Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df0311c42d2e6b4…

MALICIOUS

PDF

65.8 KB Created: 2021-02-25 01:22:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 7eae369e4367ce07759f13b7a9a7e928 SHA-1: 5a3c0e9b4019948e9bed074470bfd4dd9c9f1762 SHA-256: 8df0311c42d2e6b4fadd2a13925c67b4f94449a2d5f332d22708d76e4b1835a3
244 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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://crophysi.ru/wix?keyword=currents+and+climate+worksheet+answer+key In PDF document text
    • https://pujatafar.weebly.com/uploads/1/3/4/8/134854232/kenafobizu.pdfIn PDF document text
    • https://foxetevuleludo.weebly.com/uploads/1/3/4/8/134859937/1352064.pdfIn PDF document text
    • https://nebomigefut.weebly.com/uploads/1/3/4/3/134359696/xiluwujod.pdfIn PDF document text
    • https://golakabuzoved.weebly.com/uploads/1/3/4/8/134870140/nikinuxowapawaruru.pdfIn PDF document text
    • https://cdn.sqhk.co/suzeboxiwo/gjNvFhd/wijijidiwobesepiromosalo.pdfIn PDF document text
    • http://rugegav.mywebcommunity.org/ditafizo.pdfIn PDF document text
    • https://cdn.sqhk.co/juxerawabuf/ggu72ii/31730633045.pdfIn PDF document text
    • https://cdn.sqhk.co/fekigimuzib/iexhhhj/jugs_bowling_machine_speed_chart.pdfIn PDF document text
    • https://kokilanoru.weebly.com/uploads/1/3/4/0/134012510/babim.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481286/normal_5fd077ed03510.pdfIn PDF document text
    • https://zodekunomaxuj.weebly.com/uploads/1/3/0/7/130739112/wafukabotatif.pdfIn PDF document text
    • http://riwotivadejud.sportsontheweb.net/73255167513.pdfIn PDF document text
    • http://fisareboveda.getenjoyment.net/28436485991.pdfIn PDF document text
    • https://verumoxozuvije.weebly.com/uploads/1/3/1/4/131407377/nijakipusifemepi.pdfIn PDF document text
    • https://sotugipuzelaj.weebly.com/uploads/1/3/0/7/130738723/bubosefotulelaru.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_off0000c6a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6A7 5344 bytes
SHA-256: 8e26165d5a8a93d04a5b7164b580b242357b2c3c447cbb73c86d08685687ce0f
font_01_sfnt_off0000d8b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD8B8 9816 bytes
SHA-256: a59234570edede33684ee5187e5d9c66ce409740ee301559461c9d8cdf16cc74

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