Malicious PDF — malware analysis report

Static analysis result for SHA-256 0e3b63ddcd2a4959…

MALICIOUS

PDF

74.5 KB Created: 2021-07-13 18:38:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 900fcca2b9923d57781039d3dffca429 SHA-1: 784e9351b0a2d6c3410b0d0061067f1ff482ffae SHA-256: 0e3b63ddcd2a495923030a93cea22300571309d9cafafc650294403d452ac039
66 Risk Score

Malware Insights

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

The file was detected by ClamAV as a Pdf.Phishing.Trojan, indicating a malicious intent to deceive users. The presence of embedded URLs, though marked as benign, suggests an attempt to redirect users to malicious sites or download further payloads. The PDF structure itself contains duplicate objects, which can sometimes be used to obfuscate malicious content.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2687

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/AG-UZpNbJGc/square?utm_term=biophysical+chemistry+cantor+and+schimmel
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e9461037cb904475611994/1625900560864/essential_thrombocythemia_definition.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e918fb563c1506a8b5dde2/1625889020106/what_does_it_say_about_you_if_your_favorite_color_is_blue.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_off0000c20e.bin
979ac5487a8a47d868a310c52f5b0f2a71d785834f846b1fd3b1d1fb662e91c7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC20E 16664 bytes
font_01_sfnt_off0000ed14.bin
dddcc6998532c11f353782ef4c26de0853e0be8157c1b146f9e9dd2e464ec2b0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED14 10948 bytes
font_02_sfnt_off00010659.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10659 16792 bytes

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