Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b6ddae228ce30e0…

MALICIOUS

PDF

83.5 KB Created: 2021-07-17 03:36:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20
MD5: f34016524b3bc44174e267e85f86708b SHA-1: f2736ffc941fc66ad27636186fca53c116170312 SHA-256: 9b6ddae228ce30e03e11540e92cdff0cb6eec4f13e1c04c531bb83c612386392
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The ClamAV detection and the presence of embedded URLs strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, PDF documents can contain JavaScript, which is often used to exploit vulnerabilities or redirect users. The embedded URLs, even those marked as benign, are suspicious in the context of a detected malicious PDF.

Machine Learning

  • Nyx PDF Classifier clean score 0.1542

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/AG-UZpNbJGc/square?utm_term=science+questions+for+class+10+with+answers PDF link annotation
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60eda2141374dd6a9a63f08a/1626186260743/puppy_very_tired.pdfIn PDF document text
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec95231951226b8b8c5c76/1626117411139/fmcg_products_list_in_india.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_off0000e48e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE48E 16880 bytes
SHA-256: de0d9eaae0bf230f1d2e9f7d731e3c15355361a1058cad27132ab940ef6bcaf5
font_01_sfnt_off00011082.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11082 11016 bytes
SHA-256: 2acd236d4a6bd986f446901f537db8656cc06443dbf20abb4beb280c2e547492
font_02_sfnt_off00012a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A26 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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