Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ed087186e9c4a7f…

MALICIOUS

PDF

75.8 KB Created: 2021-03-24 12:11:38 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 86f91d43a3f7b7ce1a4e886e465465da SHA-1: 22c790b23406bf06ab558df1904aa2e066877cfd SHA-256: 0ed087186e9c4a7f7749542f0fb34a1476bfa9afcccd2d7123a239816fcd7163
126 Risk Score

Malware Insights

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

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, with one specifically pointing to 'gimoguvi.ru/strik', suggesting a phishing or malware distribution lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' further supports this by indicating the PDF is part of a link farm on disposable hosting, designed to obscure the true destination.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 5

  • 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 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=the+republic+for+which+it+stands+audiobook
    • https://static.s123-cdn-static.com/uploads/4469359/normal_5ff3d7bf9f5fa.pdf
    • http://gdztut.com/89715245195ar6e.pdf
    • https://cdn-cms.f-static.net/uploads/4387711/normal_601755b9b62c4.pdf
    • http://micrometer25bill.site/46286885989x5o5s.pdf
    • https://cdn.sqhk.co/toxinize/geXnShf/vector_field_definition_mathematics.pdf
    • http://idealsit.space/why_do_atoms_form_bondspe0jn.pdf
    • http://openplafond.xyz/basic_accounting_concepts_in_tamilbfk88.pdf
    • https://cdn.sqhk.co/zisazege/Fjb2Xje/doparim.pdf
    • https://wisemawuperu.weebly.com/uploads/1/3/0/7/130738751/bereniw.pdf
    • https://buvupoxiku.weebly.com/uploads/1/3/4/3/134329971/zaxekup-tekibezetudozo.pdf
    • http://axecheat9.xyz/autocratic_leadership_literature_reviewcs71z.pdf
    • http://tejovotemikodes.getenjoyment.net/6028669413.pdf
    • http://mastera-saydinga.ru/keleboxigizofojixowurizobyvdas.pdf
    • http://frontglass.xyz/gejirisosal0id0m.pdf
    • https://mulunumidivopiz.weebly.com/uploads/1/3/5/3/135393794/619340.pdf
    • https://daregunomunozo.weebly.com/uploads/1/3/4/7/134723938/sovinekil.pdf
    • http://raisinsapp.pro/hp_officejet_pro_8500a_print_quality_problemsg78ol.pdf
    • http://kpupnov.pro/yamaha_timberwolf_250_specsrieaa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://taroveruwidiba.onlinewebshop.net/other_side_of_the_wind_welles_review.pdf
    • http://laxufazekez.atwebpages.com/6721426555.pdf
    • http://levapoloj.onlinewebshop.net/antigona_sofocles_livro.pdf
    • http://wolobugoxew.myartsonline.com/papuxu.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e9d5.bin
ddc3d039d860499095224d3261e39a360874fc1edc22667bf494272bb4d5cfef		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9D5 5488 bytes
font_01_sfnt_off0000fc87.bin
9f5d651e5d1a9b8f471a2b342ad77ac41577ffbba15b7465838907e7074e43f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC87 10396 bytes

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