Malicious PDF — malware analysis report

Static analysis result for SHA-256 c031e6bab1bca90d…

MALICIOUS

PDF

80.4 KB Created: 2021-07-19 10:54:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: b66c87efd2b5291764cc66020f0dd9e8 SHA-1: e8c28ac5958c901839f0d94b8a2af5aae375ad39 SHA-256: c031e6bab1bca90d2397482dbe6f0a460b1fe6a37c691bfb6ad0fb8eb79db53c
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as malicious and a machine learning classifier. It contains embedded URLs, one of which is https://feedproxy.google.com/~r/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=who+is+apryl+jones+dating. While the document body is heavily obfuscated, the presence of these indicators suggests a phishing or scam attempt, likely delivered as a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8584

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/razvivatel/yapz/~3/0YvHz_IItD0/square?utm_term=who+is+apryl+jones+dating
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ee7239bb85ab7f02c016db/1626239545656/you_are_all_i_need_to_get_by_aretha_franklin.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f34cf2db752c5e49aba1a8/1626557682547/74167292967.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f31a4404a1d9701798b28b/1626544709115/vozubod.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f1fad44bf0c342b0dae5e2/1626471124132/kegozigomejexatosinu.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f1e58ed2391863f5c0be6b/1626465679033/nothings_gonna_hurt_you_baby.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f0b7319627e70a9ac7c783/1626388273652/sezalojogiminira.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f3469e25edf123065a24df/1626556062864/79358199755.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_off0000d686.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD686 16792 bytes
font_01_sfnt_off0000ee9d.bin
9e4f7c60f3ea16b619908bb3946c35d345918ad0deb20fe3bc648f331e58923c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9D 10908 bytes
font_02_sfnt_off00010796.bin
97047e65eeff5ccac6c6973ab25539bb355606b09f593a2a6afe9d6ba10e6031		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10796 17076 bytes

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