Malicious PDF — malware analysis report

Static analysis result for SHA-256 d522e6f2be9a4ce9…

MALICIOUS

PDF

80.3 KB Created: 2021-03-15 08:26:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: ae30f61b5db76790b0da42b2e6b8df6e SHA-1: 3baf115170a636bcef923f2f213cc776e366e257 SHA-256: d522e6f2be9a4ce9315e5fbefaf4bc6b78ab12ea81659064d00afc3747c324f0
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 0.9992

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://vilenefex.ru/strik?utm_term=lg+washer+wm3470hva+manual PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4376609/normal_604d2c1b4d5ae.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403820/normal_604ca0ac58a66.pdfIn PDF document text
    • http://rasipafus.getenjoyment.net/crimes_contra_a_administrao_pblica_resumo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4489981/normal_6023ffeec8e38.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369516/normal_5fffcae1f27ef.pdfIn PDF document text
    • http://piriveva.scienceontheweb.net/kipanorikemavoxuwom.pdfIn PDF document text
    • https://bugajikiwolano.weebly.com/uploads/1/3/4/4/134471946/bagipobiv.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375083/normal_604acaf2be4a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413126/normal_6014697a270de.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4475392/normal_60243e8216bb8.pdfIn PDF document text
    • https://wunamixexot.weebly.com/uploads/1/3/4/4/134456109/7558291.pdfIn PDF document text
    • https://ruwatavefi.weebly.com/uploads/1/3/4/7/134704280/nudumu-zipujowobijofu-lonogaludozo-jigotenaguz.pdfIn PDF document text
    • https://cdn.sqhk.co/dejuroli/igfhehh/fulakajalozoxuz.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369164/normal_5ff11df8a4392.pdfIn PDF document text
    • https://cdn.sqhk.co/xesoralo/DlDieji/46275605963.pdfIn PDF document text
    • https://cdn.sqhk.co/jagapifa/icojiij/hot_wheels_unlimited_game.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4402745/normal_5fdd47cfd6aa0.pdfIn PDF document text
    • https://likufugusatu.weebly.com/uploads/1/3/1/4/131406708/vikujojumove.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://vigavanoxe.onlinewebshop.net/introductory_econometrics_a_modern_approach_6th_edition_ebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73fcd335-95aa-4369-9b0d-5492b9d219d3/storyboard_free_app.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/67e7326c-cdd3-4abd-9c9c-3a2df3031d26/98414731508.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d14eab8-cd9b-46f3-9672-e3282ba63f7f/xuwelixamosaxev.pdfIn PDF document text
    • http://sogivuwe.onlinewebshop.net/dafodanovuba.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_off0000f99d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF99D 5664 bytes
SHA-256: 96267764dc596a576470c6c1d540f1398dc52490da9fdae53e12388208b64255
font_01_sfnt_off00010cdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CDF 11668 bytes
SHA-256: 0680561f25e8fbe0cb9052552b14b92b587ec89bccfc8cca05ec54e9e15b0cd7