Malicious PDF — malware analysis report

Static analysis result for SHA-256 b56545f8ea5c0d9f…

MALICIOUS

PDF

75.9 KB Created: 2021-07-20 19:34:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3e0d8b7cf4f83f3e7ec3fd022e15c125 SHA-1: 64291c3114f0532854b2dd5e4247819e1b8af1aa SHA-256: b56545f8ea5c0d9f749817a9495959e27a8a8de924153de888b73be4e58be7de
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to a suspicious domain, which is likely intended to trick the user into visiting a malicious site. The authoring application 'wkhtmltopdf' is not inherently malicious, but the presence of the malicious URI and the high risk score indicate a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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://oniceh.ru/square?utm_term=full+movie+extraction+2020
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60e84400da9c5376a3b73653/1625834496921/relative_of_the_honeycreeper_nyt_crossword_clue.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60f57b880dbab00e46fc5fe7/1626700680434/options_as_a_strategic.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60f3c17cec5ad00cc094a27a/1626587516938/zovitirexotexax.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ee8bd3df274736e0afd472/1626246099631/xipuzavofofa.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_off0000c79e.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC79E 16792 bytes
font_01_sfnt_off0000dfb5.bin
809368836caa178b823ff58c3cbb83be244f6d5e355cb21585c696865de10948		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDFB5 10712 bytes
font_02_sfnt_off0000f850.bin
e572be601f568f42d2d6b3c2a7f7169ef032b3ae044f53619fa44303a5cdf8dc		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF850 16788 bytes

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