Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bf16d218ab91045…

MALICIOUS

PDF

76.9 KB Created: 2021-07-14 00:22:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0764616b858695613d90c34a56f01b7a SHA-1: b29978706fc6485f20ff08bd0832c4e1f3f2fd26 SHA-256: 4bf16d218ab9104598558535328a3212a67c73289eda6bd95707b46cabc34a38
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URI pointing to a suspicious URL, which is likely used to redirect the user to a phishing or malware distribution site. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to exploit user interaction for malicious purposes.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7604

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://feedproxy.google.com/~r/razvivatel/yapz/~3/gOBB6uaVNRA/square?utm_term=books+and+chapters+of+the+bible+checklist
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60eca76fa1b53f2c226176b5/1626122095457/gijijaneni.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ee0368f6d8087912c29908/1626211177177/zironerekozemekoke.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60e94ab0e6bd1231e6093d60/1625901744439/instagram_captions_for_self_love.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_off0000ca5b.bin
9c7f6bca771a91df8e52e39c187e80ea29b031ac88e2487e8ce04abd7d1e4678		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA5B 16904 bytes
font_01_sfnt_off0000f699.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF699 16792 bytes
font_02_sfnt_off00010eb0.bin
af866b3cbc2a7656f0c6984a3245c56089046e9b3c6dc6b64f62fbbbb69a4833		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10EB0 11000 bytes

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