Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cd8a215d5a5c510…

MALICIOUS

PDF

74.2 KB Created: 2021-07-16 03:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: d3f04d25f17a2ce2ba4754f9c69baedc SHA-1: 661eb95534c254798bb32a57a26b5970f2a522ed SHA-256: 8cd8a215d5a5c5100847dabf849f96abf93e14003f9ad0115d78ac87ae6f8965
66 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains an embedded URI pointing to a suspicious domain, which is a common tactic for phishing or directing users to malicious content. No scripts were extracted, but the presence of the external URI suggests an attempt to redirect the user to a harmful resource.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2592

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://ketchas.ru/square?utm_term=export+mysql+table+to+pdf+using+php
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60ee8244114e6b7b7dea915f/1626243652507/82492802453.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec8913bdd82073f6ffb6cc/1626114323363/50116878787.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_off0000c136.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC136 16792 bytes
font_01_sfnt_off0000d948.bin
f10484a72813478b6d24fabb5a1f8b91a7ba8cd6e234dfdf653d4bf40ba770ca		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD948 16128 bytes
font_02_sfnt_off000102c2.bin
642921d793651aa36e1cb790a8f6b4ca6a35c9f1a679b18945fa7413060f70aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x102C2 11528 bytes

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