Malicious PDF — malware analysis report

Static analysis result for SHA-256 75ac260bdcce456d…

MALICIOUS

PDF

75.5 KB Created: 2021-07-16 05:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: e1f7eab6ef2000a6ec46ac4bb9554296 SHA-1: 6326b0f0785af01c077649ec8b915279fd97e10d SHA-256: 75ac260bdcce456d27521d558bce9f49521c2c3f043a595b4e104936f725b646
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ML classifiers and ClamAV, with a specific ClamAV detection name indicating it's a phishing trojan. An external URI pointing to 'wastran.ru' was extracted, which is a strong indicator of malicious intent, likely for phishing or to serve a secondary payload. No scripts were extracted, but the PDF structure and the presence of an external URL suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

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://wastran.ru/square?utm_term=skin+ppt+templates+free+download
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60edcfb41f6a9512286e595b/1626197940657/kingdom_of_priests_meaning.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9418a8ce0e10532d3afc9/1625899402554/60065055347.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e8c4ac4be6b65fb4b10468/1625867436191/52346953840.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_off0000c5a1.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC5A1 16792 bytes
font_01_sfnt_off0000ddb8.bin
93fa20efe46dcb7cfeecc688ce0585ffae90b45078fc701565c662295db5f888		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDDB8 10912 bytes
font_02_sfnt_off0000f6fa.bin
ccde7ac81cb4b4de8d014f3ecfab47eb8e6c7a4f55210329328ae259713b54d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6FA 16760 bytes

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