Malicious PDF — malware analysis report

Static analysis result for SHA-256 05c487fdf2bf783e…

MALICIOUS

PDF

72.1 KB Created: 2021-03-12 18:44:21 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 9db54758eff70000d6309d0c1bb7e0b0 SHA-1: e848d14730b4a101a617d3906615d53a18a5ca46 SHA-256: 05c487fdf2bf783e497a771fc791d25bfdc7bd8f2c3f41a6abfda8ad9e7aa681
126 Risk Score

Malware Insights

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

This PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous embedded URLs, many of which point to disposable hosting or link farms, suggesting a phishing or malware distribution scheme. The document body, though heavily obfuscated, contains keywords like 'manual pdf' and references to 'wkhtmltopdf', indicating a potential lure for users seeking specific documents.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

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://pelibifir.ru/award?keyword=ford+apqp+manual+pdf PDF link annotation
    • http://midimox.getenjoyment.net/business_model_canvas_vs_lean_canvas.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424011/normal_5fe3aee5bfa34.pdfIn PDF document text
    • https://cdn.sqhk.co/xavexapoxiv/idOijge/fusion_s_chao_editor_sonic_adventure_2_download.pdfIn PDF document text
    • https://cdn.sqhk.co/dasadogiso/hhahgMC/f1_2020_playstation_store_pre_order.pdfIn PDF document text
    • https://cdn.sqhk.co/zogobadakedu/wnLvThe/15938185493.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460950/normal_5fdf8909938fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4458132/normal_5fd90fa03077b.pdfIn PDF document text
    • https://pesiwuveso.weebly.com/uploads/1/3/5/3/135392822/5952380.pdfIn PDF document text
    • http://fajujefa.getenjoyment.net/just-in-time_systems_are_considered_part_of_which_primary_activity_in_the_value_chain.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4478127/normal_600254a5976fe.pdfIn PDF document text
    • https://vuzaruluweketex.weebly.com/uploads/1/3/4/4/134478477/wivewitit.pdfIn PDF document text
    • http://xevusezes.medianewsonline.com/barefozubafineru.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/20487474358.pdfIn PDF document text
    • https://pilidikuvitas.weebly.com/uploads/1/3/4/7/134766888/292c1e2809236c.pdfIn PDF document text
    • https://cdn.sqhk.co/rawegili/Mgcjjhj/84323832093.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4371269/normal_5ffca9a28a154.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5fe821ee01a11.pdfIn PDF document text
    • https://cdn.sqhk.co/xapawavuma/3jj4ji5/dovak.pdfIn PDF document text
    • https://jobalexaxikut.weebly.com/uploads/1/3/4/8/134892204/23fbde8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379486/normal_5fd6c3952069e.pdfIn PDF document text
    • http://fezufizibum.mypressonline.com/kobokaw.pdfIn PDF document text
    • https://finaxapiw.weebly.com/uploads/1/3/5/3/135301963/liwega.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/a2fdfdfc-3820-4d2c-b6f4-70d8a33f9f19/what_were_the_three_main_reconstruction_plans.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3215b31-2e37-497c-bb6f-82f9e8098eb4/wefejijifusaduj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2ae7bdae-1bcf-4399-902e-55a4ab2fd6b9/what_is_the_value_of_the_smallest_bond_angle_in_clf4_enter_the_smallest_bond_angle_of_the_molecule.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af1afee6-faf2-44b7-b443-8da57ca5033d/26112992863.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_off0000deb9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEB9 5092 bytes
SHA-256: 18b1ff4aad5d6fec8e9f8af5b4e4f3d41905f8f74fda46e5a9e234cb7c9187e7
font_01_sfnt_off0000eff8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFF8 10244 bytes
SHA-256: 4a0c8eb339b17d07dc8d3cc85ff76e4bc7a4e0531686060e94486f0a77fcee91