Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e0cd707c522b632…

MALICIOUS

PDF

74.8 KB Created: 2021-07-20 21:07:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 86434609178d71d1007299110d39bf71 SHA-1: 59dc9856f0f75cda92de51836e238d5906504be2 SHA-256: 2e0cd707c522b632f7ede6b741a551044cc1f7bf7f653c4eb389ca72652d86fa
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious File

The PDF document was flagged by ClamAV as a phishing trojan and a machine learning classifier indicated maliciousness. Heuristics indicate a social engineering lure to install a browser extension or update, a common method for malware delivery. The embedded URL likely hosts the malicious payload or leads to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7703

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://catamma.ru/square?utm_term=idm+extension+for+chrome+download+free
    • https://static1.squarespace.com/static/60aac4dd19f082755c4e5c69/t/60f6abf5cf25774cb687c2ab/1626778613731/31297809476.pdf
    • https://static1.squarespace.com/static/60bf6cad3a95e91b59aa2418/t/60f17ca59014c44c5293b7b2/1626438821512/51579839467.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60f4935b6167905317e834bf/1626641243582/ratosedojufifube.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_off0000c67a.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC67A 16792 bytes
font_01_sfnt_off0000de8c.bin
871c8e08a7dd0230ef2baac6617ac1b42f3235bc86bcb7cb4e27fe5e096312f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE8C 15688 bytes
font_02_sfnt_off0001068e.bin
2cbd3a86114560f94c90a266d3fa7f35d074b5b77118fcd7ff39e4af7b62656a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1068E 10880 bytes

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