Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ee1e489b455df56…

MALICIOUS

PDF

81.6 KB Created: 2021-04-10 17:15:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 230868fee483e6bdacd91f3dc4b7a369 SHA-1: 116fe6cb976b7edfe44df0266ba50c602fcad1b4 SHA-256: 9ee1e489b455df56ceb891cac91ac33b2efcf10bf38368683b3a310c7d20c549
186 Risk Score

Malware Insights

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

The PDF file contains numerous external links, many pointing to disposable domains and employing UTM parameters, indicative of SEO spam or phishing lures. The ClamAV detection and ML classifier strongly suggest malicious intent, specifically identified as 'Pdf.Phishing.Trojan'. While no scripts were directly extracted, the PDF structure and embedded URLs suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://ponafet.ru/strik?utm_term=how+much+do+steel+frame+doors+cost PDF link annotation
    • http://ouily.xyz/genie_2042_sprocket_replacementxwuoy.pdfIn PDF document text
    • http://xtina.online/triethylamine_must_be_used_in_the_fume_hoodj2xyg.pdfIn PDF document text
    • https://cdn.sqhk.co/verexoleki/d7Ye8SG/fufexunonezewalekizo.pdfIn PDF document text
    • http://klyshsheff.xyz/the_leadership_experience_daft_free_download4cqp2.pdfIn PDF document text
    • https://cdn.sqhk.co/vasibejovej/jgjiFgd/79975013107.pdfIn PDF document text
    • http://vorecan.fun/kumobirixatatt23dm.pdfIn PDF document text
    • https://cdn.sqhk.co/somepizeko/yiibvue/primenap_free_sleep_tracker_for_apple_watch.pdfIn PDF document text
    • https://cdn.sqhk.co/xojelumegasi/4hjfMFm/smash_hit_meaning_in_gujarati.pdfIn PDF document text
    • https://cdn.sqhk.co/logenuzupug/sjftnfe/barbershop_3_film_streaming_vf.pdfIn PDF document text
    • http://helplnstagramcontact5087423.com/6904743001irwoe.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/0953ca76-19a3-473b-9b3f-66e2f9fcc8d9/fender_mustang_1_amp_settings.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/40dbb12b-4087-4658-966f-91b7e18183a0/auto_air_conditioner_repair_cost_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/41894ca9-ef4b-4619-9d3d-7baa5fd517f5/the_penelopiad_chapter_14_summary.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e8f9750c-85cd-42d6-a37c-cc3dccd75ffd/39449200348.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ecdb7c2c-f4ba-47cf-b771-fa6d8fc2492d/dbt_worksheets_linehan.pdfIn PDF document text
    • https://s3.amazonaws.com/waduzirader/sosugir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f6453ee5-110d-4813-8863-b885166783db/death_note_2006_subtitles_english_netflix.pdfIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_d01eee8150274366835e69d7e1304f6b.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/kotodur/wukugufeni.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9df46dde-40b5-4b9f-b77b-52058ef49877/libro_cuando_lo_que_dios_hace_no_tiene_sentido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cac52116-b9db-476c-b7f4-223f4ebbdc63/how_to_throw_out_old_clothes.pdfIn PDF document text
    • https://s3.amazonaws.com/latufenaw/pirifuvopugumobixe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06f936fd-15bf-4860-b6c0-46cd54645177/83051689119.pdfIn PDF document text
    • https://26c1613e-5d28-4fa3-89cb-3d2c9ab59faf.filesusr.com/ugd/fe83c3_f738b8931fbd45cbb771f2db6885483e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/legobegutulo/93870703342.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_off0000ff80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFF80 5316 bytes
SHA-256: 4a7a0984ff23d390fe2e886421b518ff3b72f8d68ad23c2d0200652d30f3d448
font_01_sfnt_off00011173.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11173 11828 bytes
SHA-256: dd4029c58d9e3958eea806fa472ea98469f3d2e495287e25de02f0b1232aeec8