Malicious PDF — malware analysis report

Static analysis result for SHA-256 a401269e043e72b4…

MALICIOUS

PDF

108.3 KB Created: 2021-07-14 00:05:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: a4eeb158a114461bfabaa05d6a35d51c SHA-1: afd7c267c4dd9d0f69569d9aa52f12a948db7664 SHA-256: a401269e043e72b4b9cf9724a5a7761bf4fc83e7961798f4dff3dc706420e8c5
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. It contains an embedded URI pointing to a suspicious domain, 'smidgel.ru', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL strongly suggests a phishing attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.1439

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://smidgel.ru/square?utm_term=in+conformity+to
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec8445b8cbe518df57d725/1626113093896/39153239507.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_off0001438e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1438E 16792 bytes
font_01_sfnt_off00015ba5.bin
dc95c5de8113be072423de93c3bc3be0626df6bdcbb90735d4ed491d76e633a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15BA5 10056 bytes
font_02_sfnt_off000171f9.bin
410dcc1d7085be128546c5138580c407b4c01aef7b8d3e2c3c097e7afc417a4b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x171F9 20128 bytes

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