Malicious PDF — malware analysis report

Static analysis result for SHA-256 2586f10aa8a08b7e…

MALICIOUS

PDF

75.7 KB Created: 2021-07-14 10:05:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 0b530947844ac5506b6669413d39160a SHA-1: 2b73d762e159e114623f3463632bf7a4a1e4084e SHA-256: 2586f10aa8a08b7e69f1ea0195f8ef160b8ba0c3d3d3ca5dfe6e302887911d65
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is a PDF document flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, 'coretry.ru', which is likely used for phishing or to host malicious content. No scripts were extracted, but the presence of the malicious URL and the detection signatures strongly indicate a phishing attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8802

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://coretry.ru/square?utm_term=wesam+gulf+properties+%26+investments
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60eca04be0ada229be5981fd/1626120267897/how_to_draw_pepper_potts.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee8a2b64675e3b9de56ca8/1626245675551/dislocated_arm_treatment.pdf
    • https://static1.squarespace.com/static/60aac4e0d5abe22cec5c4b22/t/60ee2834e7148d06bc6f73da/1626220596675/how_to_write_equation_with_slope_and_y_intercept.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60ec804bdd2ac847ff7e53d6/1626112075377/36329853258.pdf
    • https://static1.squarespace.com/static/60aac5994c6b1805bc4acbdb/t/60ed65ac9db072196a21b8e0/1626170796164/metotuxibugivoxemi.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_off0000c645.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC645 16792 bytes
font_01_sfnt_off0000de5c.bin
efc04277224ca2a6f465ba3ce4a7c4de2ad4ff2789fc0ccbfb8d22d91fc7e9f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xDE5C 10692 bytes
font_02_sfnt_off0000f6ea.bin
b7a44c4dd1407a9d35e58e6b0162f56e69b20937d562a2b46a706cd3ad64ad96		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF6EA 16420 bytes

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