Malicious PDF — malware analysis report

Static analysis result for SHA-256 417d0fb7cb10aa64…

MALICIOUS

PDF

80.3 KB Created: 2021-05-24 14:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 13f1c6dd96cfd58260e81550e3dab2a4 SHA-1: 56e29db3cb1c32ddef5d69467c23a7a3177b182f SHA-256: 417d0fb7cb10aa64e5f09ec0247ada188ac57c91b94340e6fe2b76d1952f3ee7
156 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_SEO_LINK_FARM, indicating it's part of a link farm designed to manipulate search engine results. It also contains an external URI pointing to 'ponafet.ru', which is likely a phishing or malicious site. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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 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.
  • 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/strik?utm_term=how+to+lose+weight+then+gain+muscle PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4374360/normal_5fdf80a14576e.pdfIn PDF document text
    • https://nedidibizexoba.weebly.com/uploads/1/3/0/9/130969065/poguliz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458829/normal_604dc00a1ff62.pdfIn PDF document text
    • https://patewolenapew.weebly.com/uploads/1/3/4/5/134525441/c259bed4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495854/normal_60527f2a704a5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4484612/normal_6066188d444af.pdfIn PDF document text
    • https://nomibazet.weebly.com/uploads/1/3/1/4/131437462/gemedobuli-serorol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369922/normal_606ea9bc63dad.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/c4a0d3ee-1a5a-4cdb-b1b0-32e01e7d2375/perseus_virgil_aeneid_book_10.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5884e43b-e374-437c-af4d-d64af865281e/tawoxazimevale.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7b836f8-0dbf-43c0-a334-d81d279a3952/91364308175.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/080d3145-5e3f-4190-ac98-9d75712af24f/oxygen_49_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5cd04a55-f0ba-49ce-a99e-5908089271d8/international_journal_of_legal_medicine_impact_factor_2018.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6192670b-07fb-47ba-872a-4fc50dd1f53a/77060088526.pdfIn PDF document text
    • https://s3.amazonaws.com/mipeboro/guidelines_diabetes_care_2019.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2b87fb72-d0f8-4aa0-80ae-2a2936141e97/nespresso_delonghi_lattissima_touch_restyle_silver_review.pdfIn PDF document text
    • https://s3.amazonaws.com/widofafane/where_is_equity_investment_on_balance_sheet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a265760-a628-445a-999d-e5f8978a0e0e/39141935259.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7baddce4-93cd-446f-a4ce-f7a4d6c59853/cajun_injector_electric_smoker_heating_element_replacement.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e86b06f-a41b-475c-ab8b-588d6c39ba22/how_to_build_trust_within_your_team.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/52a8d245-5f6d-4501-83fb-6105e1d65f6c/66286619837.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/711986cb-7e7b-49d2-9481-802306fe46a5/cookbooks_for_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/kabisebax/what_are_the_rules_of_active_and_passive_voice.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/317dc68a-be99-4c8a-bf7c-1375de06567b/tom_clancys_rainbow_six_quarantine_initial_release_date.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_off0000fcfe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCFE 5172 bytes
SHA-256: 7946d1820e0f61a80021407f3416715282a3025cd61801e5d155b545c5707d8d
font_01_sfnt_off00010e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E80 10916 bytes
SHA-256: c8bf3e3507889b3bc7ec3d5543da4b350a80063af7c72b2e5a03d32e6cc149c6