Malicious PDF — malware analysis report

Static analysis result for SHA-256 911f59ce38af727c…

MALICIOUS

PDF

76.9 KB Created: 2021-04-02 07:19:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-02
MD5: 6e1596e9e382accd61fc4f7b1688741b SHA-1: 026f046f38c4cbedc1be14acc66074c04d720eaa SHA-256: 911f59ce38af727ce4602383be165d33dff87e23f314337c8afdc8dd2987de51
156 Risk Score

Malware Insights

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

The PDF file contains numerous external links, flagged as a link farm, and is identified as malicious by ML classifiers and ClamAV. The primary malicious URL is https://pelibifir.ru/123?utm_term=bosch+logixx+dishwasher+repair+manual, which is likely used to distribute further malicious content or lead to phishing pages. The document body, though heavily obfuscated, suggests a lure related to repair manuals.

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 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://pelibifir.ru/123?utm_term=bosch+logixx+dishwasher+repair+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4484355/normal_6007328f01cf5.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4423431/normal_5ff29d8dc850e.pdfIn PDF document text
    • https://xasigusuvenazuj.weebly.com/uploads/1/3/0/7/130739755/susajizupevima.pdfIn PDF document text
    • http://zegiwire.sportsontheweb.net/panasonic_conduits_catalogue.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379615/normal_5ff2beb626128.pdfIn PDF document text
    • https://zojolutavalo.weebly.com/uploads/1/3/5/3/135345328/05b8f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483070/normal_5ffc0ef7761e9.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4500199/normal_5ff0cf470e12c.pdfIn PDF document text
    • http://potuxoposutu.medianewsonline.com/studying_engineering_a_roadmap_to_a_rewarding_career_4th_edition.pdfIn PDF document text
    • https://vimiwakemimug.weebly.com/uploads/1/3/1/6/131606159/7853060.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/175431df-6f42-41d8-8c11-ad9939178448/cost_to_rebuild_mercruiser_350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d9b6c37-8b2b-4f88-81d4-de43787d5961/how_can_i_download_my_ti_84_calculator_for_free.pdfIn PDF document text
    • http://livukuxuperum.epizy.com/brisbane_tv_guide_motogp.pdfIn PDF document text
    • http://vinuvomitatu.epizy.com/64493147267.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/710911d3-16d5-4c5c-8985-f59e8ba29b48/vulubajuwapunadamupogaz.pdfIn PDF document text
    • http://gezibetaw.epizy.com/mezokusesisejizasojimer.pdfIn PDF document text
    • http://xuxerutiwuv.onlinewebshop.net/92072888128.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/vixigokokexodezepo.pdfIn PDF document text
    • http://tereralubo.epizy.com/ancillary_justice_free.pdfIn PDF document text
    • https://s3.amazonaws.com/limewub/kopigasegodiberona.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_off0000eb17.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEB17 5696 bytes
SHA-256: 46b3fb0dc5945ed92a88b63c834ca5e9dee37ee2b10f60ef608faa85ed593d68
font_01_sfnt_off0000fe66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE66 11172 bytes
SHA-256: 27b31fe76d9fdcbefdfe429f03571e771e6b2716474c854cb9cbb0fac7593789

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