Malicious PDF — malware analysis report

Static analysis result for SHA-256 eeadd342cacf0762…

MALICIOUS

PDF

83.9 KB Created: 2021-03-05 13:10:14 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 8fa5e133e4d1d78e2085aa46efe566a5 SHA-1: 5f8d1a2626f137013f1c157374ed08e086148e3f SHA-256: eeadd342cacf0762f714ebaf93b4b488f787c90a2287fa5d71eb112c5f3b177b
186 Risk Score

Malware Insights

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

This PDF document contains a link farm designed to redirect users to external websites, including a suspicious URL related to a search query. The presence of numerous external links and the ML classifier's high confidence score indicate a malicious intent, likely to phish for information or lead users to further malware. While no scripts were directly extracted, the PDF structure and embedded links strongly suggest it's part of a phishing or SEO poisoning campaign.

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://mezovuduw.ru/award?keyword=revolution+2020+release+date PDF link annotation
    • https://cdn.sqhk.co/niririga/jgiiegh/application_vidmate_download.pdfIn PDF document text
    • https://cdn.sqhk.co/rapekerokemo/ihAjahf/world_of_darkness_character_sheet_online.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/LTgjDib/pelugaxuribarawoxiteme.pdfIn PDF document text
    • https://gozerezujokosas.weebly.com/uploads/1/3/4/8/134856803/2dc93dc38403cf3.pdfIn PDF document text
    • https://pafebexazare.weebly.com/uploads/1/3/1/1/131163914/dasefozi.pdfIn PDF document text
    • http://kasaxeko.mypressonline.com/how_to_learn_boxing_at_home_wikihow.pdfIn PDF document text
    • https://cdn.sqhk.co/resozasevej/Lghifk9/gidekavefuludufo.pdfIn PDF document text
    • https://pifupiwotuz.weebly.com/uploads/1/3/1/3/131384694/bipasabuven-napozod-mevevevovawat-bamomekov.pdfIn PDF document text
    • https://cdn.sqhk.co/faroziwe/gcASOIg/kuvasonisade.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/3455c49b-85ae-4c37-a98a-daf75f59aa0c/2343089527.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1482ac05-e577-48c0-9762-0c7c47a16311/how_to_train_your_dragon_book_set_australia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/89e647c7-9301-41ab-a572-73fd8591a70e/ruludunexavoxikuf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/848667f3-c6f6-471b-8845-7aa216bf2d3b/xizutipetidome.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b9e141c5-1d97-4bf7-bc2d-e708ec2aa5e4/melhor_curso_de_marketing_digital_rj.pdfIn PDF document text
    • https://506dbbd1-d4b3-44b1-a4c9-6b5d0cab6a23.filesusr.com/ugd/c75f60_b6f7048d38d5465383f1af57f8d944ab.pdf?index=trueIn PDF document text
    • http://zepuwiz.atwebpages.com/how_to_sign_up_for_staples_teacher_rewards.pdfIn PDF document text
    • http://jowatazurusu.epizy.com/what_is_a_jeep_grand_cherokee_srt8.pdfIn PDF document text
    • http://gototura.myartsonline.com/why_list_your_company_on_stock_exchange.pdfIn PDF document text
    • https://8dac4d01-2cd1-45d2-8b5f-6005f802adc9.filesusr.com/ugd/1f96ce_d3ddc7b94b2d413f937286d7f83cb20f.pdf?index=trueIn PDF document text
    • https://034618a9-9b39-4f41-ad18-95bca1d1c80b.filesusr.com/ugd/48d9a1_7fa8b848ca5847de908198b0148a19b5.pdf?index=trueIn PDF document text
    • https://d71fc03c-aea6-48f7-a990-8afffb22108d.filesusr.com/ugd/3de8a6_1242a5556bd34d01893e672d06684d6e.pdf?index=trueIn PDF document text
    • http://buvudateba.epizy.com/sibugofenupojejaga.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_off00010c5e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C5E 5160 bytes
SHA-256: 300a4dbace93b2b9bcfdbcb4faaf9fdce5480b3149847eef75687f52f452775f
font_01_sfnt_off00011dfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11DFD 10684 bytes
SHA-256: 4caaa9c053a07f0c68db2db236e9649d3bfb35503797481b8010225777ae6857