Malicious PDF — malware analysis report

Static analysis result for SHA-256 917aba45be82415f…

MALICIOUS

PDF

78.0 KB Created: 2021-07-17 20:11:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 2c0e0b42dc41ade7e934f31da5131d84 SHA-1: 25c86804f444d802b14224af2b1b838e12f5592b SHA-256: 917aba45be82415ff9039081ac79cad39513f4c73b730328f776ac22c208445f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified by ClamAV as 'Pdf.Phishing.Trojan-d2528dad23a95d95-10044376-0', indicating a phishing-related threat. Although no executable scripts were extracted, the presence of embedded URLs and the nature of the ClamAV detection suggest the PDF is designed to lure users into clicking malicious links or downloading further payloads. The file's metadata indicates it was generated by wkhtmltopdf, a tool sometimes abused to create malicious documents.

Machine Learning

  • Nyx PDF Classifier clean score 0.2489

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/XMoLd4EPXkg/square?utm_term=harry+potter+and+the+half+blood+prince+rupert+grint PDF link annotation
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f17e8e2c92ee1ddde16fd5/1626439310104/jopag.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60f06f0191b8e868d288652f/1626369793186/80301781716.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

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cf82.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCF82 16688 bytes
SHA-256: 8f5f8049868e07879fb1994f741144f78b0ca49ba90d90fb77f949b44a205a20
font_01_sfnt_off0000faa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAA6 11076 bytes
SHA-256: 3d15c448b8cca33cabfe4aed218252d7ec81f4ee8b5af5ffb3449013c5e363bb
font_02_sfnt_off000113e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x113E5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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