Malicious PDF — malware analysis report

Static analysis result for SHA-256 84b7c0f05c3a4a2d…

MALICIOUS

PDF

74.5 KB Created: 2021-05-09 19:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 8b17af59bd70e1c90bb55ff6732b6b42 SHA-1: e86b25e0a0aa1d860e103eecd9a2cd3bec628a6e SHA-256: 84b7c0f05c3a4a2d4f532a90e00e455c705d0aa24d79198e88f89b6d92896815
186 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://jottigo.ru/strik?utm_term=best+bodyweight+exercises+for+weight+loss+video PDF link annotation
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/5236846.pdfIn PDF document text
    • https://wivusogonelom.weebly.com/uploads/1/3/5/3/135310870/34595.pdfIn PDF document text
    • https://sajamokof.weebly.com/uploads/1/3/4/5/134599006/xowajojonoxi-marobobebojefiz.pdfIn PDF document text
    • https://sejixegagetuta.weebly.com/uploads/1/3/0/9/130969850/zexot.pdfIn PDF document text
    • http://lovupijuti.getenjoyment.net/business_development_executive_interview_questions_and_answers_for_freshers.pdfIn PDF document text
    • http://ruguwafe.scienceontheweb.net/93898938188.pdfIn PDF document text
    • http://lipuwisapi.mywebcommunity.org/agent_agreement.pdfIn PDF document text
    • https://tokegomobox.weebly.com/uploads/1/3/4/3/134314144/xurumabakite.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/stefan_banach_algebra.pdfIn PDF document text
    • https://fijapirugonobi.weebly.com/uploads/1/3/4/3/134315317/xeved.pdfIn PDF document text
    • https://xuvifadeto.weebly.com/uploads/1/3/2/6/132682806/cd4be05309bf1.pdfIn PDF document text
    • https://telejifuzi.weebly.com/uploads/1/3/5/3/135313468/670095.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://8c0e102b-efba-4641-b7fc-347c26357927.filesusr.com/ugd/d420ee_fd39ee1f57464115bf18c5179512a774.pdf?index=trueIn PDF document text
    • http://robuxil.epizy.com/restricted_area_game.pdfIn PDF document text
    • http://tixofimisupabev.onlinewebshop.net/hygiene_meaning.pdfIn PDF document text
    • https://b46c4cda-4951-41c0-816f-bbf02eee4d9b.filesusr.com/ugd/4ff992_3f2dfaeb8367437dae89c4521388341a.pdf?index=trueIn PDF document text
    • http://pakewon.rf.gd/black_decker_coffee_pot_instructions.pdfIn PDF document text
    • https://6129906d-bc82-46a7-99f5-71793a58af3c.filesusr.com/ugd/d162e3_640b0732960f4ae3add3f49af4a05724.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e56f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE56F 5584 bytes
SHA-256: 9315c64c45c5ac06203b58b59c8acc00ee43974841a74b85d2f620d74ea53b30
font_01_sfnt_off0000f89b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF89B 10336 bytes
SHA-256: e9864b3324856df7c2f1fa656c761944dc43caa0801805ce6992b15b88813b6f

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