Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0d96a1dd91b9c86…

MALICIOUS

PDF

96.3 KB Created: 2021-05-27 03:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: ea43378d649bc6d0ccaa1e614dcd2104 SHA-1: bdc65c03555f6a24a18ee044f2b190caff5ca6a1 SHA-256: d0d96a1dd91b9c86deac15b8e02dc865ea1cdeda4f12221f28739d6f0303a2d3
186 Risk Score

Malware Insights

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

The PDF contains a significant number of external links, many pointing to disposable hosting services, indicating a link farm or phishing lure. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

Heuristics 6

  • 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.
  • 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/strik?utm_term=what+are+functional+regions+of+cell PDF link annotation
    • https://xofeboje.weebly.com/uploads/1/3/4/5/134584890/zanatub_nulevol.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379237/normal_604b7a3398ef4.pdfIn PDF document text
    • https://pazixexawa.weebly.com/uploads/1/3/1/4/131437352/zavutowariv.pdfIn PDF document text
    • https://vadiduriku.weebly.com/uploads/1/3/4/4/134445950/matupij.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380379/normal_6045dc916866f.pdfIn PDF document text
    • https://rativebexatu.weebly.com/uploads/1/3/2/3/132302992/4512710.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470828/normal_60635d41dde49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4405644/normal_5fcd9ffc9ee49.pdfIn PDF document text
    • https://daruxugow.weebly.com/uploads/1/3/7/5/137511804/9710738.pdfIn PDF document text
    • https://vilukenuxe.weebly.com/uploads/1/3/2/8/132814007/xupubafurukini.pdfIn PDF document text
    • https://mozurizubomexaj.weebly.com/uploads/1/3/4/6/134643417/pijutuvajip.pdfIn PDF document text
    • https://jerepukiw.weebly.com/uploads/1/3/2/6/132681878/durada.pdfIn PDF document text
    • https://dewufore.weebly.com/uploads/1/3/4/8/134857007/2795a5df7.pdfIn PDF document text
    • https://xikefopu.weebly.com/uploads/1/3/4/7/134748362/joxofazekezesebujo.pdfIn PDF document text
    • https://dutilugamon.weebly.com/uploads/1/3/5/3/135301630/liwemo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369158/normal_6024562052542.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/5d3dab55-1904-41e2-9471-73e576d12aa6/jalilipigowavagowevobixur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/96be43ce-ceae-4482-9ae6-d2abd9fc28c0/nuxujufu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad0c4e5f-0afe-4272-bc36-d81586e0de54/lg_front_load_washing_machine_not_opening.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1a5e4836-6850-4517-b4ae-50b9c192d033/marquette_welder_model_501.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7424ac9-e0d2-46b7-af7d-04b556ee2dbc/epson_v370_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48b1d955-979a-4362-a8bc-2857cc5bd4cc/les_adjectifs_possessifs_en_franais.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ea8cf204-3ae3-4ded-8b2c-93ef0e9c69f9/24784925556.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2621ef89-fb8a-4410-85bc-34d82a340557/what_is_the_best_exercise_for_40_year_old_man.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a51217ab-a884-425e-91c4-d1f65a6c83bb/how_to_set_up_speakers_to_pc.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_off0001367e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1367E 5156 bytes
SHA-256: 3ee2a6ff5691a2a93d74faa13ba474cfe79c66751c10f04915d9eb2c80049999
font_01_sfnt_off00014814.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14814 13392 bytes
SHA-256: c00ee89e77895320c438133d6d83c823bac96ab06398e3e048405cca5f8376b5

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