Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6326f201dc29ea6…

MALICIOUS

PDF

81.2 KB Created: 2021-04-08 11:10:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a169850a74d4fb740eb7c6c546170e33 SHA-1: 854a7e4121d57fb26845f7c6936800dddcbf17bb SHA-256: e6326f201dc29ea692ff2b9b4c34dd90b3f2149eaee02e37ea8cd6fc88cb88c3
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a large number of external links, many hosted on disposable domains, indicative of a link farm. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or distributing further malware. The primary function appears to be redirecting users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://kuzutuzo.ru/strik?utm_term=how+big+is+a+10+by+30+tent PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4501214/normal_6066ffb787f46.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425487/normal_606164a91669d.pdfIn PDF document text
    • http://xavesusefowale.mywebcommunity.org/arabesques_debussy.pdfIn PDF document text
    • http://bejawutipage.mywebcommunity.org/82418786888.pdfIn PDF document text
    • http://fofiwafajelerax.sportsontheweb.net/romeo_and_juliet_law_in_texas_2020.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4486550/normal_5fde61545cedb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373502/normal_602cb571711b9.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://29159626-56e2-4eb2-a8c1-eb081f451e44.filesusr.com/ugd/a58502_98921f5dfc0c45afbeb3c69d4fd2354e.pdf?index=trueIn PDF document text
    • https://e49cd12a-7e53-4a25-9f98-ae37b5ff2e44.filesusr.com/ugd/35dc59_a4e9988c2bc4462ab0cb014ea6ecc962.pdf?index=trueIn PDF document text
    • https://907864b8-ab38-4b43-b195-7646ee37c451.filesusr.com/ugd/c4b402_960164630ebb4c7b887eed26310fc7ee.pdf?index=trueIn PDF document text
    • http://setowibuvi.epizy.com/34377777635.pdfIn PDF document text
    • http://gafodix.myartsonline.com/68058970755.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4b7084cc-2719-4615-b92f-b0b880821542/namidituxatupojegug.pdfIn PDF document text
    • https://b01ec662-dec5-4f54-b977-8708717d6054.filesusr.com/ugd/07e02c_edfcde98af1a45d38a4fcc8806fb88d2.pdf?index=trueIn PDF document text
    • https://11f44e1d-c86f-4be6-baa1-90970e7c24f5.filesusr.com/ugd/a298ce_e714e73693484da6a14e5453d01b8638.pdf?index=trueIn PDF document text
    • https://d7d9470a-9784-4c28-ac68-b1ab0f70ddf3.filesusr.com/ugd/148484_14370fb91ba94e66981bae1943e5065c.pdf?index=trueIn PDF document text
    • http://bumilofu.rf.gd/troy_bilt_pony_carburetor_adjustment.pdfIn PDF document text
    • http://zalolod.epizy.com/choices_hack_without_app.pdfIn PDF document text
    • https://d0f5cf02-e55f-42e7-ba97-8a4d5a2b8368.filesusr.com/ugd/7f59a0_6ff390f0075c4701a98c9b36d0b77021.pdf?index=trueIn PDF document text
    • https://45ed8376-e832-497f-ab20-0a31924dc5db.filesusr.com/ugd/4b7290_642db9ddd1cc4a5fa0ab5051cbd81ab3.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/c925517d-f484-45dd-be77-0012c9b11869/ruzewumabetev.pdfIn PDF document text
    • http://retexibew.rf.gd/find_the_camel_alzheimer_s_answer.pdfIn PDF document text
    • https://cb2d4818-2134-4ea5-ae57-1bc45cfc4292.filesusr.com/ugd/7e787c_422a518026e949a6a88ceba8d6583937.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f2b9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B9 5164 bytes
SHA-256: e78b210fed8a76302e25bd2ddf648be9ae07ad22ec69bcd6f3769a5c3b1993e0
font_01_sfnt_off0001046b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1046B 10952 bytes
SHA-256: 11fc5a593b3bb02854bac90aa6915bed441406943bf9c3aad46dd3a1417d174d
font_02_sfnt_off0001299a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1299A 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361