Malicious PDF — malware analysis report

Static analysis result for SHA-256 6257b9eccf168dd4…

MALICIOUS

PDF

77.4 KB Created: 2021-07-17 17:27:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 48bc5b17aaca5ea2a18932addfa8adf6 SHA-1: 0d5f5827b9c6b44b162b2f80136291e9146d92ba SHA-256: 6257b9eccf168dd4e255585461bf640fb70e6e83f8568ba388872f228db07a60
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs, despite some being marked as benign, suggests an attempt to redirect the user to potentially harmful content. The PDF structure and embedded objects are consistent with common techniques used to deliver phishing lures or second-stage malware. No scripts were extracted, limiting the analysis of specific execution methods.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8972

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/qQn0o4eTdIQ/square?utm_term=diversification+of+assets
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f25e050b17490892044d84/1626496517433/the_garden_society_afternoon_tea.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f2394cd68f3225904dbfe6/1626487116893/wrong_turn_3_full_movie_123.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f12d064bb49071de19c985/1626418439090/63901166014.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec912e4f2b1c51afa4d640/1626116398308/98125678656.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8c92651b7076defb34bd/1626115218773/free_printable_birth_certificate.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f2940ca8f65e35b6d1ae62/1626510348196/sapuxapuwanurorubovas.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_off0000cfe2.bin
59c22f2679b51ca267b2dbee2a9ea486e80f7d5d1a8e2d80656d9529ec36b8ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFE2 10352 bytes
font_01_sfnt_off0000e777.bin
e696ec317ce45dc7bab534077ae9b4ce92cf4d863a29b84c972e6d979a9d3a54		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE777 16384 bytes
font_02_sfnt_off000111dd.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x111DD 16792 bytes

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