Malicious PDF — malware analysis report

Static analysis result for SHA-256 812ca5defdd0a0be…

MALICIOUS

PDF

76.1 KB Created: 2021-07-14 00:31:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f24f54176ae7090da43bfd39130df718 SHA-1: 6459f3de5fde762843bbdc2cbab2d7970d1ebe5b SHA-256: 812ca5defdd0a0be6528182d3c3964831735972c06f25b818543ca0d1c3057d9
106 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as a PDF document exhibiting characteristics of an advance-fee scam, as indicated by the 'SE_ADVANCE_FEE_SCAM_LURE' heuristic. The document body, though heavily obfuscated, suggests a lure related to prizes or parcels. ClamAV also detected it as 'Pdf.Phishing.Trojan'. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest potential for malicious JavaScript execution, commonly used in such phishing lures.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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/nCRFBnYrBHY/square?utm_term=java+collection+coding+interview+questions
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca82df9183728738a4251/1626122285952/lawitixejoxone.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee022336d517042364016a/1626210851942/rabuxamadesusagerora.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_off0000c91e.bin
59263a40552895bf8d6ecb8d3b41d13d41eb78ccb11d15d534e4376ee3f068c5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC91E 16568 bytes
font_01_sfnt_off0000f3a5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF3A5 16792 bytes
font_02_sfnt_off00010bbc.bin
790040434d0330246681c3866e38f48bd2d17edda96ba2460f7dd37e11c60c45		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10BBC 10932 bytes

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