Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ee94178fe7de19c…

MALICIOUS

PDF

78.8 KB Created: 2021-04-10 08:33:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: b0a7daafa38e1086cfa7d5e9f3bbdddd SHA-1: b467e789d0c1e36d8035fac8b623290b65563f9c SHA-256: 3ee94178fe7de19ccc552f641a523fef542674c80468a11d73cd61f23b43ae95
186 Risk Score

Malware Insights

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

This PDF document was identified as malicious by ML classifiers and ClamAV. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm designed to redirect users to potentially malicious content. The presence of external URIs and the overall structure strongly indicate a phishing or malware distribution attempt, likely delivered as a spearphishing attachment.

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://jumiwimov.ru/strik?utm_term=speed+queen+commercial+washer+cycle+time PDF link annotation
    • https://jurulekoteg.weebly.com/uploads/1/3/4/7/134700509/nujetawudolaji-bumuxexabo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392853/normal_60160427479a2.pdfIn PDF document text
    • https://tetumuvagawemol.weebly.com/uploads/1/3/4/5/134522004/guxowe-woboma-werowulidexugud-suzevo.pdfIn PDF document text
    • https://jurijibo.weebly.com/uploads/1/3/0/8/130874645/386265.pdfIn PDF document text
    • https://moxujudafetofa.weebly.com/uploads/1/3/2/7/132712376/milimurogujebazavege.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4370088/normal_5fdd685660bc8.pdfIn PDF document text
    • http://zesegalos.scienceontheweb.net/gagodenogam.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388178/normal_600e8a9a0f4c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386081/normal_600a4b7fcf1a6.pdfIn PDF document text
    • https://ludekomu.weebly.com/uploads/1/3/4/5/134505051/domonisifasubis.pdfIn PDF document text
    • https://nodemudikukurev.weebly.com/uploads/1/3/5/3/135348567/5838505.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455642/normal_602533912e363.pdfIn PDF document text
    • http://vuwefedope.sportsontheweb.net/85560319677.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488582/normal_605049915346e.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4505699/normal_5fe601b108404.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/5df3a5f9-f7aa-414f-a315-8250c590d806/wemofudajikunare.pdfIn PDF document text
    • http://kaloruligot.onlinewebshop.net/passive_and_active_voice_tenses.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/91b3d02e-63b9-4828-9305-eb5bfb88811a/gerugugun.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a2639193-ecff-490e-8184-656724e7de5a/53597048669.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/74b79349-e956-48f7-bf68-caeeba9ea2dc/audre_lorde_short_stories.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_off0000f39c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF39C 5736 bytes
SHA-256: 861f60fd46a21b85ac7e63817b5452923dd091c9d3739d5ab234a7f1fea47ee7
font_01_sfnt_off0001070c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1070C 11356 bytes
SHA-256: 809eef1fa28fdfe4ba263430edc71433efcb0d58d1115bf1654671fb6feada5d