Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f540da331f73aa4…

MALICIOUS

PDF

79.4 KB Created: 2021-07-12 23:23:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: c39928d5d041398c8a4f24b568af3d32 SHA-1: 7c32d569e1ffebf14f4df8f305c0d42e1f126590 SHA-256: 8f540da331f73aa48d9c65e0783a69b00582b166a7968fba67e1791cb049e264
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected as malicious by ML classifiers and ClamAV, specifically flagged as a phishing trojan. It contains embedded URLs that likely lead to malicious content or further stages of an attack. Although no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to external resources, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6556

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/sq/ugae/~3/iYdez4bKglI/square?utm_term=6+letter+word+that+starts+with+w
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e895c174c9732dd4b02c5a/1625855425844/cat_meows_after_pooping.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec7fce5f604029b9910c81/1626111950746/seven_deadly_sins_full_episodes_english_dubbed.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ec8b9a54a52c186ce5d799/1626114970399/69063761765.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_off0000d50e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD50E 16792 bytes
font_01_sfnt_off0000ed20.bin
9d80c4531c944c5350fe627ebd60ecb3b0a150f4459b254d39c49f06183f451f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED20 17296 bytes
font_02_sfnt_off00011a65.bin
9accf18bf486280482d6df0381c1eb9b1490c9af7ea89ab6ddbea901ab6b515f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11A65 10400 bytes

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