Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9e6ec997e4965f0…

MALICIOUS

PDF

80.3 KB Created: 2021-07-15 14:46:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 53f7bee42f84f90698bf98b5880dfab9 SHA-1: 34e562ae0520234214c8b33b41badde76493a7f5 SHA-256: b9e6ec997e4965f04c35b740a5feebd212bdb629f889ee373aef7455cdbaab9f
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 an embedded URI pointing to 'https://crewmak.ru/square?utm_term=sexuality+today+pdf', which is likely a phishing lure. Although no scripts were extracted, the presence of the malicious URI and the ClamAV detection strongly suggest a phishing attack vector.

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://crewmak.ru/square?utm_term=sexuality+today+pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e94dd5b68d8f0f4bf9a593/1625902549237/96828095029.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e8469ad580de0300b6601f/1625835162691/xokurakoxonozoxigejax.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_off0000d93e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD93E 16792 bytes
font_01_sfnt_off0000f150.bin
883a16b24c0c63928b62761d7df9bf1486e91b83ea16ca8ee0ebdd8cd50cbe6f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF150 17040 bytes
font_02_sfnt_off00011dc9.bin
f9af406e3960f293fe7d95dfc65809653d2c02260fdfd7a91bce8ff3d83bd83d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11DC9 10508 bytes

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