Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b87fa70a57aad48…

MALICIOUS

PDF

71.3 KB Created: 2021-02-24 20:24:53 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: ce0a3ec65d7a4918d95b42a15177540a SHA-1: d688eee3dfd844205fe5c4e5eb999a894d74005c SHA-256: 7b87fa70a57aad483d29c15c022b16ee8cff5107090941ffec1256f3b1b1c32c
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://bologen.ru/award?keyword=kingdom+hearts+1.5+guide+pdf PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4494668/normal_60062e3d2af4d.pdfIn PDF document text
    • https://cdn.sqhk.co/nutewakizi/bghhgji/padasetun.pdfIn PDF document text
    • http://xojuxelase.medianewsonline.com/arduino_programming_reference.pdfIn PDF document text
    • https://cdn.sqhk.co/raxoxawupej/hcGYhdH/10385094785.pdfIn PDF document text
    • https://xajekedifa.weebly.com/uploads/1/3/4/4/134469171/dibijunusijogi.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4451225/normal_5ffd655e31ec4.pdfIn PDF document text
    • https://riwivuzis.weebly.com/uploads/1/3/4/2/134265818/zevuta-mavuzezemulofo-pitajuguja.pdfIn PDF document text
    • https://menudobuwowewil.weebly.com/uploads/1/3/4/7/134765252/7a9e2.pdfIn PDF document text
    • https://wupixizot.weebly.com/uploads/1/3/5/3/135398135/7145546.pdfIn PDF document text
    • https://ronupajowosoza.weebly.com/uploads/1/3/4/8/134871490/moxinawelas.pdfIn PDF document text
    • https://pijusutuwo.weebly.com/uploads/1/3/1/4/131407307/roxulogomeborajuximo.pdfIn PDF document text
    • https://cdn.sqhk.co/baluwofuk/egfgjRj/80164534590.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413242/normal_602018528b22f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379718/normal_5fc63af9eeb0d.pdfIn PDF document text
    • https://cdn.sqhk.co/xarozowuzosa/gXphi8i/91729930243.pdfIn PDF document text
    • https://cdn.sqhk.co/dabozijide/ENbK7ib/afterburner_arcade_game_for_sale.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474448/normal_5fd84d525bb38.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_off0000d975.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD975 5600 bytes
SHA-256: 528dbdf983c63fab5b5c18009890a3c61763854d04762b8cdd15ea7a086c0fd4
font_01_sfnt_off0000ec6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC6F 10392 bytes
SHA-256: 05a057eede18e72dca330c36e42a29b15690a4e498c4ecd374600d75ff9bd8e7

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