Malicious PDF — malware analysis report

Static analysis result for SHA-256 00df6c4866c64b92…

MALICIOUS

PDF

84.8 KB Created: 2021-04-04 22:03:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: a5e6c34f36f9b3360e1cc1e1dbd0acce SHA-1: e13f593f1a40517a3b11be9e8ad5e63dcd5e3311 SHA-256: 00df6c4866c64b92ac311be9f6771d9f5b5c5323c9a67c84bc8fe88ac33076cf
186 Risk Score

Malware Insights

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

This PDF file contains a significant number of external links, many hosted on disposable domains, indicating a link farm or SEO manipulation tactic. The presence of a critical ClamAV detection and a high ML score further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and extensive external linking suggest it is designed to redirect users to potentially malicious content or phishing sites.

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://gimoguvi.ru/strik?utm_term=texas+instruments+ti-84+plus+c+battery PDF link annotation
    • http://animoney.xyz/protective_relaying_theory_and_applicationslpiof.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459788/normal_6055bf110b808.pdfIn PDF document text
    • https://mazabutefudoxuw.weebly.com/uploads/1/3/4/0/134017854/fagev-gatopin-fanasab-puloliwulu.pdfIn PDF document text
    • https://vobawele.weebly.com/uploads/1/3/5/3/135334277/vapuxenazomaza.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_604066a3719ff.pdfIn PDF document text
    • http://avto-trokot.xyz/sql_server_installation86256.pdfIn PDF document text
    • https://nikubasixuza.weebly.com/uploads/1/3/0/7/130738960/3243707.pdfIn PDF document text
    • https://popewike.weebly.com/uploads/1/3/1/4/131407195/8039576.pdfIn PDF document text
    • https://bawidonawasaz.weebly.com/uploads/1/3/4/3/134354070/mololu_vonite.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4378425/normal_6002e84cbf178.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pisumapopub.rf.gd/how_to_report_yeast_cells_in_urine.pdfIn PDF document text
    • http://pinukemedorurol.rf.gd/kosirolosir.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f54b8c0-78e5-43f6-b490-762e44d311e5/s_kiu_truyn_phn_2_tm_tt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c90d9ca5-152e-4676-8ce7-1a6a2a2e3906/zasewirefivorasad.pdfIn PDF document text
    • http://rufokafujiza.rf.gd/biblia_devocional_de_estudio_gratis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8ef59c0-a831-4bfd-9e51-4ae4c28f5517/62318799706.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/42e59865-5185-4b11-bf52-9ff440388c6d/betubewupodenij.pdfIn PDF document text
    • https://36fc1fe3-b646-4cc1-b6e9-de51469aea27.filesusr.com/ugd/3eb4bd_ddd73f035ef7420baea6c42f6c71ffc5.pdf?index=trueIn PDF document text
    • https://d8d078ea-10ec-4787-8e21-ef6e32b87a24.filesusr.com/ugd/8f6098_d1800379e29847ba97ae40cbaac35433.pdf?index=trueIn PDF document text
    • http://fawogalupa.epizy.com/civilization_6__android.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/daae6a02-beac-44e9-acdb-980e488fa9ae/35710943822.pdfIn PDF document text
    • https://1d942ef5-affb-47d8-8f99-70a3d187b733.filesusr.com/ugd/3283b0_c9e64a77898a491ea9e3ce9b5ca3a77c.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_off000106aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x106AA 5652 bytes
SHA-256: 4bcbb288d69d0bef187cbeca51a5e76b99bab2635fd4ced61b14e110e46f52cc
font_01_sfnt_off000119ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119EC 13020 bytes
SHA-256: 8ba8782e076630c2a11bdf1169f86fd6899841059c4def97734ca7138b499c32