Malicious PDF — malware analysis report

Static analysis result for SHA-256 413302eb71187332…

MALICIOUS

PDF

79.2 KB Created: 2021-07-15 10:42:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8684b7b75400c9132a8a13266a8826f2 SHA-1: 798b930fe87292e2fbedd9ab13766586e1e390de SHA-256: 413302eb711873328e19d4de8865f9864c17c03bd8c6785bcdd4579fd13f8e28
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, disguised as a link to a free app, is a common lure for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/pL_UGxDroB4/square?utm_term=procreate+free+app+for+android
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8a57950202184f114cd4/1626114647507/wiposubofuvosiv.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee81c327fa864c7d156a4e/1626243524032/department_of_accounting_and_finance.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7eba64aaab0286a8b3d4a/1625811878599/wesanotodafuxepefezodezam.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_off0000d595.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD595 16792 bytes
font_01_sfnt_off0000edac.bin
414b342eaa9d8697d6abc10fd70546e986ee5225927602c656c22f6580407eb4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDAC 10400 bytes
font_02_sfnt_off00010549.bin
72af30e9f1cb42d168c39260a0019c38a83ffc4097b661a1c72a038d7fa23ea9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10549 16924 bytes

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