Malicious PDF — malware analysis report

Static analysis result for SHA-256 16a327c25fd4e11b…

MALICIOUS

PDF

78.4 KB Created: 2021-07-18 06:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c192f4148704f0c3e315a42205cfe059 SHA-1: 5d5a2102864b988d8fb52e371710be1cc3441b5c SHA-256: 16a327c25fd4e11b81266dd608358db34ea5185e46c14a799b021abebe8e850c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a malicious PDF by ClamAV and an ML classifier. It contains an embedded URL that, while flagged as benign in this analysis, is a common tactic for phishing or malware delivery. The PDF structure and heuristics suggest an attempt to exploit or redirect the user, aligning with phishing attack patterns.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6166

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/-MXWpcYQ7kA/square?utm_term=mountain+view+cremation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e8e89d787dde1a90ab223d/1625876637415/the_adventures_of_an_it_leader_2016.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7c3d457d2352c927b3254/1625801684950/17977935542.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee703ef6c772366d30fd41/1626239038595/2nd_puc_computer_science_1st_chapter_notes.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93ccae51f1f218d6ae073/1625898186312/silent_hill_games_ranked.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_off0000d27e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD27E 16792 bytes
font_01_sfnt_off0000ea90.bin
1a28537cfec14d4da013601c50fb28408faa6aca517379e3cb8f4bc66aaf8eec		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA90 16820 bytes
font_02_sfnt_off00011664.bin
17cd71099f42502b773251c7cca3cb1e3c255aa7b0e56cd5789c07ae6ade9f1a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11664 10420 bytes

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