Malicious PDF — malware analysis report

Static analysis result for SHA-256 93f4ac680a8e5f8c…

MALICIOUS

PDF

78.1 KB Created: 2021-03-05 08:59:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: bbb2ace3575d46ed5a546fe3b8ed4f3c SHA-1: 9f30aed2721609029e26a3f09ef8182b7ddde068 SHA-256: 93f4ac680a8e5f8c4073278ec97e57e2468a5ee0c8a0b4e4077224a1f9dea00b
126 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, with one prominent URL pointing to a suspicious domain ('ponafet.ru') that is flagged as external. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates the PDF is part of a link farm on disposable hosting, suggesting a malicious intent to distribute links. ClamAV detection and ML classification strongly indicate maliciousness, likely related to phishing or malware delivery.

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://ponafet.ru/123?utm_term=organic+chemistry+reactions+calculator PDF link annotation
    • http://nupesupo.mypressonline.com/guia_de_gramatica_ingles.pdfIn PDF document text
    • http://tebogekememesij.mygamesonline.org/ziwota.pdfIn PDF document text
    • http://woxijakuzadajew.getenjoyment.net/duvode.pdfIn PDF document text
    • http://vknacruckalaikov123.xyz/bagasakokuboruzuhdeob.pdfIn PDF document text
    • http://copyrightprivacy.site/lectern_crossword_puzzle_answersjsuig.pdfIn PDF document text
    • http://kubosikavudux.mygamesonline.org/what_are_all_12_greek_gods.pdfIn PDF document text
    • http://kadaxejob.mypressonline.com/how_to_write_a_reflection_example_gibbs.pdfIn PDF document text
    • http://mebevevi.mywebcommunity.org/bolowaxitejumixuluno.pdfIn PDF document text
    • http://zobotalemogi.sportsontheweb.net/relion_confirm_meter_manual.pdfIn PDF document text
    • http://worameruvejaka.mywebcommunity.org/lepatadedavozodubuv.pdfIn PDF document text
    • https://cdn.sqhk.co/nomazotesi/0wGgjha/53216304859.pdfIn PDF document text
    • http://nout-prokat.website/xewirqwrrs.pdfIn PDF document text
    • https://cdn.sqhk.co/rusefijow/1njcUlP/kotenunesulubibomobuvumal.pdfIn PDF document text
    • http://nakalabaxis.mywebcommunity.org/fovevovigijazinotamewosa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/64817b75-a980-4b2a-b15c-fd169f309a70/weber_e-210_gas_grill_parts.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4375ad2a-de99-4fe8-ad46-dd05598480de/crown_xti_4000_amp_used.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d0dcd5ff-0ca8-47d3-bfe0-57a551a2d030/muzulofofufozu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/21395567-bfab-4b2f-87e5-83891055e23a/masters_in_business_analytics_ranking_us.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c91b1502-0225-4030-8cfb-92b64d1c2db1/posidesit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d4899ab-bdd4-4794-b942-10d452f72956/9_times_tables_worksheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d88d4d08-34e1-4b49-af50-5d7a13aca763/present_continuous_exercises_for_adults_questions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ca92ea45-6797-4936-a8e4-0f0ded7265c3/sat_math_2_practice_exam.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_off0000eff7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF7 5340 bytes
SHA-256: 7e246abc1427fba0877a744355bf38f504a4d8e0a7b1f8c2037d61f08c6ae66a
font_01_sfnt_off00010200.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10200 12112 bytes
SHA-256: 78c1e3b56a5936ff2dcfe8e78eb7625334b350abf33b13a9463ce4c331fbdc3f

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