Malicious PDF — malware analysis report

Static analysis result for SHA-256 1999d31a9cb80d49…

MALICIOUS

PDF

75.1 KB Created: 2021-07-15 11:16:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e0e32850cb94c6521c6b7b00a1f0eb1b SHA-1: 4ac8a67fbd450286614586867d668fbad2e7eba6 SHA-256: 1999d31a9cb80d499eb899ac9940fa5d84f1c23a372650f918360428b47bd24c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URI that points to a suspicious URL, flagged by heuristics as an external URI and an embedded URL. ClamAV detection and ML classification strongly indicate maliciousness. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a potentially malicious site, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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/uzX87CUNjRg/square?utm_term=white+wolf+with+purple+eyes
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60efe59e4980ba6b3b6d97a3/1626334622945/wixozetavepuw.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e837d2a431ed42d2ffc1ad/1625831378539/tenejisave.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed8ffe094bb21e9996b2c3/1626181630328/taxipog.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed8d7c493b4338208f29c0/1626180988681/maplestory_manual_patches.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_off0000c857.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC857 16792 bytes
font_01_sfnt_off0000e069.bin
a69bfba0f72240c3b60a9abbadc307663087d4489566d105bb0422ef542a9a99		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE069 15740 bytes
font_02_sfnt_off000108e6.bin
69bbc4634f23ae0f728e810acccb49c8c5787cb86eece3ff6cc7fda0f6c64106		 pdf-font-stream PDF embedded font (sfnt) at offset 0x108E6 10484 bytes

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