Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a52f07c708f031…

MALICIOUS

PDF

73.4 KB Created: 2021-03-01 21:50:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: 044a9d3dea9e5175e7d5e47f3d5b5492 SHA-1: c9c2d480c709f816abcea1a1e4e20fa88db54c2e SHA-256: 94a52f07c708f031575eca803030525e1665d9004e7fa062ea96c629293ab886
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 or trojan. It contains numerous embedded URLs pointing to disposable domains, suggesting a link farm designed to redirect users to malicious content. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a high likelihood of this document being part of a phishing or malware distribution campaign.

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://dugedepap.ru/wix?keyword=everstar+mpm2-10cr-bb6+hose PDF link annotation
    • http://dujojiwasemob.mywebcommunity.org/27431706358.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369168/normal_5fe6ea7519c88.pdfIn PDF document text
    • http://carishr.com/327920858496t7cz.pdfIn PDF document text
    • http://prodit.space/zututudibutiria1czh.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425506/normal_602df2c73d3ad.pdfIn PDF document text
    • http://zoom-omsk.ru/lovonawazasomunelofojajuiu83r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373769/normal_5febf827bb6b3.pdfIn PDF document text
    • http://mitutepoka.medianewsonline.com/definicin_de_marxista_de_modo_de_produccin_capitalista.pdfIn PDF document text
    • http://liketime.fun/73860037205ofhu3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425235/normal_60270e3a331f3.pdfIn PDF document text
    • http://faceskinagainbeauty.xyz/15974365744xhfbw.pdfIn PDF document text
    • http://help-copyrightviolationhelpcenter.com/ms_project_software_free_download_full_versionc5eks.pdfIn PDF document text
    • http://bit-ipo.ru/what_type_of_character_is_rainsfordbx6q5.pdfIn PDF document text
    • http://zeboxagekej.sportsontheweb.net/61502395103.pdfIn PDF document text
    • http://blancer.xyz/83741654460bp64h.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4367278/normal_5ff59582e45e2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://saluwagasa.onlinewebshop.net/tunapupamipolinezukalep.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_off0000e04d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE04D 5812 bytes
SHA-256: 6cc84bfde930eecd208c46bc85ff73e5dc81399df9348757edbceaa1b5fe6119
font_01_sfnt_off0000f3f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3F0 10872 bytes
SHA-256: 50a302ccde4f1df55c69a7f38b03b74e1b6fba99f8cfe1675abc8f596bf2fe8a

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