Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcd58f8486bb168a…

MALICIOUS

PDF

78.4 KB Created: 2021-07-18 21:46:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d881cb97b2cb7dbd195a622e290bd21 SHA-1: 8020984745c87fc0c4d4ec67eeb250f69d37e0b5 SHA-256: dcd58f8486bb168ae2958081ef37f163f0b7099f1fc19d3f69cbef7e4ec78445
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV with the signature 'Pdf.Phishing.Trojan'. It contains an embedded URL that is disguised as a link to watch a movie, which is a common social engineering tactic to trick users into clicking. While no scripts were explicitly extracted, the PDF structure and the presence of an embedded URI suggest an attempt to redirect the user to a potentially harmful site, likely for phishing or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1658

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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/~3/4Ji06Fp1PxY/square?utm_term=watch+bride+and+prejudice+full+movie+online+free+123movies
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f430f8d68f322590617b6b/1626616057221/earthquake_resistant_design_of_structures_lecture_notes.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f1fac09fa9a87796d23692/1626471104985/open_all_pages_in_illustrator.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_off0000ce5a.bin
a902cd32826a9bb99dde0758ec8918e284866b8972c3a9a0e7ab496c6cab4f50		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE5A 11656 bytes
font_01_sfnt_off0000e9c8.bin
5cb85402c615d7166c20397bcad9ff55f8edbf25dc07ba5f942ada6c8919ec5f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9C8 16732 bytes
font_02_sfnt_off00011556.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11556 16792 bytes

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