Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fb86e7e8cd58e0d…

MALICIOUS

PDF

79.1 KB Created: 2021-07-20 14:17:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 524d956f79a2a16953f2be96754c0ebf SHA-1: 8a830c18efd41ce00a2926586a4dad7a1af11757 SHA-256: 7fb86e7e8cd58e0db7b6b88f7082f896f71e4ebf0f62627766687408b0a9cdd8
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. The presence of embedded URLs suggests it may be used for phishing or to redirect users to malicious sites. No scripts were extracted, but the PDF structure itself is suspicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8511

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/iXsW93xxTQA/square?utm_term=endep+for+pain
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f56f53ce637c258352a599/1626697555132/causes_of_tachycardia_in_newborn.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e932c5c4c1a734c5d76b1f/1625895621346/xinesotirekoxixipuzikep.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f47f07bf9212646c475b72/1626636039609/puwavimedegubareb.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60eca3029c874e71424af874/1626120962957/window_shopping_meaning_in_tamil.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f263011d35070742154e58/1626497793343/tavivowodifebopujovuw.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e8e7dbe6bd1231e604f83d/1625876443907/dubuzelun.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_off0000d7dd.bin
021033471969ef6b8e9e2db6d4fe9767a0ee0d48165fda783effc36ab0f0c9d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7DD 10164 bytes
font_01_sfnt_off0000ee96.bin
d1c8f6a1a047f04564690230af7959d2c83c1526bcecb522b2e9584dde5c5cb3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEE96 16348 bytes
font_02_sfnt_off000118ec.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118EC 16792 bytes

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