Malicious PDF — malware analysis report

Static analysis result for SHA-256 5a8911d890660a10…

MALICIOUS

PDF

119.1 KB Created: 2021-07-15 14:58:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a3ec6070eed4488bee7b657b3304b828 SHA-1: dbe09ee0dfaa202fae807db435b1252bfa38c083 SHA-256: 5a8911d890660a1011fc14b3a690e58f04cdd186e9a4a0e5f2e4c9264f927e70
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as malicious by ClamAV with a specific signature indicating it is a phishing trojan. It contains an embedded URI pointing to 'garglob.ru', which is likely the malicious destination. The PDF structure also shows signs of manipulation with duplicate object bodies, suggesting an attempt to evade detection or embed malicious content.

Machine Learning

  • Nyx PDF Classifier clean score 0.1007

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://garglob.ru/square?utm_term=good+effect+of+change+in+human+population
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f00c6a161c066054388bf1/1626344554757/does_coffee_with_cream_break_your_fast.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60f00b57bae8d04216d62212/1626344279374/76790605801.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_off00016c72.bin
8c1d2d17287844a48c432fe9892a0196d6bb906dad5073e5ba68bd1fc74a3274		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16C72 10940 bytes
font_01_sfnt_off0001856d.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1856D 16792 bytes
font_02_sfnt_off00019d7f.bin
2e9754d4a77acb27a0b6dfc1818d92539574b3863a6c62c3e7686dc01d084275		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19D7F 19256 bytes

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