Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb18c77e86ebf9ae…

MALICIOUS

PDF

76.3 KB Created: 2021-07-13 02:40:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 8c0d834da2e284c2438bfefe194f8532 SHA-1: 34e8c74dc8b5faf7909c2758203894dbfead94f7 SHA-256: eb18c77e86ebf9ae00a7ab3c6060ee9b7f6a28a947a1069df51a63d44b649a5d
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URI pointing to 'garglob.ru', which is likely a malicious domain used for phishing or malware distribution. No scripts were extracted, but the presence of the malicious URI and the detection signatures strongly suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9125

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://garglob.ru/square?utm_term=the+quantum+leap+strategy+summary
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60ec78c95978cb5ccaa9b798/1626110153550/data_structures_and_algorithms_aho.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ecb6339c6b0e71d6d8efc6/1626125875905/magisterial_district_court_dockets.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60e7cc06a431ed42d2fb3c0b/1625803782392/97193690092.pdf
    • https://static1.squarespace.com/static/60aac52a97a1d73ddacfe14c/t/60ec8baf7e5cd11affce190d/1626114991884/latter_meaning_in_english.pdf
    • https://static1.squarespace.com/static/60bf69b23f3791685666e32d/t/60e76b1dae6cb774a92659f9/1625778973518/wevirugimujosegidunoj.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_off0000cbdf.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCBDF 16792 bytes
font_01_sfnt_off0000e3f1.bin
ef25562a9a00ea4f9a7e951cc46060fbf1afdefc7da80b1d9dff41e879d363a0		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE3F1 15948 bytes
font_02_sfnt_off00010d08.bin
8577137a460154e7590ec8edd772da34a878acab93900f07f34a4dfe4a37bc12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D08 10808 bytes

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