Malicious PDF — malware analysis report

Static analysis result for SHA-256 d9beaceb68f72784…

MALICIOUS

PDF

74.0 KB Created: 2021-07-12 22:04:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bb9fa2dae06881bafc4c62dcefcad6ca SHA-1: a08b82630716c8f051f8e85bd439cbc4cb544362 SHA-256: d9beaceb68f72784a86545e2bb8e7160c9212250f8fccbd508b9d1f20b72ea33
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to lure the user into a phishing site. No scripts were extracted, but the PDF structure and embedded URI suggest a phishing attack.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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://archism.ru/square?utm_term=land+of+rest+tune
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e8fb6ac0906550d9098ff1/1625881450897/rapasetiloxa.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec90e00e7a3c5fba3e95df/1626116320696/basic_concepts_of_strength_of_materials.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_off0000c201.bin
e19badee9851516b9244158f50b1bea44b4d525c251ceb93fb76d1c1ad0575a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC201 17008 bytes
font_01_sfnt_off0000ed5d.bin
54fa96313d768cdf566bafdd126d140da58b6ffde87960d98c34286f1741002b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED5D 10264 bytes
font_02_sfnt_off0001049b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1049B 16792 bytes

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