Malicious PDF — malware analysis report

Static analysis result for SHA-256 84ee6546d2e0322e…

MALICIOUS

PDF

80.4 KB Created: 2021-07-20 15:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 49f05e18a3cb77057bac56862beb5a10 SHA-1: 84cb70c7f44463abe8dab7204a3f2eb89bd760b2 SHA-256: 84ee6546d2e0322ebadbed918a5382a44e840fe6daefaed4ee788e69a31ed6cb
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The embedded URL, although marked as confirmed benign in the provided context, was identified by heuristics, suggesting it was intended to be a lure. The document body is heavily obfuscated and unreadable, preventing a more detailed analysis of its specific content or purpose.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8666

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/UZrB20b2Dcg/square?utm_term=single+stage+rc+coupled+amplifier+experiment
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee1edeaa539923b583f7cb/1626218206108/92252141668.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f49e71b386920ff6daca96/1626644081207/xilanofenudixazu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e84cf830ecfa0852d53c68/1625836792684/3358748827.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f0c86c9014c44c528a6d76/1626392684788/sobes.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ee2ca3115d504d3a851154/1626221731106/52101044777.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e90ebf2210ba6bce116b24/1625886399262/sudagatepojorada.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8b19c3fb560d26f38f91/1626114841808/1_to_10_multiplication_table.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_off0000d572.bin
907680de44dd2a9f14b7815638fca332a5ab2eab948d4a85416b4e2bb0ee9e61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD572 11240 bytes
font_01_sfnt_off0000ef9a.bin
1308a15ba0911fac3447a95a3ccd7a1378387229907de768c86afbc1eca2e2ae		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF9A 17372 bytes
font_02_sfnt_off00011d41.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11D41 16792 bytes

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