Malicious PDF — malware analysis report

Static analysis result for SHA-256 e4f9f833327f8489…

MALICIOUS

PDF

80.2 KB Created: 2021-07-14 08:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9fff2dfd2a64b0e330959e9a8bb0c3ff SHA-1: e2c0f1d2a5636e98445bfab7f97fdd1e05adfa60 SHA-256: e4f9f833327f848928b23caab47d2441ebf71f6589428440aa1d80ae2eef5c70
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as 'Pdf.Phishing.Trojan'. Static analysis revealed an embedded URL, which is a common tactic for phishing lures or directing users to malicious content. Although the document body is heavily obfuscated, the presence of the embedded URI and the ClamAV signature strongly suggest a phishing or malware distribution attempt. No scripts were extracted, limiting the analysis of specific execution chains.

Machine Learning

  • Nyx PDF Classifier clean score 0.1467

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/gPkW7oTCsL0/square?utm_term=the+flowers+of+evil
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e95573b630645a0ef8e550/1625904499963/black_70s_trivia_questions_and_answers.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edd9fe24c32e4364b3c094/1626200574563/xisozunevasajoniwujiduji.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_off0000daa1.bin
25083c0ecea7f1bf69a70ea775375408fb84f6a3fa427818a35ba6b32cc27d0c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 10060 bytes
font_01_sfnt_off0000f137.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF137 16792 bytes
font_02_sfnt_off00010949.bin
dc4173af9de2138adf2265e7bd2929362e3871b1fba64b6e4146538338b77078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10949 17024 bytes

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