Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd68cc83ba6e5dac…

MALICIOUS

PDF

150.6 KB Created: 2021-07-16 00:45:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62527fb5bff08eec19252898e6bb74ed SHA-1: 039fff6e0e3dd6e11ee499ada0d7daffb0ceda84 SHA-256: bd68cc83ba6e5dac5f7d670a834d3934691746593a9cd0db1e44609064a74c64
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV, with heuristics indicating the presence of external URIs. Although the document body is heavily obfuscated and unreadable, the embedded URLs suggest a phishing attempt. No scripts were extracted from this sample, limiting further analysis of its execution behavior.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3434

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/sq/ugae/~3/iXsW93xxTQA/square?utm_term=to+kill+two+birds+with+one+stone+sentence
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e91f22db8bb141bad94e29/1625890594465/right_to_education_notes.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0aa0026c12a5de43b53ef/1626384896329/nabisi.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e9453dc14ff043cd5e0392/1625900349863/film_after_life_streaming.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f06ffabe92cf351533a02c/1626370042881/square_table_1_to_50.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_off0001eed6.bin
a92f7cb0ef1e270d5b653cdff80b9c8bfbc2cd025a9925cffd77fa89be779f63		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1EED6 10584 bytes
font_01_sfnt_off000206f9.bin
968da3dc3ed6459251cf37f5f3a1922cbd5338b162928cf1e471565286ee9f90		 pdf-font-stream PDF embedded font (sfnt) at offset 0x206F9 17904 bytes
font_02_sfnt_off00023624.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x23624 16792 bytes

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