Malicious PDF — malware analysis report

Static analysis result for SHA-256 917478832d6f71e8…

MALICIOUS

PDF

73.9 KB Created: 2021-07-15 12:20:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f7ebfe2a624bfcb00f615f03c862fdf6 SHA-1: fb9da0ad063aca2e8ce6aab55a8194baab09d826 SHA-256: 917478832d6f71e8445fbd7b1448ec9163d70e7ffb82466618fdbade3d83683b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan. Heuristics indicate the presence of an external URI, and the ML classifier assigned a high probability of maliciousness. While no scripts were explicitly extracted, the PDF structure and the presence of embedded URIs suggest an attempt to redirect the user to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8872

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/~3/1LSSs5qy-i4/square?utm_term=word+document+to+a+pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec808d6ad76c09748fec72/1626112141806/talipememis.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8d581bf13e579204bcab6/1625871745616/59956350581.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e7f4718f757b1ac4529549/1625814129680/kepimomevusixemadulixaf.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60edc9a4a9aa746350c9a8ea/1626196388876/quotes_on_brother_and_sister_in_punjabi.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee187502e0767984f0c276/1626216565729/how_to_get_optifine_in_rlcraft.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_off0000c2b4.bin
037a1940d1838ab25c0ce95a83ecf07836f0b7300a1d4ecbdd2cd73c397914d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC2B4 15968 bytes
font_01_sfnt_off0000ebb7.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEBB7 16792 bytes
font_02_sfnt_off000103ce.bin
a7af4f6f1ed461d58925b4e5c5dad5f8fb62f52a68ce61fecab009b4e462c0e4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103CE 10568 bytes

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