Malicious PDF — malware analysis report

Static analysis result for SHA-256 b762ce6cb945515a…

MALICIOUS

PDF

106.9 KB Created: 2021-07-12 21:38:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 27d9080771e0bad89b006e3fca5427df SHA-1: 1d57f493ffa611bda1c8dfe3da7991f649b217e2 SHA-256: b762ce6cb945515a13f1598a8519bf7d416268930df4c02ff1039e7d94056941
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document identified by ClamAV as malicious (Pdf.Phishing.Trojan). It contains an embedded URI pointing to 'wastran.ru', which is likely part of a phishing or malware distribution scheme. Although no scripts were explicitly extracted, the PDF structure and the presence of an external URI suggest an attempt to redirect the user to a malicious site, aligning with phishing tactics.

Machine Learning

  • Nyx PDF Classifier clean score 0.1391

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://wastran.ru/square?utm_term=polynomial+problems+with+answers PDF link annotation
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec8abeb6dedd3ae169918f/1626114751280/queen_bees_and_wannabes_free_download.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60e811d26e46386ca3c2cad2/1625821650257/high_and_low_context.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 4

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013cbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13CBE 10860 bytes
SHA-256: 711fb07d4ab852b46d612fde5714bb00f36470cbdf3852eddd47557a1d6874f3
font_01_sfnt_off00015573.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15573 19356 bytes
SHA-256: ea6a78a705586de65628f8c1982fa0e20ca4bcf544273fd4aa61f83f47e329ff
font_02_sfnt_off000187e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x187E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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