Malicious PDF — malware analysis report

Static analysis result for SHA-256 91adad3256df3b4a…

MALICIOUS

PDF

74.2 KB Created: 2021-07-13 07:42:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc063367d35874333e539c760b5ef373 SHA-1: 38e93d57e76afbedcfecbd26b60bc203dfedf5f2 SHA-256: 91adad3256df3b4ab0069bbd3c70adb0cb08d767b11642e29c625abde7d6bbc2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. It embeds external URLs, likely intended to redirect users to malicious sites for further exploitation. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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/AG-UZpNbJGc/square?utm_term=lord+of+the+flies+pdf+download
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ece95f64a4563c8f76c7c6/1626138975429/solve_simultaneous_equations_online.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ece96e4616123fc5f42321/1626138990763/96710455400.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e77b6cf1dc1e76d0a98a6e/1625783148472/lajiwofavatenubokidere.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8bd0b352a35235f1c94c9/1625865484000/new_word_of_active.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e857e52f24f427467aa51b/1625839589986/17881528614.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_off0000c043.bin
f47bb46cf89669a3dd79cfa951928ecef66e89aa178951bd12e189848d7fd707		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC043 10636 bytes
font_01_sfnt_off0000d894.bin
a017866eeca740eaf31caab84fc0dd77d4acf0f791992ec119806373cd2eb644		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD894 16896 bytes
font_02_sfnt_off000104b9.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x104B9 16792 bytes

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