Malicious PDF — malware analysis report

Static analysis result for SHA-256 8faa207d54c9c092…

MALICIOUS

PDF

73.6 KB Created: 2021-05-06 02:12:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b4acf0fd6c0fe8fb893ce28f879cb475 SHA-1: 7bbb57b3273326b0e9671a75bb35677b4bf8c92f SHA-256: 8faa207d54c9c092dbbc26df8c9c5e81b3d7b9695f9da3b21e95db54856d1f85
126 Risk Score

Malware Insights

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

The PDF contains a large number of external links, many hosted on disposable domains, indicating a link farm or SEO spam operation. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the structure suggests it's designed to redirect users to potentially malicious or deceptive content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • 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=graco+duetsoothe+swing+%252B+rocker+sapphire PDF link annotation
    • http://mudopuxez.22web.org/pisosevopuwom.pdfIn PDF document text
    • https://cdn.sqhk.co/kubepugemaki/oMcP6gc/822697767.pdfIn PDF document text
    • https://cdn.sqhk.co/jojikoxazew/ghii0SW/gedipiwasonagodagujujo.pdfIn PDF document text
    • https://cdn.sqhk.co/sategexarom/hjhmyhg/71522887911.pdfIn PDF document text
    • https://cdn.sqhk.co/lawafopugu/hePpgde/real_car_parking_2_download_play_store.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nekepozime.epizy.com/bissell_cleanview_bagless_vacuum_filter.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6c98cb03-c004-4f2d-8f57-efd0f205d89b/41584346596.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bf1d4320-013e-4100-b80f-2df17e5f3546/what_is_economics_definition_in_urdu.pdfIn PDF document text
    • http://vovugezufined.epizy.com/kasonumat.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c71276e8-0343-40e6-8778-710ea86dd41f/99631714342.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9d548c8d-2fae-4e65-9f7b-77adef356347/kurofori.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c34108-8934-4b24-817a-6a44b9c71844/37573900668.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5bbe9c50-07db-4e76-8335-43b135418212/where_can_i_exchange_soda_stream_cannisters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c4709f68-07d0-4be3-85c6-d64aa09ce363/42911483866.pdfIn PDF document text
    • https://9d349da1-218b-4b59-9e37-2a90cab56d40.filesusr.com/ugd/de9003_3c9a0db9f9c543bd9cc1e1c43c18bf64.pdf?index=trueIn PDF document text
    • http://fufinekudag.epizy.com/candy_camera_apk_hd.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ae8ded0-9d03-440b-a392-22534b2730a4/49561630576.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/282866cd-3742-4b08-b5bc-53e60c4af072/blue_iris_flowers_hinsdale_il.pdfIn PDF document text
    • https://26577e91-18e8-42c3-8e85-49dcca1d6605.filesusr.com/ugd/195787_4e7d232ea41f44c4969d480a946f3055.pdf?index=trueIn PDF document text
    • https://60ceb029-6f78-4d42-8ea4-15ca08d8077a.filesusr.com/ugd/857e61_9f988305dfc84fc7b0f55f67611f7fb4.pdf?index=trueIn 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_off0000e24e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE24E 5492 bytes
SHA-256: b05d14bcc0964d5768610f4e517d237fda2bd0280c578bbf433c1c4c6dded823
font_01_sfnt_off0000f50c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF50C 10812 bytes
SHA-256: 2c9bbb180b31cc1f9d82b090ec717b537af7a8ef658bf567b0b16bdf6b8a3761