Malicious PDF — malware analysis report

Static analysis result for SHA-256 89ebfb794114d34a…

MALICIOUS

PDF

99.2 KB Created: 2021-02-19 12:10:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 0bacb967da191b5c95673222fd519cca SHA-1: 58d61cd97a078918f3ccd6bab8aae35e4c3599a5 SHA-256: 89ebfb794114d34a7c29d197388ac25bc20b694e19b8fad15eba8cd7f0dcaed3
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ML classifiers and ClamAV, indicating a phishing or trojan payload. It contains numerous external URLs, many of which are hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The document body, though heavily obfuscated, contains keywords related to game mods, likely serving as a lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?utm_term=crusader+kings+2+warhammer+geheimnisnacht+mod+download PDF link annotation
    • http://jetodubiropev.iblogger.org/all_bumblebee_transformers_toys.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367294/normal_5ff6a93baedae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483587/normal_6011b874dfeaf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407997/normal_5ff970b3d758a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403685/normal_5fdbd4b34947b.pdfIn PDF document text
    • http://gezilobogobig.22web.org/sonirazokoroxipusutuzokeg.pdfIn PDF document text
    • http://mazanatur.space/65849678472iyvbd.pdfIn PDF document text
    • http://milafikolume.iblogger.org/43861198221.pdfIn PDF document text
    • http://curvepreloved.com/9_months_that_made_you_episode_1_summaryqsilm.pdfIn PDF document text
    • http://bujufamamaw.22web.org/cbse_full_form_in_telugu.pdfIn PDF document text
    • http://qupieasy.online/turnover_intention_scaleomotc.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420438/normal_5fcedb4a313b7.pdfIn PDF document text
    • http://gramnews.xyz/4570490875aq58r.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nogapovo.rf.gd/likumelagin.pdfIn PDF document text
    • http://nalikala.epizy.com/night_begins_to_shine_music.pdfIn PDF document text
    • http://zuronixo.rf.gd/76082209256.pdfIn PDF document text
    • http://midowadijurufak.epizy.com/adverb_clauses_of_contrast_worksheet.pdfIn PDF document text
    • http://pazixurofuni.epizy.com/exerpeutic_therapeutic_fitness_folding_bike.pdfIn PDF document text
    • http://napipipazapuka.epizy.com/motexeruz.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14321 5544 bytes
SHA-256: 77e26f4cf48a229ff42bb25bb7042f52d6fe5bcb64c63f6b060edc155608c900
font_01_sfnt_off000155e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x155E6 12300 bytes
SHA-256: 5613c7852b43f2ad174726daa287890d047e46a66e89bdc1eca9118dd007691b

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