Malicious PDF — malware analysis report

Static analysis result for SHA-256 743e80458f9ea59e…

MALICIOUS

PDF

89.5 KB Created: 2021-07-14 09:11:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: ec86fceeaafe4274de824a6f1a159da3 SHA-1: c56667ad2bcf411bf28cb1d7b931bfb0cb8bb02a SHA-256: 743e80458f9ea59e8d7fe0713ffec6f358b65f9f760b5631db19cd5b6961cf8b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier. It contains an embedded URL pointing to 'https://allytemp.ru/square?utm_term=what+to+pray+for+someone+who+is+dying', which is likely a phishing lure. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://allytemp.ru/square?utm_term=what+to+pray+for+someone+who+is+dying
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e935168ce0e10532d35057/1625896214845/defaulter_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eda5a85a30a704d0c0b739/1626187176290/gukomigo.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60edd3f4c6126f45c3e0e3a8/1626199028342/99912321380.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_off0000fb5d.bin
7f7b85734402f33def29e6f31994bb9d0d0013a44edbddbebc5debf6410607d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB5D 11092 bytes
font_01_sfnt_off000114f3.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x114F3 16792 bytes
font_02_sfnt_off00012d05.bin
c9e9068ea2b9a55589c99e4d8e250d704ff3b84dfb23e9cb0ef145b635a16180		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12D05 16768 bytes

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