Malicious PDF — malware analysis report

Static analysis result for SHA-256 76307bce9bf3eee3…

MALICIOUS

PDF

73.9 KB Created: 2021-07-14 10:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d726ddb65edb6abc75558caa3e9fa081 SHA-1: 9cd8209103f65b7bd8ccd4550d66f0bb1b5788e7 SHA-256: 76307bce9bf3eee3dfc430487251f6ab76873de07de1e1cacb651680a6aa1e2e
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ClamAV as malicious and a ML classifier indicated a high probability of maliciousness. An embedded URI points to a URL that appears to be a lure, disguised as a product review, likely intended for phishing. No scripts were extracted, but the PDF structure and embedded URI suggest an attempt to redirect the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7395

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/sq/ugae/~3/UkUWPC8UKDU/square?utm_term=accutire+ms+4021b+digital+tire+pressure+gauge+battery+replacement
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60ec8106ad4a1a22a3e72971/1626112262472/32285286311.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e90437309bd63f3d84f2cc/1625883704034/33500377870.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec866cdd2ac847ff7edd74/1626113644808/asis_protection_of_assets_manual.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_off0000c00a.bin
fdc88e8ed29d75b06a4718cb232920c4ed9fbbd5ed5e20afac9e5a5d7838a553		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC00A 11444 bytes
font_01_sfnt_off0000dad5.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDAD5 16792 bytes
font_02_sfnt_off0000f2e7.bin
655ec4f8436f0f6cd552f6116489cdc60775d478d2f007b426062e3d403c3522		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF2E7 15768 bytes

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