Malicious PDF — malware analysis report

Static analysis result for SHA-256 47639663270f7ca4…

MALICIOUS

PDF

73.9 KB Created: 2021-07-13 04:39:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 4ffc99a0be9e98fab1299a1d86a52c5c SHA-1: 5c5f14a5f97e5d55fa415c16283c1b0eb06829e7 SHA-256: 47639663270f7ca4a2c9d212c66f4601ccb3d18d69ab32c2edb9b3e9b3fb73c3
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains an embedded URI pointing to 'https://cructi.ru/square?utm_term=my+mom+and+her+two+hit+multi+target+attacks', which is a strong indicator of a phishing or malicious redirection attempt. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest it's designed to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier clean score 0.2401

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://cructi.ru/square?utm_term=my+mom+and+her+two+hit+multi+target+attacks
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a90338ed220952aab8e1/1625794819706/vawedila.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e82c457d3b385c94b8bc73/1625828421609/15922926543.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_off0000bd69.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBD69 16792 bytes
font_01_sfnt_off0000d580.bin
f752158db17d47654290c62085848dc8e1584e160d01e78dd3ae57f48e1e44fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD580 11200 bytes
font_02_sfnt_off0000ef5e.bin
d2b293e59755ac1f9afd3a843ec3868f9627f8b539d80b6c399bed086178381f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF5E 16484 bytes

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