Malicious PDF — malware analysis report

Static analysis result for SHA-256 c7be24d871c49a03…

MALICIOUS

PDF

72.9 KB Created: 2021-07-13 17:06:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 083d4785fffe2985a598258f679378e2 SHA-1: a1402649653da89e9aff530f9674941ba8f814a3 SHA-256: c7be24d871c49a03ae160366769c5a378e28120d241f17968da96e18bb0950f5
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with the signature Pdf.Phishing.Trojan. The embedded URL, while flagged as benign, is part of a phishing lure. The PDF structure and embedded artifacts suggest an attempt to deliver a malicious payload or redirect the user to a compromised site, likely through a social engineering tactic.

Machine Learning

  • Nyx PDF Classifier clean score 0.1830

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/iXsW93xxTQA/square?utm_term=betrayal+at+house+on+the+hill+rulebook
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e8420f8c62796cdc6add3d/1625833999315/synonyms_of_relevant.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_off0000c032.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC032 16792 bytes
font_01_sfnt_off0000d844.bin
c11b791a1af5f553e209570add833badb356786d79d58d4942b0ffb6c4370b82		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD844 15488 bytes
font_02_sfnt_off0000ffbb.bin
e9b25e571470bc9b094a0e6417bdf4e1734e6e3e60c4792a34fb2ad32b790299		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFFBB 10704 bytes

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