Malicious PDF — malware analysis report

Static analysis result for SHA-256 fc8333d83a96cb74…

MALICIOUS

PDF

73.8 KB Created: 2021-05-08 18:49:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 267031395b9dd668c0cba6bc8c1362d6 SHA-1: a29aa6aa468a91515a91f4f014ddb4cfe434fee0 SHA-256: fc8333d83a96cb74ce8ad837e2aa78bcfaa1f9d7303634a33559462d71238719
126 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple external links, with one prominent URL pointing to 'bologen.ru'. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent, likely involving exploitation of PDF vulnerabilities to redirect the user.

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://bologen.ru/strik?utm_term=5+love+languages+study+guide PDF link annotation
    • https://cdn.sqhk.co/delopomixaba/NnRgfit/jilonerufes.pdfIn PDF document text
    • https://cdn.sqhk.co/fotenulutis/dkdgdxB/oconee_state_park_cabins.pdfIn PDF document text
    • http://blacklaser.ru/sukulipebabenixogepawafeuvno.pdfIn PDF document text
    • https://cdn.sqhk.co/ripowusaro/Rh7phbD/56902933684.pdfIn PDF document text
    • https://cdn.sqhk.co/tipefima/hawREgc/blank_engine_blueprint_sheet.pdfIn PDF document text
    • https://cdn.sqhk.co/nananava/6is8Cjq/xarenobalibozejalani.pdfIn PDF document text
    • http://namedaun.fun/4724539475kjki1.pdfIn PDF document text
    • https://cdn.sqhk.co/vizoxaxijojo/djeogd8/chocolate_pudding_recipe_easy_and_quick.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/Riit8GO/pitbull_redboy_rascal.pdfIn PDF document text
    • http://mirror-x.org/literary_criticism_an_introduction_to_theory_and_practice_free_downloaduj324.pdfIn PDF document text
    • https://cdn.sqhk.co/foxenikap/jdbujiR/event_promo_video_template_free.pdfIn PDF document text
    • http://comp-arenda.site/desca_consortium_agreement_template5jonl.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/mefonevimimix/46019451970.pdfIn PDF document text
    • https://s3.amazonaws.com/mubefula/61231989974.pdfIn PDF document text
    • https://s3.amazonaws.com/mogipegi/a_beginners_guide_to_day_trading_online_2nd_edition_ebook.pdfIn PDF document text
    • https://s3.amazonaws.com/fusopoxipo/riwisula.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3863cd4f-218f-4c1f-9d8f-a1f07fc6d5f2/what_does_nolo_contendere_mean_in_texas.pdfIn PDF document text
    • https://s3.amazonaws.com/xidazeze/bethesda_tireoide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/22864168-414e-487f-8a84-b0c93863b931/13091024256.pdfIn PDF document text
    • http://fegozovot.rf.gd/2030506831.pdfIn PDF document text
    • http://kutuwawelozekot.rf.gd/fewufunukavubobamisegukun.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_off0000e4d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE4D5 5088 bytes
SHA-256: 4570b86fd80bb25d25d9b1d9109c06158e1a2785968c9dd97617f752c1c6480f
font_01_sfnt_off0000f642.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF642 10672 bytes
SHA-256: 87ed91c58270bf8740c63ff0b239f7ac9f83d52762c9f458fa9cfe45d353c7fb

Open this report in the interactive analyzer, or submit your own file for analysis.