Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb7aea25549a387c…

MALICIOUS

PDF

76.2 KB Created: 2021-07-14 03:36:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 84f05cf8c856190f144871b7b4010f03 SHA-1: a05a1c1ec842e0797301a068c1b0547dbe284790 SHA-256: bb7aea25549a387c48bd2e1fc51c94b6c0d2be320c24a15afa805096ad8d3eca
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, though marked as benign, suggests an attempt to lure users to external resources. The PDF structure and content, combined with the heuristic firings, point towards a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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/iCUEKX862tE/square?utm_term=meaning+of+the+word+repertoire
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fdc737cb9044755e79c4/1625882055686/valium_10mg_side_effects.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee0207ea8d40126a1fcf3e/1626210823300/pujagokobidop.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecac9de7718717d765f2c0/1626123421354/automatic_termination_of_contract.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_off0000c950.bin
779d390b45cdaea4d605d1b9b31841a7f1906b0c27dbb79900ea4746e844c861		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC950 10644 bytes
font_01_sfnt_off0000e16f.bin
c661ada4e45b04cc5c6ebe2a32b4e4e6da2d0bd22766784bb769740dee20eda6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE16F 16764 bytes
font_02_sfnt_off00010cee.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10CEE 16792 bytes

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