Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ec22cc6804a03bf…

MALICIOUS

PDF

80.3 KB Created: 2021-04-20 20:25:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 6d3c963efa085ef7b2fd01007414b04b SHA-1: 940efe26c561990b95999db89054b67fd4ea2c0e SHA-256: 0ec22cc6804a03bfa584641ae6489b44e53ad8a9ac14e790dea9bb9709ff8ab7
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 0.9957

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://dugedepap.ru/strik?utm_term=what+does+red+light+on+gfci+mean PDF link annotation
    • https://cdn.sqhk.co/wofazexej/ehcFhji/mabapakagegen.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4493541/normal_602fdc1d40f83.pdfIn PDF document text
    • https://cdn.sqhk.co/zixedagiro/5hfhPge/ahl_hockey_scores_last_night.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483864/normal_602e0c5d31e5a.pdfIn PDF document text
    • https://vidowenabep.weebly.com/uploads/1/3/5/3/135322196/0240237a.pdfIn PDF document text
    • https://jetapixivokob.weebly.com/uploads/1/3/4/7/134726526/f15b2f6c9a747.pdfIn PDF document text
    • https://zapizurur.weebly.com/uploads/1/3/4/9/134900478/gowevebidu.pdfIn PDF document text
    • https://kisofoga.weebly.com/uploads/1/3/1/3/131383553/8313376.pdfIn PDF document text
    • http://jologedeb.getenjoyment.net/aisin_automatic_transmission.pdfIn PDF document text
    • https://dizakevusarebiz.weebly.com/uploads/1/3/4/5/134581037/5093826.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426828/normal_5fec3cc9d0cef.pdfIn PDF document text
    • http://kavademive.sportsontheweb.net/skyrim_how_to_make_bashed_patch.pdfIn PDF document text
    • https://fefefilax.weebly.com/uploads/1/3/2/7/132712664/6906470.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4453344/normal_606a9140c9ce2.pdfIn PDF document text
    • http://kewotij.mypressonline.com/what_is_dual_employment_law_in_india.pdfIn PDF document text
    • https://runumoviw.weebly.com/uploads/1/3/4/8/134854062/jodarikabej_povesiwomozuxo_miwetezolisifo_nutojad.pdfIn PDF document text
    • https://cdn.sqhk.co/fopeziriga/Rji0jgs/18085648606.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381108/normal_6053c8de7fe9f.pdfIn PDF document text
    • https://cdn.sqhk.co/kowumutajaw/bidihgi/34001044900.pdfIn PDF document text
    • https://nelejejo.weebly.com/uploads/1/3/4/8/134883178/difomub_gazada_mipujukano_wufaxorakutawu.pdfIn PDF document text
    • https://cdn.sqhk.co/bejamisokepu/zaSt2hh/2_player_games_pc_split_screen.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fidikaxano.myartsonline.com/vistaprint_business_card_template.pdfIn PDF document text
    • https://0adc25b5-51aa-4063-b16a-1f2a012ffc82.filesusr.com/ugd/23a6c3_8f3751fe997a4bedb990a0278a2c8316.pdf?index=trueIn PDF document text
    • https://8641c524-1fb5-4292-87ed-dd72f64d6c22.filesusr.com/ugd/9b7d8a_4c69321e85724f4f8ed6869d68ef6a55.pdf?index=trueIn PDF document text
    • https://e18e6c05-101e-4f41-9c4d-f518aea09dbb.filesusr.com/ugd/7972b3_230a5318c64348d1b4ca4977bd73ed59.pdf?index=trueIn PDF document text
    • https://32e47638-7206-44c1-ad53-5c6f9176402e.filesusr.com/ugd/e00742_ea9f00290ac04388a7cfcba84f779e02.pdf?index=trueIn PDF document text
    • https://6ba8113a-99dc-4618-97bf-d7180f10ff72.filesusr.com/ugd/b6edda_343a720d55b24ad39319307237864c1e.pdf?index=trueIn PDF document text
    • http://gajutar.onlinewebshop.net/editable_bingo_template.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_off0000f8ba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8BA 5448 bytes
SHA-256: f58d00f0c0262add5c285d85037cbd4f12913ba2ac5bb6f899271b00234934b3
font_01_sfnt_off00010b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B29 11216 bytes
SHA-256: cbf976918281643c32e9ac94a6ed3d2214e423f739c88fabca20957e5814c1b2