Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e9063191fac0f66…

MALICIOUS

PDF

89.6 KB Created: 2021-04-08 23:10:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: d47c45e083b9a102af123675be81d0a8 SHA-1: b616098238fd8c5f209b37d7c82d02f2bbfcd555 SHA-256: 8e9063191fac0f661147500cfda3d5bc5ca7b370c87a5e96ea134ab2c35cdcc2
186 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm and by a machine learning classifier as malicious. It contains numerous external URIs, with a primary suspicious URL being https://gimoguvi.ru/strik?utm_term=what+does+dave+asprey+eat. The document body appears to be malformed or obfuscated, preventing a clear understanding of its direct user-facing content, but the overall structure strongly suggests a phishing or SEO manipulation attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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=what+does+dave+asprey+eat PDF link annotation
    • https://cdn.sqhk.co/lazimafuxuxi/ggjhXwY/36396285174.pdfIn PDF document text
    • https://wumifidadorubip.weebly.com/uploads/1/3/5/2/135298964/50d8f5ba.pdfIn PDF document text
    • https://laxaxaxiw.weebly.com/uploads/1/3/4/5/134528460/9337565.pdfIn PDF document text
    • http://mitedujonajezed.scienceontheweb.net/98725931136.pdfIn PDF document text
    • https://cdn.sqhk.co/wanevakaxuma/jgWjh6t/cairo_club_orchestra_gigs.pdfIn PDF document text
    • http://kinemulawaw.sportsontheweb.net/how_much_oil_does_a_2006_honda_odyssey_take.pdfIn PDF document text
    • http://vixegoxufareka.getenjoyment.net/mathematical_symbols_in_word.pdfIn PDF document text
    • http://momivegod.22web.org/23542108191.pdfIn PDF document text
    • https://gumijaxedug.weebly.com/uploads/1/3/4/5/134529094/9476b0c17204e.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/17f4ec81-672e-468d-aeb8-451f5ca426c9/18712183961.pdfIn PDF document text
    • http://pilosowopovobat.epizy.com/rooms_of_the_house_worksheets_for_kindergarten.pdfIn PDF document text
    • https://37bdae34-bb2f-403f-997c-54a7c09d9c06.filesusr.com/ugd/dc98cc_65c106de069747fc96ee5705b1656630.pdf?index=trueIn PDF document text
    • http://wajifinome.epizy.com/battle_royale_computer_game_no.pdfIn PDF document text
    • https://76c87692-cca9-4651-be8e-de6412dad411.filesusr.com/ugd/fdad67_e86dc13f91e9412ba84e705609f52653.pdf?index=trueIn PDF document text
    • http://lajiwebubunewe.epizy.com/walupexu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae59a996-4afd-46d3-9f70-80ed125f1492/debodutotibolabusoge.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e51cf468-fb82-4098-95a0-07afaa19a26c/fokumuko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c94af5f9-8343-4547-964d-f084ac06aa77/12569246373.pdfIn PDF document text
    • https://276658a2-c6b1-4a23-bc3b-56c82bce4278.filesusr.com/ugd/f9448a_87d0b37edb6b432cb0f94b8723651cd8.pdf?index=trueIn PDF document text
    • https://f8071fb1-33dc-4bb9-9fe9-292e0ca0d861.filesusr.com/ugd/253000_d4aee4105fee466a9975e303e54292d8.pdf?index=trueIn PDF document text
    • http://gakilasefit.myartsonline.com/buvutaterijexadipirovodu.pdfIn PDF document text
    • https://964beff5-d24f-450a-94e2-fa7e9faef44a.filesusr.com/ugd/61158f_f2be11a0b50347b0bb72eeade8e70390.pdf?index=trueIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000114c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x114C9 4824 bytes
SHA-256: 6cff8ec06de9ceb43a2b371e53c0572f6b72f3fa92e446c826d90d6c2785f841
font_01_sfnt_off00012557.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12557 10996 bytes
SHA-256: f21615060af18b8d88e1e36d1c6187d491b3a742a08a219a8e5383719a7f0bc8
font_02_sfnt_off00014b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14B01 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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