Malicious PDF — malware analysis report

Static analysis result for SHA-256 786f441e5166b10c…

MALICIOUS

PDF

74.0 KB Created: 2021-07-13 16:39:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cc1d1bab0dc0dc66e47439ebe7e10bee SHA-1: 77bf58f5f8043a2f9aa20e505638e88e611b86e3 SHA-256: 786f441e5166b10cd769038ddd0cde135e086af758809744851bed78fff64ca2
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected by ClamAV as Pdf.Phishing.Trojan, indicating a malicious intent. The presence of embedded URLs, although marked as benign, suggests an attempt to lure the user to external resources. The PDF structure itself contains indicators of potential exploitation, leading to the classification as a phishing attachment and exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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/UkUWPC8UKDU/square?utm_term=food+and+catering
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ed5f2364a4563c8f7cb0d6/1626169123146/best_names_with_nicknames.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e77ef27920a346d3d1a65b/1625784051134/vuxuf.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_off0000c680.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC680 16792 bytes
font_01_sfnt_off0000de97.bin
e6b0f4c705a0aeb7acd9b119cb25ec9bc30c8adaf8ba761e80f23af4a6b64ce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE97 10308 bytes
font_02_sfnt_off0000f5af.bin
bd63d6378eb0c368a3f34b52f17b6faed7865e6d8384737121e08e1abda6ad4e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF5AF 15404 bytes

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