Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3fa2715b1bba322…

MALICIOUS

PDF

81.8 KB Created: 2021-07-15 22:14:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9a22735c8c37316245489c08bc080a36 SHA-1: 50847c216bedd9868e71d2439f967d48b4db95f2 SHA-256: f3fa2715b1bba322c88b39a231ff022844c172c1dc4fe41e8e8bb6f8970a622c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URL that, while currently flagged as benign, was likely intended to lead to a phishing or malware distribution site. The PDF structure itself is also noted for duplicate object bodies, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/~3/9xivtwLAy4k/square?utm_term=2007+mercedes+e350+owners+manual
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee91b6fc191471fc70e8bb/1626247606407/cognisable_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca3b31d0b393375540789/1626121139673/41705091490.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_off0000dad0.bin
e5d313f7b085019fbdfc8098f8ae8ab78c9bc86056f72834c59e32d28fe841b5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD0 17824 bytes
font_01_sfnt_off0001098d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098D 16792 bytes
font_02_sfnt_off000121a4.bin
1e306da0f6b595a4e26fefb617838a71f4b99fed090678164adc800ef5cd5b99		 pdf-font-stream PDF embedded font (sfnt) at offset 0x121A4 11028 bytes

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