Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd6da8dd6def3766…

MALICIOUS

PDF

76.8 KB Created: 2021-07-13 08:41:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8115700205dc2c12d922d1d20734408a SHA-1: 5ade92dce362e27c532f0332ab74448746f179bd SHA-256: bd6da8dd6def37669729235598cbb80474825ec9a96ce0c0711c9792711781b6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI that points to a URL, likely intended to redirect the user to a phishing site. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it's designed for social engineering.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9163

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/kVSxLQpkboc/square?utm_term=hypersensitivity+with+anxiety
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec9484f83a7f26ecd1fad2/1626117252587/lunitemavobuwomu.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e7df5325441e1b37862554/1625808724070/how_to_grow_aloe_vera_plant_at_home_fast.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e82bce85664d35b0ead38c/1625828302193/brother_hl_1030_manual.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecfb5eff6d86145b9ac25c/1626143583060/wrong_turn_6_full_movie_online.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecf330bc85f73bac219b99/1626141488260/9892660988.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec81ab31b0b43e07e6a3ff/1626112427115/consistent_system_of_equations_example.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec84d072e2584f24636ce2/1626113232620/most_question_in_interview_in_call_center.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_off0000ce74.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE74 16792 bytes
font_01_sfnt_off0000e686.bin
327c0349721f288d83e8e207fd865e1f3a5b49142f766ccab9343c2346d224f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE686 15904 bytes
font_02_sfnt_off00010f39.bin
52510d692fccb50b8ce9bd3edee4fbd496b18a9d1b843d349af68c0a3c3655d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10F39 10544 bytes

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