Malicious PDF — malware analysis report

Static analysis result for SHA-256 612e229bc279d29d…

MALICIOUS

PDF

82.9 KB Created: 2021-04-05 15:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 17dd5cce73cef005752b5b9d56814721 SHA-1: 7fc52d3f9af8c55eebd4d1097f723e48d944f4c7 SHA-256: 612e229bc279d29dfdea6e19af253d55f9436b317f40afe66fa39d8483ed99b9
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with a primary focus on `https://jumiwimov.ru/wix?keyword=fallout+new+vegas+performance+tweaks`. Heuristics indicate this PDF is part of a link farm hosted on disposable domains, suggesting a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 5

  • 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 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/wix?keyword=fallout+new+vegas+performance+tweaks PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4426062/normal_5fe7e6bcb4892.pdfIn PDF document text
    • https://muwikilakejo.weebly.com/uploads/1/3/4/5/134519857/zenekifapeluvos.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4384164/normal_5fcf318f64dc0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424405/normal_5fcbf3cd61072.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4381320/normal_5fe04d3b11096.pdfIn PDF document text
    • https://dexajuvado.weebly.com/uploads/1/3/4/4/134470202/bozagopadimi.pdfIn PDF document text
    • http://lokubakodo.getenjoyment.net/uefa_champions_league_2020_19_schedule.pdfIn PDF document text
    • https://wojedebaroz.weebly.com/uploads/1/3/1/6/131637691/jofapuwepogav_welaj_kawudul_tanoxe.pdfIn PDF document text
    • https://kekerisasil.weebly.com/uploads/1/3/0/7/130775365/vizagese.pdfIn PDF document text
    • https://xurarasetar.weebly.com/uploads/1/3/4/0/134096945/9223615.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4490264/normal_5fd1fd43accd3.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4447437/normal_5fcbab0fc8912.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4476566/normal_606960b998a1f.pdfIn PDF document text
    • http://gopusoduj.mygamesonline.org/83037140151.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368975/normal_60465eccee6de.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
    • http://lunodemexixape.epizy.com/gy6_150cc_carburetor_needle_adjustment.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43d81935-f444-4f24-8a5d-12bdf31e450e/17828079798.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5b98760c-5ad5-4fef-a529-27d50d6e97eb/how_to_put_a_spalding_basketball_hoop_together.pdfIn PDF document text
    • http://raguguk.epizy.com/learn_opencv_python.pdfIn PDF document text
    • http://jatijunulefare.epizy.com/89018186828.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e22073ea-a080-474a-aeef-109c7a902635/fawururimirumagejamaz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c0837eb1-25e1-453d-bde3-2a8a788e9316/sakamife.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f6e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF6E6 5340 bytes
SHA-256: f6a1caf49ff4703b8f7aeff63ce7e68ba795b74ea1bb8e0040f9893abd3686e0
font_01_sfnt_off00010924.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10924 10976 bytes
SHA-256: 42ac0d676b48206129c33a4bd7be4df74ee8e18e92bfbfbdc88d3dd7b5c0ccab
font_02_sfnt_off00012e72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12E72 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c