Malicious PDF — malware analysis report

Static analysis result for SHA-256 485cc123f54e640d…

MALICIOUS

PDF

74.4 KB Created: 2021-07-19 06:23:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5807d9c3a9f6285567f180e6c1556d43 SHA-1: eb2973d3079f01353c5d39d11cff4665b340cbbc SHA-256: 485cc123f54e640d529be8991ec1ad8a1538e95d09d998b3ac0e63dae1f79de6
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ML classifiers and ClamAV as malicious. It contains an embedded URL that, while currently flagged as benign, is indicative of a phishing or malware distribution attempt. The PDF structure and heuristics suggest it's designed to trick users into clicking external links, a common tactic for spearphishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7056

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/razvivatel/yapz/~3/AG-UZpNbJGc/square?utm_term=skeptic+annotated+bible
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc329a0f2ca3483cf120a/1626194729197/93109470952.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f091d1b1b216540218a6ef/1626378705399/linear_equations_in_two_variables_class_10_solutions.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee6b15c27d1e40a54d19f2/1626237717380/bree_tanner_from_twilight.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f483b91db272198fa434f5/1626637241672/85417151690.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_off0000c3d4.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC3D4 16792 bytes
font_01_sfnt_off0000dbe6.bin
eaba510b8a9150f3d23cac82ee0dc8ae907df62b98fe23c14a381ae01d25f3bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDBE6 16316 bytes
font_02_sfnt_off0001061d.bin
f1ba3cc2389fddc874ab9ae622efdd25a05c43285d8bcac866c14fb67b2cd199		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1061D 10544 bytes

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