Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea981492a3836575…

MALICIOUS

PDF

77.0 KB Created: 2021-07-12 23:07:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 50f79ecb4608f42d6cdb719269343064 SHA-1: 9c2f978a5656d09b65184f710a31248374e98a6b SHA-256: ea981492a3836575efc55e6e18a46e3402858ffbfcfba5f09cc1e6abafa46c36
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 URI that points to a URL which, while currently marked as benign, is likely part of a phishing or redirection chain. The document body is heavily obfuscated, preventing analysis of its specific content, but the presence of the URI and the ClamAV detection strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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=how+to+copy+a+pdf+image+into+a+word+document
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8890bab59613eccc2e759/1625852171694/28678373642.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e9063a92abcc18c4f4d30f/1625884218163/jomipumigusetesibogi.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_off0000ccaa.bin
0c8a4c63f37368b5fd5bc717a502a840fccef57745b5c4ed14a58399dffa07f9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCCAA 16128 bytes
font_01_sfnt_off0000f673.bin
5d9a2afbbecfc1407f1eab7471b5a205a588fca58ce24549703fc82f82bd52ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF673 11040 bytes
font_02_sfnt_off00010ff8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10FF8 16792 bytes

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