Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e642682267d1768…

MALICIOUS

PDF

76.1 KB Created: 2021-07-12 21:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 558fd857ea5cb2a9d14d79243f919899 SHA-1: b585ff296868b3af597a3db23d43182d6c5c724b SHA-256: 1e642682267d1768b1f05133886230f172327505f1fff20e9dc11713b92dc64b
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF containing an embedded URL that points to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7746

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=watch+the+adventures+of+robin+hood+1938+online+free
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ec88ca72e2584f2463d461/1626114251154/82465805460.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e774a8395393225d10b0a5/1625781416254/rogers_textbook_of_pediatric_intensive_care_free_download.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e811689ebc0053f31898cd/1625821544375/wpf_datagrid_paging.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ec836d3a853d606aec8758/1626112877756/foundation_of_information_technology_class_9_solutions_chapter_2.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_off0000c53d.bin
42622c3fb8b15bbec7f2460b2484099024af288212e186aa50c2b36866597625		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC53D 16776 bytes
font_01_sfnt_off0000f100.bin
652431eb3efc66803050e72e1057a4f0589b8cbe12c44def8fa254b29becf7a5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF100 11472 bytes
font_02_sfnt_off00010c2c.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10C2C 16792 bytes

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