Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc3950024f062e36…

MALICIOUS

PDF

80.4 KB Created: 2021-07-13 17:11:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8e11f909322dfe9de6ea303252c00697 SHA-1: 2ad503c98bea356cab7325f2bb5878a93dac1064 SHA-256: bc3950024f062e36e60de6cc8c94faec4cb9e8690edc3199aab8684826835de8
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. An external URI was found embedded within the PDF, pointing to a URL that, while currently benign, is suspicious in this context. The PDF's structure and embedded content suggest an attempt to redirect the user to a potentially harmful external resource, characteristic of phishing or malware delivery campaigns.

Machine Learning

  • Nyx PDF Classifier clean score 0.1616

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/UkUWPC8UKDU/square?utm_term=the+catcher+in+the+rye+published
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ed22d7b8016c0d1ad389a2/1626153687934/paid_network_crypto.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_off0000d865.bin
cf10b15c5accf588f8311d38cb07aefedc9c462384596533cff505bdc747d498		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD865 16708 bytes
font_01_sfnt_off000103b8.bin
87f43337e493da62795caedb210b0bd499b00a0257e25cf8a62bd0893a6a5132		 pdf-font-stream PDF embedded font (sfnt) at offset 0x103B8 10808 bytes
font_02_sfnt_off00011c5c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11C5C 16792 bytes

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