Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ad0bb6ceb18f471…

MALICIOUS

PDF

134.5 KB Created: 2021-07-14 07:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 92ccd1822faf187ee9c25895a036265e SHA-1: d797b3c0504a6f2ca294f16d1d2434f0d9e89615 SHA-256: 9ad0bb6ceb18f4714f316f8234a9a72d9a3df9c8e510fedc4d6526e7f43cc49f
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a signature indicating it is a PDF phishing trojan. It contains an embedded URI that points to a URL, which is a common tactic for phishing attacks. While the document body is heavily obfuscated and unreadable, the presence of the embedded URL and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.0718

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://feedproxy.google.com/~r/razvivatel/yapz/~3/um1bUVUAM38/square?utm_term=17+jewels+incabloc+meaning PDF link annotation
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60edb4bb5860d606f484b1b9/1626191035618/zarugevolisemes.pdfIn PDF document text
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60eccec03b84fb5bce456982/1626132160978/tagalog_words_start_with_m.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_off0001b0e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1B0E3 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001c8f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1C8F5 17580 bytes
SHA-256: 50b3399b6765268ea79904c8157f3c49ea10bd82cf91e0e870a5c2a8af303cc5
font_02_sfnt_off0001f5bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F5BD 10736 bytes
SHA-256: e79b1c5ff7561c00625140ecf43fe183040543a26f6ac59c7c57a9d93a0a16fe

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