Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e3ca3d8465e56a…

MALICIOUS

PDF

81.4 KB Created: 2021-07-16 19:12:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 836ffe2bef3ddc64c905216e65059c95 SHA-1: 8abcfc8ddf5f95014fc62cd41ac88eb0136798b3 SHA-256: 95e3ca3d8465e56ab28e089619a95006c2b8e2389cb87621b573c703b7edd90d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, likely intended to redirect the user to a phishing site. No scripts were extracted, but the presence of external URIs and the overall classification strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

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://pistant.ru/square?utm_term=woodpecker+great+spotted
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f0ad85c2692634f03c199a/1626385797419/write_the_answers.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e879a455269553136add73/1625848228448/worivov.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec7919c8b0d544b6d69218/1626110233195/pure_object_oriented_programming_language_list.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edbb5179643d1486f9abf6/1626192721405/48975927.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8fe89e370ac63228788f4/1625882250169/zozejasutofekamalegejefi.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60ec782ddbb514329fae131a/1626109997674/82104104519.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_off0000dd7e.bin
d3acac108f2414b550f9cd405bc54d1cab5361d8c62e9671fc6092376838e7fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDD7E 16924 bytes
font_01_sfnt_off000109ea.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x109EA 16792 bytes
font_02_sfnt_off00012201.bin
90b91792e6f9f3766f34d7f9c07c408fb283bf233e1e067d878615347bbd9b67		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12201 10532 bytes

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