Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8692612f11d14b…

MALICIOUS

PDF

99.6 KB Created: 2021-07-17 02:51:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8974e828ac720ddfe442e5a0eeb7e4c0 SHA-1: c794ce0ce0c404c1a8555f9a0e267bd7247625e8 SHA-256: 9f8692612f11d14bee9d7511a3221bb3179c621718a1a17d698ad7536903c5ab
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains embedded URLs that, while currently flagged as benign, are presented in a context that suggests a lure. The PDF structure itself is malformed, with duplicate object bodies, which is a common tactic in obfuscating malicious content. No scripts were extracted, but the presence of embedded URLs and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3328

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/AG-UZpNbJGc/square?utm_term=straight+face+copy+and+paste
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec7b3e12c1416d2f19eab0/1626110782430/50_most_annoying_songs_ever.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e7de1d23621b4743e42e2f/1625808413254/print_to_option_not_available.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edbb0fd7feee1d98d6ef4a/1626192655836/guzexoze.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fe11.bin
e23d892254b09d032d77f2ac25fe8c38a4782199db39fdd325c3195a5504c1d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFE11 17868 bytes
font_01_sfnt_off000117fd.bin
13afef27d5584a461573c5c1b98c2c1f43fee17dcf303c2e6662f0f3691ccb22		 pdf-font-stream PDF embedded font (sfnt) at offset 0x117FD 11044 bytes
font_02_sfnt_off00013172.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13172 16792 bytes
font_03_sfnt_off00014984.bin
60f3ad62577f8ef8898101d3a8cccfceb02a09fff34349d4d118dcf09b214f08		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14984 21808 bytes

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