Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e4dd0cc00d4a783…

MALICIOUS

PDF

94.6 KB Created: 2021-05-02 11:05:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 545df14c94eacf74f06b4c383142eb20 SHA-1: 2df70855865e43cf9c53db084a3ded9c8ee5f8a6 SHA-256: 8e4dd0cc00d4a783ad8c970aebd7c8a870db27bbb1aadf212dfc25e35ae56369
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains a large number of external links, suggesting it functions as a link farm designed to redirect users to potentially harmful websites. The embedded content, though heavily obfuscated, appears to be part of a lure related to a "Cyberpunk red rules review". No scripts were extracted, but the PDF structure itself is indicative of a phishing or redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://gimoguvi.ru/strik?utm_term=cyberpunk+red+rules+review PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4408983/normal_5ffc69eccac74.pdfIn PDF document text
    • http://favunewesazut.sportsontheweb.net/7677882298.pdfIn PDF document text
    • http://lusudebela.iblogger.org/xosekokokokanawokatelofig.pdfIn PDF document text
    • https://cdn.sqhk.co/tusenepobam/g65gjFT/zekajaxepa.pdfIn PDF document text
    • http://zavolofa.mygamesonline.org/physical_science_grade_12_caps.pdfIn PDF document text
    • https://cdn.sqhk.co/kurutuxerodi/UjcN9ib/tiki_island_king_torch_stake.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/ic2gfgG/mario_andretti_racing_experience_chicago.pdfIn PDF document text
    • http://paxezot.getenjoyment.net/56357334979.pdfIn PDF document text
    • https://cdn.sqhk.co/rokatodupi/73hcuji/51279739820.pdfIn PDF document text
    • https://cdn.sqhk.co/kavesake/d8jcieL/3024415606.pdfIn PDF document text
    • http://xevamoz.mygamesonline.org/bovun.pdfIn PDF document text
    • http://buperutumabuluv.iblogger.org/22289045973.pdfIn PDF document text
    • http://padugozerur.22web.org/egyptian_cotton_flat_sheets_king_size.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425728/normal_5ff96209168dc.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://a1f0096d-76f5-425c-b826-5ccbd312c1bc.filesusr.com/ugd/8f8c07_3d402707cda64bdd84d6e311ef0fcc4f.pdf?index=trueIn PDF document text
    • https://8c56b32b-3398-45d6-9c0b-b55146621f16.filesusr.com/ugd/6924eb_ff0594c37cf44f4fa7c89090c87bad15.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/dowadotiju/vebela.pdfIn PDF document text
    • https://86f5e18a-8766-4ae7-b9bf-31430b627380.filesusr.com/ugd/911c12_f83c49e1336e4e1688e06f9b82000948.pdf?index=trueIn PDF document text
    • http://zeroxezubanalil.onlinewebshop.net/arquitectura_neoclasica_caracteristicas.pdfIn PDF document text
    • https://s3.amazonaws.com/zemigiduwagafu/85205539622.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_off0001349b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1349B 5104 bytes
SHA-256: 5eb1f2419ce7b1439dd1cc11d5811739acbd54e7ca837bdc68ee28f0d55b8a41
font_01_sfnt_off00014619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14619 11424 bytes
SHA-256: c6bfb47b45ba123d26c2a8fb4f1d10b0128e5461bda4b1e6b52635b33d8d506f

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