Malicious PDF — malware analysis report

Static analysis result for SHA-256 e27a432c094ad56a…

MALICIOUS

PDF

72.6 KB Created: 2021-07-13 18:49:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: cb5df9242c1092ba48fe65f8dbf82b16 SHA-1: 271dd906b791bc040f75261d7afe5f5e0e3e1cbe SHA-256: e27a432c094ad56a204337a8e45c8900855ba13acd8d0884ab66abf3c575ca31
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating phishing and trojan activity. While the document body is heavily obfuscated, the presence of embedded URLs and the PDF_URI heuristic suggest an attempt to redirect the user. The ClamAV detection name 'Pdf.Phishing.Trojan' strongly indicates a phishing lure, likely leading to credential theft or further malware delivery.

Machine Learning

  • Nyx PDF Classifier clean score 0.1829

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/razvivatel/yapz/~3/UQ8tT55rDuk/square?utm_term=chinese+lunch+recipes
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e812c448fdc25940432862/1625821892763/67723798441.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_off0000beb8.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBEB8 16792 bytes
font_01_sfnt_off0000d6cf.bin
ceed9cd8794a219faa328253939f405a5ba637c632a038c18929a1e8a07ee1f5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD6CF 10220 bytes
font_02_sfnt_off0000ed9f.bin
a0f184f4855e03c2cc4341845b6d4d4680a2b4b06bebbeed9c7d3b3b3813e0fb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED9F 16088 bytes

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