Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb89a3840c0853a8…

MALICIOUS

PDF

70.9 KB Created: 2021-03-14 02:38:11 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 54006c40dd9e4489055cf5cd39df01f5 SHA-1: b36b1a77a95a16c3eab923be84e5babca35fe71d SHA-256: cb89a3840c0853a8dda518210ebf61bd91c487905a9008cd1088187683edc257
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with several pointing to disposable domains and one specifically identified as a link farm. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://pelibifir.ru/wix?keyword=burlington+elementary+school+billings+mt PDF link annotation
    • http://winoorama.website/parallelogram_worksheet_geometry80lym.pdfIn PDF document text
    • http://zejirejajedudu.getenjoyment.net/tezipetomudajezesox.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366399/normal_5fc7970e18688.pdfIn PDF document text
    • http://zhigina.ru/warcraft_3_frozen_throneahd5q.pdfIn PDF document text
    • http://iranianvc.com/5532704522n0yp5.pdfIn PDF document text
    • http://winoxolupuvil.getenjoyment.net/reiki_level_1_attunement_procedure.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366623/normal_5fd2aceccf123.pdfIn PDF document text
    • http://on-arenas.com/mughni_al_muhtajrwlhq.pdfIn PDF document text
    • https://s3.amazonaws.com/nefomojuwet/bafipakav.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4495691/normal_602433490a535.pdfIn PDF document text
    • https://s3.amazonaws.com/nonabafat/62198754187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392853/normal_60040662ea4fd.pdfIn PDF document text
    • http://hackins.site/how_do_you_add_improper_fractions_with_whole_numbersqksaa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460983/normal_60188b4fd598f.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/cab4e1fa-baef-471d-9b24-2275dc4b5d6b/rotuvakabopado.pdfIn PDF document text
    • http://fajenadiwizowo.atwebpages.com/mabijuvejiwimuxaverara.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47fd37d2-c59e-4efd-a14b-38e291f933e3/list_all_the_verb_tenses_in_english_language.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f85de5d1-4631-4c67-b533-d39ea4063ad6/jabawujexumekakawaku.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b9e26c4-e51e-4805-9717-3c21de0e0554/computer_hardware__networking_course_in_delhi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc536fe4-0304-4aeb-9f71-eb3960e0ff49/d_and_d_players_handbook_5e.pdfIn PDF document text
    • http://tavamikilav.myartsonline.com/blood_test_report.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4e0d31c4-66ea-4913-80c9-c39d254136ca/probability_and_random_processes_by_s._palaniammal_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/01b93d9a-b411-4253-b6e1-f8a0249f9486/narufesobaxizonudekerida.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/25a03b87-c226-41cd-a846-bee2d224b0ab/lipozoxe.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_off0000d461.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD461 5504 bytes
SHA-256: 965e591e529da957ff27749e726ec1d8bb25250a6d873125f3ea21180a7c6af6
font_01_sfnt_off0000e6f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6F2 10780 bytes
SHA-256: c76538b99974013fa966ad0ae746a7517ee43e6631d21b2b22a64567293cf5f8