Malicious PDF — malware analysis report

Static analysis result for SHA-256 908e4ca212658a6f…

MALICIOUS

PDF

137.6 KB Created: 2021-03-08 11:56:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-12
MD5: cc88d9e2b5ab117aa30af73fc782550c SHA-1: 69a1563ebcdf861b73db94d22fcba4a8b042f4b6 SHA-256: 908e4ca212658a6f52bc67a93188520c8d5e3b6592979b237ce17a40e3fd2ef0
186 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous external URLs pointing to various domains, including disposable hosting. The primary purpose appears to be directing users to potentially harmful content or manipulating search engine results.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

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://mezovuduw.ru/strik?utm_term=washington+wizards+best+players+2019 PDF link annotation
    • http://merokomazojewi.scienceontheweb.net/que_es_un_agente_de_ventas_y_sus_funciones.pdfIn PDF document text
    • https://cdn.sqhk.co/xovinexesun/hfhaics/pewefafegomekiridoka.pdfIn PDF document text
    • https://fetatoba.weebly.com/uploads/1/3/4/6/134689412/11727f52732.pdfIn PDF document text
    • https://fokepepepaxa.weebly.com/uploads/1/3/1/4/131483327/vevilubenenowak-kuridibabuf-vuberaw.pdfIn PDF document text
    • https://kesesitevon.weebly.com/uploads/1/3/5/3/135317357/8304009.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4485166/normal_603edfb912cad.pdfIn PDF document text
    • https://cdn.sqhk.co/putizimetiwe/gfKhiig/easter_sunday_briefing_uk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447258/normal_601972e4d189b.pdfIn PDF document text
    • https://cdn.sqhk.co/japokaxe/hhgjtoh/zepuwimatunuvugedosofom.pdfIn PDF document text
    • https://rovibabewovel.weebly.com/uploads/1/3/4/8/134884015/nuzesomaso_xevibekodinis_jelisijozo.pdfIn PDF document text
    • https://cdn.sqhk.co/mofijovelu/hhtgdir/world_of_darkness_books.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414332/normal_6024459b42ac0.pdfIn PDF document text
    • https://pimabebobi.weebly.com/uploads/1/3/2/3/132303226/zetutedatixotoxe.pdfIn PDF document text
    • https://vanizubifimid.weebly.com/uploads/1/3/0/8/130874516/c3634b4f2850.pdfIn PDF document text
    • https://cdn.sqhk.co/govizanorev/thiigid/green_pepper_soup_instant_pot.pdfIn PDF document text
    • http://kovuzaxaf.medianewsonline.com/25702980227.pdfIn PDF document text
    • https://cdn.sqhk.co/gukitane/qlIAgg9/chevy_trax_2018_manual.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374362/normal_5fdc42f0dc875.pdfIn PDF document text
    • https://cdn.sqhk.co/dixobiwi/Qhchjzh/freeze_dried_food_camping_canada.pdfIn PDF document text
    • https://zefukigu.weebly.com/uploads/1/3/4/7/134718507/duvikif.pdfIn PDF document text
    • https://cdn.sqhk.co/jutalufelex/fXvigij/new_all_creatures_great_and_small_cast_2020.pdfIn PDF document text
    • http://wotedogupowu.sportsontheweb.net/pearson_etext_algebra__trigonometry_10th_edition_by_sullivan.pdfIn PDF document text
    • https://cdn.sqhk.co/gotuxixovumu/xCPhaaN/download_samsung_secure_folder_for_pc.pdfIn PDF document text
    • http://lewijufe.sportsontheweb.net/2393432089.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473039/normal_600dd81db2743.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0001def9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1DEF9 6100 bytes
SHA-256: a3955328c5eb3ed5fda2bacf42096d26498ef65bcf51f57b2a6ceba16bb5f580
font_01_sfnt_off0001f3d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1F3D7 10720 bytes
SHA-256: 2f280f4691212f72260387cba31d0f37aad8d14211a916f895951eed5c3c7784