Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b86c6ec74af1cda…

MALICIOUS

PDF

77.9 KB Created: 2021-04-24 00:31:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-22
MD5: f794c0887e5be2ccd1469c48f75fe04b SHA-1: 2723a52d8b3edad156f0e52c9ad9fa38c04ca4a3 SHA-256: 3b86c6ec74af1cda28987cad72b15c582b0ea2d71f5e45d3f07cdbb054050e52
186 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or trojan distribution attempt. It contains a significant number of external links, many pointing to disposable hosting, suggesting a link farm or SEO manipulation tactic. The embedded URL 'https://jumiwimov.ru/strik?utm_term=eaters+rise+of+the+dead+movie' is a primary indicator of malicious intent, likely serving as a redirect to a phishing page or malware download. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://jumiwimov.ru/strik?utm_term=eaters+rise+of+the+dead+movie PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4375070/normal_60309706ac155.pdfIn PDF document text
    • https://cdn.sqhk.co/dewufidabo/hjfa6hc/lego_jurassic_world_ios_dn8_codes.pdfIn PDF document text
    • https://cdn.sqhk.co/matelasoguje/HakfgiX/maludiwizivepuz.pdfIn PDF document text
    • https://cdn.sqhk.co/tusumawibe/RHlhbje/anaconda_3._5_free.pdfIn PDF document text
    • https://cdn.sqhk.co/gemadaruvow/TqHaD0r/gom_audio_player_pro_apk_download.pdfIn PDF document text
    • http://kexufiloruruki.22web.org/can_you_netflix_shows_onto_laptop.pdfIn PDF document text
    • http://jelinevoj.22web.org/fly_me_to_the_moon_ukulele_chords.pdfIn PDF document text
    • https://cdn.sqhk.co/vonezositixi/aqIicgj/22165142125.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4387918/normal_5fd7dd983c282.pdfIn PDF document text
    • https://cdn.sqhk.co/tategupet/jcWRPgj/zomato_premier_league_app_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://26f2e344-8444-46ea-90c9-5a893bcc2fb3.filesusr.com/ugd/b8c837_42ddab7b8a1749cbb4100c502ba8911a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/03db7697-9358-435d-b6a0-76b855e08bac/python_for_beginners_free_book.pdfIn PDF document text
    • https://238a82c5-85a8-4641-a991-2f0f5270ddc4.filesusr.com/ugd/63f22d_83f7ff3ef0844ed68f257a24bb881fe8.pdf?index=trueIn PDF document text
    • http://wexitabuvup.epizy.com/sinergismo_y_antagonismo_en_farmacologia.pdfIn PDF document text
    • https://56148a0a-83a3-4003-94ff-78d3044b7c00.filesusr.com/ugd/6f5f23_e9e154ada7f24e39ae467a313037e99e.pdf?index=trueIn PDF document text
    • https://451b78f8-089e-4d4d-bc4b-60abb621f7e6.filesusr.com/ugd/7ef0dc_ada3708443064f5ab1fb6f2a8fb14a26.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/2c36d050-c375-4ee7-a442-ab8aaa8bcf5c/laladowe.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b6378fbc-3cd9-4590-a609-22e931a8b409/how_to_clean_haier_washing_machine.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ac4746f-3692-4afb-b963-634ccf802f5c/lumirivenugajewaniluxide.pdfIn PDF document text
    • http://jerokiguwipifo.rf.gd/litinowidevolazazudizavu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/594e2c4b-2912-4100-bc76-9f3365b50847/is_boss_audio_systems_a_good_brand.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_off0000f218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF218 5132 bytes
SHA-256: 425d43d152e0107a335b71bcadcd61bf0faddb6a7bf0e28d70dad7c9c8c38c15
font_01_sfnt_off0001036c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1036C 11452 bytes
SHA-256: 5485b62cf8a3033204225d63991c1575700d5f48e8e0550da203c89f8d18e592