Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38abcaaf0cc4992…

MALICIOUS

PDF

81.7 KB Created: 2021-07-20 04:34:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 872be094a3a77be7b761d3f72309b74e SHA-1: 30e6175eac00ff136d8c63395018032c5b0ecc69 SHA-256: c38abcaaf0cc49923c8d91ac5cd421defed682b108d35256a292ded3dcbcec10
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a PDF phishing trojan. An external URI was found embedded within the PDF's metadata, pointing to a URL that is likely part of a phishing or malware distribution chain. No scripts were extracted, but the presence of the embedded URI and the ClamAV detection strongly suggest a phishing or malicious content delivery attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/pL_UGxDroB4/square?utm_term=1945+power+wagon+for+sale
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60f17fc9db86a67d85863aff/1626439626035/like_water_for_chocolate_book.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f479d96167905317e6a00b/1626634713325/teaching_all_students.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_off0000db52.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDB52 16792 bytes
font_01_sfnt_off0000f369.bin
d41f37796bdb07acf360835cf917a984dc59a9286d10a19ae8c751de556c093c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF369 10764 bytes
font_02_sfnt_off00010c7b.bin
a77a9d79ccd2b083ced08a896e148c5291c6b788275dae064dee1a5583e6fe26		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C7B 17704 bytes

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