Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2cb891d9d7c891e…

MALICIOUS

PDF

85.2 KB Created: 2021-07-13 00:23:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 187a3c682ea046b5353d1679699883aa SHA-1: 5f7509fc9342eceedf716480a2d6af41363eca01 SHA-256: a2cb891d9d7c891e29cd2c30f0267520930615dd1cfc1bf0f6592c180723a013
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV heuristic identified this PDF as a phishing trojan. The PDF contains embedded URLs that point to external resources, which is a common technique for phishing attacks to redirect users to malicious sites. While no scripts were explicitly extracted, the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1404

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/aauXj3bnHUA/square?utm_term=stutter+and+stammer+meaning
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ecaeffc4d2886679e2fc3b/1626124031960/flower_seed_production.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecb13a82c35958e2869ac0/1626124602620/introduction_to_analytical_chemistry_notes.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e266.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE266 16792 bytes
font_01_sfnt_off0000fa43.bin
548550beeab23f7d0bb8272967e1b0b246e260a8ab61889fc6223adf603ad230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA43 1240 bytes
font_02_sfnt_off0001016f.bin
0589f5c11bac23f6f049ce9803f450c10e5eb08f5f880949850a7dcde41ad081		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1016F 10600 bytes
font_03_sfnt_off00011961.bin
41af90ca977be56dda80a2074a255a6eaf7a838930e4c75fb32cfdad81d439af		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11961 18072 bytes

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