Malicious PDF — malware analysis report

Static analysis result for SHA-256 484a57232cc3058b…

MALICIOUS

PDF

68.9 KB Created: 2021-02-17 00:16:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4d1f90ae7b039db3cded0f107cb92b1 SHA-1: 7206593a4d114025a63a09a0ff5683662df2f67c SHA-256: 484a57232cc3058b876cda0ea00cc9b23b8b0ab5a565cf8ca39e88e06e6669af
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file is identified as malicious by ML classifiers and ClamAV, with a specific detection name indicating it's a phishing trojan. An external URI pointing to 'seumenha.ru' was extracted, suggesting a redirection or download attempt. The document body, though heavily obfuscated, contains keywords related to a guide, reinforcing the lure aspect. No scripts were extracted, but the PDF structure and external URL are strong indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://seumenha.ru/wix?keyword=synthweaving+guide+700
    • https://cdn-cms.f-static.net/uploads/4480393/normal_5fd676455a858.pdf
    • https://cdn-cms.f-static.net/uploads/4417312/normal_60268c663e6cc.pdf
    • https://static.s123-cdn-static.com/uploads/4459796/normal_5fc88f13b5790.pdf
    • https://cdn-cms.f-static.net/uploads/4425238/normal_5fd8b00a3ac27.pdf
    • http://xikizolux.22web.org/73376206668.pdf
    • http://moxufelomewiziw.iblogger.org/update_bios_gigabyte_ga-_g31m-_es2c.pdf
    • https://cdn-cms.f-static.net/uploads/4486743/normal_5fe8e7520a1dc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/mipizaju/moliperonomopulaviguvo.pdf
    • http://rawozenagi.epizy.com/kimidowipisikotalogotuwad.pdf
    • http://noxikemudenuma.epizy.com/calyx_point_10._2.pdf
    • https://s3.amazonaws.com/gedesisumi/njdot_complete_streets_guide.pdf
    • http://wedalavunobuwe.rf.gd/pesobizeg.pdf
    • https://s3.amazonaws.com/pusori/informative_poster_template_free.pdf
    • http://xobiluwova.epizy.com/ionic_reactions_lab_answers_labpaq.pdf
    • https://s3.amazonaws.com/gedesisumi/wekalapusawajev.pdf
    • http://zajemoj.epizy.com/theme_google_pixel.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://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d2a8.bin
17343f803243c6e9b189fb3e27afa96d9fa2b477729c79214040f23dd0300365		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2A8 5360 bytes
font_01_sfnt_off0000e509.bin
82917c6ca2779f054cbf28b6706255498c56968139e175f24ffe2e319f7b386f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE509 10140 bytes

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