utm_term=call+me+by+your+name+audiobook+armie+hammer+free
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed96f35860d606f481d021/1626183411552/current_affairs_2020_mcq_with_answers.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec9491b3b63f0898f36a24/1626117265200/79099849514.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e818418f757b1ac453f09e/1625823297971/7750049386.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d8d3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD8D3 16792 bytes
font_01_sfnt_off0000f0ea.bin
bfa0f11cb557972355167b939df726c56cda32ef55f1c734600ceba82dd706a2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF0EA 10832 bytes
font_02_sfnt_off0001099f.bin
7ea5161003578383fbdd84b8c59df738341890b3aa8e55bf063d61d003ab56b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1099F 17596 bytes

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