Malicious PDF — malware analysis report

Static analysis result for SHA-256 a534a9e65830ef0a…

MALICIOUS

PDF

464.8 KB Created: 2021-07-18 08:04:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: dec0f162e962f60669319e34b3689c45 SHA-1: fff41e95db2f8ba14c65fccb52cf923f36fb3653 SHA-256: a534a9e65830ef0a98694c5fbde515edcb1ddc5371b3842a0769c161d67d3679
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as a phishing trojan by ClamAV. It contains embedded URLs that point to external resources, suggesting an attempt to redirect the user to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a likely phishing or malware distribution attempt, aligning with the 'Spearphishing Attachment' technique.

Machine Learning

  • Nyx PDF Classifier clean score 0.0680

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/nCRFBnYrBHY/square?utm_term=physics+the+study+of+matter+and+energy+is+a
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e85023a6b516753cf509e3/1625837603874/best_gba_for_android.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60edbaddb7801d23018f36e6/1626192605730/i_am_talking_to_you.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ee9163588fb5669518f222/1626247523207/three_kinds_of_muscle_tissue.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f109acc699444e2e40a20c/1626409388382/33160222412.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60efd9b83db90d3c356e5f1b/1626331576728/43233297521.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eff2448fff8309feb8ea2f/1626337860477/vazotasavujututinusonaxew.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_off0006d220.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D220 16792 bytes
font_01_sfnt_off0006ea37.bin
a28e1cc375e8bae01ab3199c025835be401a97f857e0c3b63df8f9c9dec2a6b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EA37 11092 bytes
font_02_sfnt_off000703c0.bin
34a4bab3941cf1a5ba9da2237c607b284407a5c6a3b2f8f2ef7dd0c66e066a96		 pdf-font-stream PDF embedded font (sfnt) at offset 0x703C0 18744 bytes

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