Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b4e447c94bea21f…

MALICIOUS

PDF

65.0 KB Created: 2021-02-15 04:10:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 525b2e518e54ec344675c25c980ed471 SHA-1: 1672bb2a04a1c2ec267e1cc08f9b932217eb494e SHA-256: 0b4e447c94bea21f38e630b0afabab98d1743c2c75bc76941bb5a4bee240f3a6
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://leonvi.ru/wix?keyword=world+of+chemistry+textbook+answers PDF link annotation
    • https://fibunijir.weebly.com/uploads/1/3/0/7/130740490/66a2b4efa.pdfIn PDF document text
    • https://cdn.sqhk.co/sofuxizago/Lhdheid/stokke_tripp_trapp_high_chair_manual.pdfIn PDF document text
    • http://richteam.site/division_with_pictures_worksheetzofcj.pdfIn PDF document text
    • http://tonagruz.ru/heroes_bowie_piano_sheet_music0jzu1.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454967/normal_5fcf202743328.pdfIn PDF document text
    • https://kenomuxi.weebly.com/uploads/1/3/4/0/134042647/fokubuxe.pdfIn PDF document text
    • https://cdn.sqhk.co/kuzefoke/hiLVuqz/capsaicin_weight_loss_supplement.pdfIn PDF document text
    • http://trenketo.buzz/top_10_bollywood_songs_320kbps1h7pv.pdfIn PDF document text
    • https://cdn.sqhk.co/kowukogifaw/iigiUhj/bugsy_siegel_death_house.pdfIn PDF document text
    • https://cdn.sqhk.co/kopilixa/bEIzhiI/61944802447.pdfIn PDF document text
    • https://samoderusewon.weebly.com/uploads/1/3/1/3/131383586/d40fa0741fb8.pdfIn PDF document text
    • https://fubomagasikeka.weebly.com/uploads/1/3/4/4/134474343/5f8cbf75c5cd.pdfIn PDF document text
    • https://cdn.sqhk.co/diwewiduvaz/bCCchje/snake_identification_chart_florida.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392661/normal_6029c633d1ca1.pdfIn PDF document text
    • http://zhigina.ru/canon_eos_rebel_t5_manualaaiqc.pdfIn PDF document text
    • https://lofokuvowuvi.weebly.com/uploads/1/3/4/3/134362742/wutobavogibe.pdfIn PDF document text
    • https://cdn.sqhk.co/wituruxa/WAiddhi/nerako.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_off0000c007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC007 5740 bytes
SHA-256: dce3025bd86456897256426782c8c21d77020ec7d819f73b86f85b6feecbc5a9
font_01_sfnt_off0000d383.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD383 10036 bytes
SHA-256: 751290969adc8cb6e11af7ed28cd6891e5fa118cb2be0dfb7ca0ddeaea76473b

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