Malicious PDF — malware analysis report

Static analysis result for SHA-256 abd9f7787444e8ce…

MALICIOUS

PDF

74.6 KB Created: 2021-07-13 21:39:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 692015c6b367955bdcda7cdde095a8b9 SHA-1: 6caf711108c234c239e203a8007799218184202f SHA-256: abd9f7787444e8ce407b7c75fe5c0290f7970715e2b8dc6040f577096fa3b929
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 an embedded URI pointing to 'https://infrive.ru/square?utm_term=theme+of+the+story+the+holy+panchayat', which is likely part of a phishing or malware distribution scheme. No scripts were extracted, but the presence of the malicious URL and the detection signatures suggest a phishing attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7395

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://infrive.ru/square?utm_term=theme+of+the+story+the+holy+panchayat
    • https://static1.squarespace.com/static/60bf6bff0d8d387fecc8b153/t/60e7c48d86d8930991a52abf/1625801869691/5046094540.pdf
    • https://static1.squarespace.com/static/60bf6c89a2b0b938881bcf91/t/60e916d03f195e1e4035f9da/1625888464914/tawemij.pdf
    • https://static1.squarespace.com/static/60aac59fb7e9621e2f466549/t/60e819bd95719b356d954bad/1625823677117/zoxirufoxelibax.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_off0000c79a.bin
4daed61b3d71f0423526f05799fad3897b67b52b9615d9958e2e49502420cc37		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC79A 14596 bytes
font_01_sfnt_off0000ec4b.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4B 16792 bytes
font_02_sfnt_off00010462.bin
f107588af0e533b7eda9b4593393b744fb8a2cb4389d44eb29bc6f72f5a23270		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10462 10728 bytes

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