Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef695914541b569b…

MALICIOUS

PDF

77.4 KB Created: 2021-07-18 05:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 5f8b0822c66e315d994c1e714c0c077c SHA-1: 3fa5aefb9ac270b63c8e9d2752376946498fc6f3 SHA-256: ef695914541b569b663b54e86bef1ade7592ffa8e9a2e3a839a429a93b5c2bc0
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains an embedded URL that promises free Robux codes, a common lure for phishing and scam operations. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site for credential harvesting or other fraudulent activities.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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/NsX9ihectO0/square?utm_term=gift+card+free+robux+codes
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f0c065d1d8e65aae80de0c/1626390629890/2001_ford_explorer_xlt_owners_manual.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f35e5e4b68c137e69c753c/1626562142115/the_friction_and_lubrication_of_solids.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb3a7a5c02c6ff4dc8cd0/1626190759829/jesus_said_that_if_i_thirst_i_should_come_to_him.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60f3852c0b17490892107502/1626572076633/forenoon_meaning_in_marathi.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e8492fda9c5376a3b77c84/1625835823903/49535950519.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_off0000cdb6.bin
3b002be820b4e9fc787244d461bfaf6ef490d032a14ff634715c05ed1ca648bd		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCDB6 16592 bytes
font_01_sfnt_off0000f8d1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF8D1 16792 bytes
font_02_sfnt_off000110e8.bin
da464bc02a63a75570cc3961aafc7fd8fdf0931f9bcb834ec3c5bb03349744f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x110E8 10700 bytes

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