Malicious PDF — malware analysis report

Static analysis result for SHA-256 92790bbe89f3c1f4…

MALICIOUS

PDF

69.7 KB Created: 2021-02-28 10:50:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 20eece0d9734bb05052363bdb8b9142d SHA-1: 593eba7ccea95d043822c5bc153964de268ba75c SHA-256: 92790bbe89f3c1f4c481ee09e857bfa8494727a42f25f1ae6d630264facda850
126 Risk Score

Malware Insights

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

This PDF file was flagged as malicious by ML classifiers and ClamAV. It contains multiple embedded URLs, with a primary focus on directing users to 'fokemale.ru' and 'nebofimanigi.sportsontheweb.net'. The document body, though heavily obfuscated, contains strings related to a printer model, suggesting a lure for phishing or malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://fokemale.ru/strik?utm_term=impresora+brother+mfc-8950dw+printer PDF link annotation
    • http://nebofimanigi.sportsontheweb.net/resuramisenurezedaneg.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369651/normal_5fe216f499175.pdfIn PDF document text
    • http://dogalijun.scienceontheweb.net/46535227435.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4492259/normal_6002f6e67e828.pdfIn PDF document text
    • http://banquepopulaire-fr.org/rowurigajemomoie3m4.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/xabalaru/coat_of_arms_blank_shield_template.pdfIn PDF document text
    • http://nadadeze.epizy.com/33501336914.pdfIn PDF document text
    • http://resutujimi.epizy.com/26282630971.pdfIn PDF document text
    • http://vilepobafomunow.atwebpages.com/57233085198.pdfIn PDF document text
    • http://wonanikapudidak.atwebpages.com/pidinajupagil.pdfIn PDF document text
    • https://s3.amazonaws.com/kubafezin/9132144453.pdfIn PDF document text
    • http://xolavozezimodan.onlinewebshop.net/movies_like_catch_me_if_you_can_on_netflix.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_off0000d021.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD021 6180 bytes
SHA-256: e9a41175814087633bf7211a6cd9f7389b1ca2d78c782cc825c4a8af25ee77fd
font_01_sfnt_off0000e50a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE50A 11024 bytes
SHA-256: 6ff9ff9979665fbf0c510778fdcb30204db1bc7052f95a12ddc9720f4fc6777e

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