Malicious PDF — malware analysis report

Static analysis result for SHA-256 9cab2005b2851fbe…

MALICIOUS

PDF

68.8 KB Created: 2021-03-08 17:28:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-24
MD5: e7e514432fcc61cc4c1b304894667242 SHA-1: d6daca95e8be9e037e6515f183d89a5b22989c36 SHA-256: 9cab2005b2851fbebd55fbb60488def8d7cd406a1d7b3c820a1f3f74ddf1c0ed
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary suspicious URL pointing to a domain associated with phishing. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' indicates a pattern of using disposable hosting for link farms, further supporting a malicious intent. Although no scripts were explicitly extracted, the presence of embedded URLs and the ML classifier's high confidence score suggest this PDF is designed to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://gimoguvi.ru/award?keyword=bank+book+pdf+bd PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4416143/normal_5fda183002407.pdfIn PDF document text
    • http://mopowataxix.medianewsonline.com/nv3500_transmission_rebuild_manual.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/puselidadano.pdfIn PDF document text
    • http://juwupexutaval.mywebcommunity.org/is_a_2005_chevy_malibu_front_wheel_drive.pdfIn PDF document text
    • http://figimumagoko.mygamesonline.org/is_love_blind_cast_now.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4504922/normal_5ffe448adf092.pdfIn PDF document text
    • http://dufigep.scienceontheweb.net/samsung_rf26hfendsr_aa_service_manual.pdfIn PDF document text
    • http://xedeporib.medianewsonline.com/how_to_use_bands_for_abs.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481403/normal_6019d263583f2.pdfIn PDF document text
    • http://fapasevusiledap.mygamesonline.org/44253959411.pdfIn PDF document text
    • http://tesupelaj.sportsontheweb.net/conflict_management_styles_questionnaire.pdfIn PDF document text
    • http://jirenaxapibetig.scienceontheweb.net/seremewodanefafozaf.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/14e0afcd-7ce8-4a0e-bdbc-047337bf1863/bewujuvawu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b5c26c1f-be87-4e10-8d09-08aba6cdbae2/28947874885.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/581a7f84-e0dd-42b2-931c-9045bba1a501/91196624718.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6706a97f-df1e-42a5-80b6-6e92d85c2589/11683123183.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/882b85ba-c609-4556-83e3-22f8949a3bf5/75708690675.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddf80869-8b8a-4157-a114-2c4ef8aa8d92/discipline_and_punish_the_birth_of_the_prison_citation.pdfIn PDF document text
    • http://fotizojorirepel.onlinewebshop.net/how_to_confirm_dmv_appointment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fc7ba8fc-8146-4cff-a430-5733b6b13389/55496499813.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_off0000d1a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1A3 4984 bytes
SHA-256: a8f346b01575c58816ef806236a9a7f60989448943bdb2e01e25502b09547cc2
font_01_sfnt_off0000e2ac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2AC 10412 bytes
SHA-256: a102b2d991fac3ab9fc911ccccd4da9d9f76ae91494f375402763b8b51611874

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