Malicious PDF — malware analysis report

Static analysis result for SHA-256 f13f0e24adde732e…

MALICIOUS

PDF

79.5 KB Created: 2021-05-12 19:18:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 34d27f266aa2c68d3e0e140df2b3bf6c SHA-1: 2dcd62ff01bc6dc35fe099f98bf6541ba96b359e SHA-256: f13f0e24adde732e0fb52943eda970a4c3df4ffd1cd77b276c73a467e57108fa
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one pointing to a suspicious domain ('fokemale.ru') flagged by heuristics as a link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware delivery. Although no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect the user to a malicious site.

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=munchkin+weighted+straw+cup+leaking+out+of+straw PDF link annotation
    • http://fiwupejebibogu.sportsontheweb.net/zixaba.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4450426/normal_5fd091121481b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415944/normal_600fb1dd8d829.pdfIn PDF document text
    • https://doxavigefixo.weebly.com/uploads/1/3/5/3/135391607/jaxujoti.pdfIn PDF document text
    • https://wunepilupizuxo.weebly.com/uploads/1/3/1/8/131857535/7663346.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4503387/normal_5ff5b659425b6.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4490274/normal_5ffbeb051e6e2.pdfIn PDF document text
    • http://jakesubinosol.scienceontheweb.net/34520342527.pdfIn PDF document text
    • https://bitipobigexu.weebly.com/uploads/1/3/5/3/135399459/925751.pdfIn PDF document text
    • http://gekodejevotug.medianewsonline.com/xafelikotajadiganavoli.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://laroruteze.epizy.com/what_engine_is_in_the_3.2_ford_ranger.pdfIn PDF document text
    • https://247e77cc-5367-4382-8586-7c5891409f42.filesusr.com/ugd/2dbf5a_1baa57079d4749f6b72a1b9069e02e1d.pdf?index=trueIn PDF document text
    • http://zigatikix.rf.gd/danefusaxorazide.pdfIn PDF document text
    • https://7f06b679-e14d-4525-8955-d56a7cf6f710.filesusr.com/ugd/79e5df_861b9605b0b44022ab305c27df90e841.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/tuxutedi/calligraphy_alphabet_font.pdfIn PDF document text
    • https://s3.amazonaws.com/votawawo/6124020211.pdfIn PDF document text
    • http://vorasatijede.rf.gd/zeparapixofunut.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/58822942595.pdfIn PDF document text
    • http://gejulakan.epizy.com/rimisijusejawisenov.pdfIn PDF document text
    • https://e3e1c2aa-7f41-47b0-8c2f-d823cb48b857.filesusr.com/ugd/7598fa_c815dc5359d24694bd496ab912aec56b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/puretulenuza/73157531112.pdfIn PDF document text
    • http://tajiroxajesolut.atwebpages.com/dibejifekukopuvurekuze.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_off0000f48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF48F 5580 bytes
SHA-256: 2a2fa25bcd15aaaeb777e8cb87af9540d84aee482c8525c0a7f617f0cf2c7fee
font_01_sfnt_off000107b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x107B1 11480 bytes
SHA-256: e61912212c32754b7da56263eb1f2a0a9c398cb10059ecef6679823336f3f6fd

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