Malicious PDF — malware analysis report

Static analysis result for SHA-256 f0a06b30db4f774a…

MALICIOUS

PDF

73.0 KB Created: 2021-07-14 05:34:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: bbbecce8bb04cd2841166a9bcaedcf92 SHA-1: bfde73096eb3301d6614677bc4645d09cec4c489 SHA-256: f0a06b30db4f774a6afc719fb720817bbd3abe4e88cdf44c6bcefc4dbbfe42f6
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URL pointing to 'queure.ru', which is likely part of a phishing attempt to direct users to a malicious site. No scripts were extracted, but the presence of the malicious URL and the ClamAV signature strongly suggest a phishing attack vector.

Machine Learning

  • Nyx PDF Classifier clean score 0.2153

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://queure.ru/square?utm_term=how+to+end+a+persuasive+letter
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e83cf4a9c4294aacf55071/1625832692331/meaning_of_ambitious_in_telugu.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_off0000bfeb.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xBFEB 16792 bytes
font_01_sfnt_off0000d7fd.bin
cfec1f6d9414f454764de57858825a2aeac905b0db5a3a1b7f6e38241ad8c0a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7FD 15248 bytes
font_02_sfnt_off0000feb1.bin
e7818683387d8511c194b03db7f2099b2560be6dfb5930fb632bc50cd908aa13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFEB1 10628 bytes

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