Malicious PDF — malware analysis report

Static analysis result for SHA-256 d066480c839a1347…

MALICIOUS

PDF

85.5 KB Created: 2021-07-15 13:09:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 3d79e915903bf3c4756c4f2e894fe2e0 SHA-1: c84a6ce32598df37325fe5ff5346fac58442f1f3 SHA-256: d066480c839a13475045f13c0c8cbb4c5839ca9fbcfd79cd33b8b0c5504806f2
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains embedded URLs that likely lead to malicious content or phishing sites. Although no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit users by directing them to external resources.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6359

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/cEZ-xJcQpFE/square?utm_term=best+cyclists+2020
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60ec81338300fd66e1960608/1626112307902/navadudeluwukazijeg.pdf
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c9a4d93aeb546a139341/1625803172616/35559453484.pdf
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60edb715c7772f26c85385ec/1626191637830/liwenabulafalaxifipek.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_off0000ed50.bin
8e103333d8d143c8d8a7d18a11d1105d5a3a5a683d4ac5054be910eb3d7d4764		 pdf-font-stream PDF embedded font (sfnt) at offset 0xED50 18080 bytes
font_01_sfnt_off00011b9b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11B9B 16792 bytes
font_02_sfnt_off000133b2.bin
3edd3a077ac4661abf8cf8ed49a3c8433c168afa89dab4b6f9cb747df6abca15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x133B2 10148 bytes

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