Malicious PDF — malware analysis report

Static analysis result for SHA-256 5c874db140df59c9…

MALICIOUS

PDF

72.3 KB Created: 2021-07-13 08:44:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f92f2fa4b7bfccbe253c3c9268242191 SHA-1: 7d6a6b754589f5b9d7ed57befdd8a927de7bdd4c SHA-256: 5c874db140df59c99ecd84ae34303e5d5907faa1785464223a8a7bc55f057091
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV detection and the presence of embedded URLs indicate malicious intent, likely for phishing or malware delivery. Although the document body is heavily obfuscated and unreadable, the heuristic firings suggest the PDF is designed to interact with external resources. No scripts were extracted, limiting the ability to determine the exact payload or execution method.

Machine Learning

  • Nyx PDF Classifier clean score 0.1558

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/EjZ5HCEZs_A/square?utm_term=aage+aage+chahat+chali+mp3+download
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eca94951a87c5d75af73b5/1626122570049/letter_home_to_parents.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ecaf0da506f377f536779c/1626124046050/luther_on_repentance.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_off0000bbd2.bin
5638dc3550380d3e89d07825a89b98a5173905c02e8e13d1cfa38255b7dc07a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBBD2 10932 bytes
font_01_sfnt_off0000d4d2.bin
afc357438cc065f258c4206ec43dd04a9263e9b53f1039d498952c11fe76fce6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD4D2 15116 bytes
font_02_sfnt_off0000fbc6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFBC6 16792 bytes

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