Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2d757f6242b7f0…

MALICIOUS

PDF

72.7 KB Created: 2021-02-18 19:50:58 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 6f2e1af1e837117ee0cae960c887c416 SHA-1: 3501fb4571f3370f9b72c0486cd5eb66c4c4fe43 SHA-256: 7f2d757f6242b7f0fe2acb5237fd783744aa0188f6e392eef2330941674e18f5
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://maypoin.ru/wix?keyword=cells+alive+animal+cell+worksheet PDF link annotation
    • https://sunivisoxeban.weebly.com/uploads/1/3/4/4/134493344/lawewa_werelus_dorafewid.pdfIn PDF document text
    • https://zekawumili.weebly.com/uploads/1/3/4/4/134403966/ropon.pdfIn PDF document text
    • http://egosikenclub.com/mepurikaj71oiq.pdfIn PDF document text
    • https://cdn.sqhk.co/kagurase/jd1egfD/85454576246.pdfIn PDF document text
    • http://umdtheatre.ru/60682082654op4n0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408478/normal_5fcda40fc0187.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4388052/normal_5fec3270d0d88.pdfIn PDF document text
    • https://cdn.sqhk.co/medasozuf/ijb0cjg/pirate_day_ideas_for_kindergarten.pdfIn PDF document text
    • https://rolosakuzorega.weebly.com/uploads/1/3/1/3/131379035/gelisifabezo-kokugajivasorav-sukuk.pdfIn PDF document text
    • http://testrun.ru/formalits_cession_de_parts_socit_civile5rx6u.pdfIn PDF document text
    • https://fuvobavan.weebly.com/uploads/1/3/1/6/131637325/fosorixomipevof-gavanajeg-kemefonejuf-xukupuvoruje.pdfIn PDF document text
    • http://autoupgrade.website/yaesu_ft_8800_modsw8tcr.pdfIn PDF document text
    • https://cdn.sqhk.co/sewuvavimebi/Rjggehc/dimomugufawegorotevise.pdfIn PDF document text
    • https://cdn.sqhk.co/supetuzitepi/NigjKT9/37314286745.pdfIn PDF document text
    • https://cdn.sqhk.co/wojusipi/4XahjCh/seronavagoporopivinopinu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385848/normal_5fd968070207f.pdfIn PDF document text
    • https://cdn.sqhk.co/gojelonub/ihBNliM/busoxamer.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367912/normal_5fd80cad78269.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_off0000e092.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE092 5160 bytes
SHA-256: 5f0db8ee44e51d6fc48282bf881ae3a9be8a35874b7b68c8030a6645e0b9cad1
font_01_sfnt_off0000f203.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF203 10384 bytes
SHA-256: aeed1cd168b0da86bfca8af01e1b4fa9a0f56022028d0b6aa8dba47e494f4ca1

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