Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f5fb715125d71c…

MALICIOUS

PDF

105.3 KB Created: 2021-03-24 12:50:08 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: e641cf79156a310334184669b16fe99a SHA-1: 24bcbe5c68131063a7eb062f55723738614ce0b9 SHA-256: 34f5fb715125d71c31def1a0947d211ee9553998bdcb904150675de2dc980809
186 Risk Score

Malware Insights

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

This PDF document functions as a link farm, directing users to numerous external websites under the guise of search results. The primary URL, https://botokaw.ru/strik?utm_term=what+is+the+weight+limit+for+a+power+wheels, suggests a deceptive lure. The presence of multiple links on disposable hosting and the ML classifier's high confidence score indicate a phishing or malicious redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://botokaw.ru/strik?utm_term=what+is+the+weight+limit+for+a+power+wheels PDF link annotation
    • https://bezumovepefare.weebly.com/uploads/1/3/5/3/135337037/dorirutedavonudi.pdfIn PDF document text
    • http://vurujupafowutox.mypressonline.com/concepto_de_neologismo.pdfIn PDF document text
    • https://cdn.sqhk.co/xupodafib/hrIEhb2/download_game_my_talking_panda.pdfIn PDF document text
    • http://kolekewoni.mywebcommunity.org/nonanugawipi.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/FJhjjbO/diced_menu_calories.pdfIn PDF document text
    • http://dorulezebum.sportsontheweb.net/sutupapafulewegudikun.pdfIn PDF document text
    • https://rodofuzox.weebly.com/uploads/1/3/4/5/134599037/123114.pdfIn PDF document text
    • http://vitofemegawe.getenjoyment.net/how_to_reset_casio_solar_watch.pdfIn PDF document text
    • https://demijogukif.weebly.com/uploads/1/3/1/3/131382539/5049512.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459792/normal_5fe81b1ac3165.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417325/normal_5fe823aa98176.pdfIn PDF document text
    • https://cdn.sqhk.co/texonatuzi/hzmh3kE/javuvotolagonorezed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4487903/normal_60461b6d98068.pdfIn PDF document text
    • https://cdn.sqhk.co/fozozumaj/n0dJjg6/45204176720.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c3a7a64c-5591-430b-94d7-c2eadfdf3523.filesusr.com/ugd/966478_c1b9c6552ac543658e64cd12eaacd576.pdf?index=trueIn PDF document text
    • https://4b67404f-136a-46a0-9cf3-151f2d38faab.filesusr.com/ugd/241fd5_6c48214dbcf343578e4cb5aa1deeedf6.pdf?index=trueIn PDF document text
    • http://kimoviranonaf.onlinewebshop.net/vocabulary_words_with_urdu_meaning_and_sentences.pdfIn PDF document text
    • http://kadizilurojiniz.onlinewebshop.net/precalculus_book_online.pdfIn PDF document text
    • https://0e733887-fd72-4d21-8b10-0a39cafbc931.filesusr.com/ugd/1e4d10_6e472358de394b21abeaaecef2d86436.pdf?index=trueIn PDF document text
    • https://c064424b-11a8-4e39-a524-24a74bcd733d.filesusr.com/ugd/54e393_2047a28c830b49199062249758a95341.pdf?index=trueIn 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_off00015c9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x15C9F 5420 bytes
SHA-256: 539ae5254d398813d5c47f5ed0c3ab101e3b8c79ae4ed0bd10091797042357b2
font_01_sfnt_off00016efe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16EFE 11852 bytes
SHA-256: 6a2e4c1c5c79ca31b172343749aa887f70bc9976a8110d272052e8a326adfe3b