Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e21d34069eac093…

MALICIOUS

PDF

90.0 KB Created: 2021-04-23 18:16:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 49a021155ed31f878cc8ac414b0d7dd7 SHA-1: e1977577626ba9b77afd37a868ccab248a5a97e7 SHA-256: 4e21d34069eac0937bc3a957636b68cb8a420c5d77372199e569a9c920390369
66 Risk Score

Malware Insights

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

The PDF document contains embedded links and a lure related to 'geometry answers', directing users to a suspicious URL. The ML classifier strongly indicates maliciousness, and the PDF structure suggests it's part of a link farm designed to redirect users to potentially harmful content. No scripts were extracted, but the overall pattern suggests a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

Heuristics 4

  • 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=lesson+7.1+practice+b+geometry+answers PDF link annotation
    • http://apsdd54gfv.xyz/70621539513bpvbw.pdfIn PDF document text
    • http://form-lnstagramcopyrightservice.com/tidujewwnp2.pdfIn PDF document text
    • http://tobazoduto.22web.org/39866044075.pdfIn PDF document text
    • http://levelupguild.com/4858990911nisgr.pdfIn PDF document text
    • http://fringigejy.site/wufamezivodovugojal97q0.pdfIn PDF document text
    • http://cocobeautybar.ca/22845413838sg7rm.pdfIn PDF document text
    • http://nosinoski.shop/stock_j._and_watson_m._introduction_to_econometrics_20156necp.pdfIn PDF document text
    • http://logunej.iblogger.org/virginia_condominium_act.pdfIn PDF document text
    • http://zajawezexefijuk.22web.org/basic_c_programs_for_practice.pdfIn PDF document text
    • http://myshoes.moscow/contact_types_in_ls_dynaql3jl.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/de64fe3e-3f2c-4524-965b-cccdbea59838/good_table_topics_questions_for_toastmasters.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55257613-3d09-4248-934f-6950a9cd5757/leliparapidojejavi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/992dd141-c0ff-40f2-a327-6dc4394399ee/48478746438.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/dbe0d259-cd34-4d4c-9746-fe0fa4e9a0bf/how_to_reset_proform_treadmill_incline.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/28a00f67-af1c-4e0e-a87e-ab25ececce29/being_and_time_audiobook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d672c1a8-2fec-490b-b845-7d073029d790/16489511654.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9882e52d-3f36-4c88-a576-0a4bd0ec3943/how_to_pair_polk_soundbar_to_xfinity_remote.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b93846e4-391f-408c-8992-352e5a44e77d/which_continent_moved_the_least_from_pangaea.pdfIn PDF document text
    • http://tesalivolanimeg.rf.gd/kudedometunivax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0610d77-61c8-4d6f-aad3-3dfe3ae50ce4/stock_market_terminology_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6bbd4c5b-b061-47a5-8d1b-52204271fa9e/nesoxararu.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f983.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF983 5580 bytes
SHA-256: 178979b1c6e4dc4263f9183575495733855dc6918313b2a034c43122c863ddf8
font_01_sfnt_off00010cbd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CBD 5660 bytes
SHA-256: ad816b8eacda2d7731b89c7455a47e1a423298fea8cbcae5877583b9486d189f
font_02_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 10844 bytes
SHA-256: 0c4edcd9c25c0f856e2fa3822b99274255a2c4b8f5b9c2447e5ed35ff6c42fd9
font_03_sfnt_off00014554.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14554 16084 bytes
SHA-256: a592162a049b3456564a21861371a9629d5167bbec010eb339ac319ebcd668e3