Malicious PDF — malware analysis report

Static analysis result for SHA-256 240f9082f13ab744…

MALICIOUS

PDF

80.6 KB Created: 2021-07-16 13:25:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 2c2690c17b1a9aa91e4639dc684fea6d SHA-1: 09d7a2c7974c6b7253de7ce38bc4cf4da72bcf46 SHA-256: 240f9082f13ab744be43e60bd65c0731b34baa1de357af1f6c2203a778d9b6e3
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, even if some are confirmed benign, suggests an attempt to lure the user to external resources. No scripts were extracted from this sample, but the PDF structure itself is indicative of a phishing or malware delivery 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/sq/ugae/~3/5VO7y1TeAqQ/square?utm_term=costophrenic+angle+definition
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0109bfdf15601434b3f87/1626345628599/list_with_different_data_types_c.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8764dc9bfd671df37060b/1625847373504/how_we_get_deleted_videos_from_phone.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edede1a4137771ba03c2b9/1626205665502/david_bowie_somebody_up_there_likes_me.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_off0000d853.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD853 16792 bytes
font_01_sfnt_off0000f065.bin
23c42fd459a360221fce6a08faffccfecaa37d09f6c0b2bd6deec5de40d71562		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF065 17420 bytes
font_02_sfnt_off00011dad.bin
905f0863dcddc5a7d558cf928f7eb9c97351184f5a4e6d01256a83425621c4ed		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DAD 10932 bytes

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