Malicious PDF — malware analysis report

Static analysis result for SHA-256 30451252a0936a20…

MALICIOUS

PDF

73.1 KB Created: 2021-07-15 09:55:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 74b5361f10aa314811d941247c4d9354 SHA-1: 6c39e6da632609bf1392eb739efba7a00048bf20 SHA-256: 30451252a0936a201fb2f7fa661e20d14ddad844d0928d350ecd36ffe37c7b2c
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a phishing trojan. It contains an embedded URI pointing to 'smidgel.ru', which is likely a phishing lure. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site, consistent with phishing tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.1797

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://smidgel.ru/square?utm_term=important+days+in+tamil+pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60edcb524c056a31b81914a0/1626196818128/fumubomumerafu.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee0503cc8e436e46696ac0/1626211587382/13027427779.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_off0000bf0b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBF0B 16792 bytes
font_01_sfnt_off0000d722.bin
fc630668fd2bdc7a24055069ad33ce898f837525e6a45073045678c6500e9f61		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD722 10592 bytes
font_02_sfnt_off0000ef3f.bin
1261e3461c84103bd56936e787ee5fae5996c739fbedb2f149fadb924d8a2ef6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEF3F 16148 bytes

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