Malicious PDF — malware analysis report

Static analysis result for SHA-256 787cfd9a7e8a51c0…

MALICIOUS

PDF

73.3 KB Created: 2021-07-13 03:32:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9563117ceaf182aef71b4390f4022dcd SHA-1: 167cf4d194851443fdbc2ae4bc5ae842573619af SHA-256: 787cfd9a7e8a51c03a58b83091638affedcada46d812cffb5a1fbe9602a76a63
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document that contains embedded URLs, one of which is flagged as suspicious. ClamAV detection indicates this is a phishing-related trojan. The PDF structure and embedded content suggest an attempt to trick the user into visiting a malicious link, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier clean score 0.1797

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/AG-UZpNbJGc/square?utm_term=eamcet+mpc+previous+papers
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e8114980504e0a776bbe42/1625821513496/24735959702.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ecb2cd28cbe05054374727/1626125005874/nafametojijabuzemodokal.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_off0000bf84.bin
c0eaaab2d9e56f5361cb7663fa06043d6cf021d43e6c51ede9820b96de77ba97		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF84 10532 bytes
font_01_sfnt_off0000d795.bin
295868ff413f0b6771b8ff8864860bda2ab2987762dd941a5c69706edef01966		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD795 16172 bytes
font_02_sfnt_off00010171.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10171 16792 bytes

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