Malicious PDF — malware analysis report

Static analysis result for SHA-256 b330128042b5ff19…

MALICIOUS

PDF

77.0 KB Created: 2021-07-13 16:33:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d98d6a74ef49743b543e16feb2d15334 SHA-1: 1a607d30465dd1c55f271dda401040f528e570e6 SHA-256: b330128042b5ff1938c74f182f61961584c22b8957052bc03e6908ca8e2cfa06
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. An external URI pointing to 'allytemp.ru' was extracted, suggesting a redirection to a malicious site. No scripts were extracted, but the PDF structure and embedded URI are strong indicators of a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7483

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://allytemp.ru/square?utm_term=holt+world+geography+today+chapter+8+answers
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60e804f2e8ef4d41b4fc68c9/1625818354506/wumokosoberunetexote.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ecb945635fe735bd7f6d2a/1626126661352/eamcet_study_material.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e9603cdb8bb141badb0d6b/1625907260717/what_did_the_first_cat_look_like.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e93efd0cbdad4d3506bd9c/1625898749887/23544598973.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_off0000cbb1.bin
187ab6c7736606c0d55e954cfab85d5a0a5c4d962b5edf23815f90e780600722		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBB1 16536 bytes
font_01_sfnt_off0000f648.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF648 16792 bytes
font_02_sfnt_off00010e5f.bin
3598204128df57159972359052c961dee92a29c78ad80b5b9f723024b58337f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10E5F 11100 bytes

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