Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e170c6c2e134e7…

MALICIOUS

PDF

133.4 KB Created: 2021-03-23 05:09:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d197319e58f0acce9534110ca822f084 SHA-1: 55553fd7f4c72f3de16724dccade35c16fa2e887 SHA-256: 80e170c6c2e134e70a6940383fc01262ed3e7ad054478bc5376578cc93d8dbd4
126 Risk Score

Malware Insights

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

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs pointing to disposable domains, indicating a link farm designed to redirect users to potentially harmful content. The presence of external URIs and the PDF_SEO_DISPOSABLE_LINK_FARM heuristic strongly suggest a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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/wix?keyword=puritan+religious+symbol
    • http://mitutepoka.medianewsonline.com/jasavopobonipomo.pdf
    • https://cdn.sqhk.co/tamaladafa/jBvx1Ma/mhst_the_adventure_begins_full_version.pdf
    • https://cdn.sqhk.co/sofilita/jfgjJ9G/52693135794.pdf
    • http://sale50.pro/big_little_lies_free_on_primehspbk.pdf
    • http://winoorama.site/roland_tb_303_original_price7es73.pdf
    • http://lebedugipul.mywebcommunity.org/74318072978.pdf
    • https://static.s123-cdn-static.com/uploads/4366032/normal_5ffc919217cf6.pdf
    • http://instapriz365.site/sizozobaziwitozefrnr4.pdf
    • http://helpcreditscore.info/wimazuvolubituwibupoptw296.pdf
    • http://dom-bita.org/descargar_geometry_dash_hackeado_par3oaeh.pdf
    • http://nanebaxexob.getenjoyment.net/49028878629.pdf
    • http://liwadaxezaf.getenjoyment.net/national_achievement_test_reviewer_for_grade_6.pdf
    • http://dayzcommunity.info/kevabuvubipakalabisejogujw66v9.pdf
    • http://quinzsy-studio.design/90269531921ty93u.pdf
    • https://cdn-cms.f-static.net/uploads/4415770/normal_60217130bae63.pdf
    • https://cdn.sqhk.co/fujotojaxob/ieYIiiK/dragon_quest_builders_3_star_dormitory.pdf
    • http://natlab.ru/beachbody_ultimate_reset_meal_plan_recipesoxuah.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://rulamiji.onlinewebshop.net/bupige.pdf
    • http://gototura.myartsonline.com/zazetokejowedikej.pdf
    • http://sipanokule.onlinewebshop.net/jokexidofuxoverajevi.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_off0001d1e2.bin
69d8c5d97aeed84c6ec75d483662e6d023cbd5ab1932978754fe4da55c2df2d6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1D1E2 5248 bytes
font_01_sfnt_off0001e3ad.bin
caae78e403d3ea49bf6410e77a624c8217acef1ebc8756143b9ae32b1644353d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1E3AD 10976 bytes

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