Malicious PDF — malware analysis report

Static analysis result for SHA-256 9065bcb11df25599…

MALICIOUS

PDF

78.3 KB Created: 2021-07-16 13:31:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: f1d74ca34ce5bf78dc5d9236f64cdf18 SHA-1: 3d4e92b8081c283aff3dc86d641b48a4fcc75d7f SHA-256: 9065bcb11df255993535b3b6aa18c3bd6b7e50e7819dacedbdec4a8a9ee5f7f4
86 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The critical ClamAV heuristic indicates this PDF is a phishing or trojan variant. The SE_CALLBACK_LURE heuristic further suggests a callback phishing or tech-support scam, where the document likely prompts the user to call a fraudulent number. While no scripts were extracted, the presence of embedded URLs and the overall detection pattern point towards a malicious document designed to deceive users.

Machine Learning

  • Nyx PDF Classifier clean score 0.1454

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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/sq/ugae/~3/u8n3KCQdUYc/square?utm_term=120+data+science+interview+questions+pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee52dd588fb56695160eb8/1626231517984/one_piece_stampede_free_full_video_english.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e7a2557e45264421f58566/1625793109721/secure_email_outlook.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_off0000d102.bin
dda8e7760c829ac29f25de30ffa94f084196a5c4a3a86034f8f81d29829ba2a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD102 16304 bytes
font_01_sfnt_off0000fb22.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFB22 16792 bytes
font_02_sfnt_off00011339.bin
cdd4cd8b28488fab2ddd99df7f54a84be9512e6c66d10492bf7d78411d641bab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11339 11160 bytes

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