Malicious PDF — malware analysis report

Static analysis result for SHA-256 a2121e9296162a08…

MALICIOUS

PDF

69.3 KB Created: 2021-02-25 13:26:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: d8a5f37bcfe3b4bfd64d2888857005e3 SHA-1: e085be2abbc6680c6843f6604b67911457f5589a SHA-256: a2121e9296162a0865a522af2e584494f857a16e41043cdaaf2e5e397464c56f
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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://yafferge.ru/award?keyword=meade+telescopes+uk+prices In PDF document text
    • https://cdn-cms.f-static.net/uploads/4481408/normal_600d82701dbcc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4448100/normal_6031f6abd8cf2.pdfIn PDF document text
    • https://dopotalufiru.weebly.com/uploads/1/3/4/6/134601398/7008197.pdfIn PDF document text
    • https://leditolovon.weebly.com/uploads/1/3/2/6/132682688/787fb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407994/normal_601b9adb85654.pdfIn PDF document text
    • http://vubitim.sportsontheweb.net/escuelas_sistemas_y_corrientes_de_la_psicologa_contempornea.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/xogametanudorixinufob.pdfIn PDF document text
    • http://fawikenaxalu.scienceontheweb.net/foretoxafalikibip.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4392218/normal_5ff64b39e7484.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4530578/normal_602ed79032e54.pdfIn PDF document text
    • https://tarezusubem.weebly.com/uploads/1/3/5/3/135386237/3265500.pdfIn PDF document text
    • http://rowowesofazov.medianewsonline.com/33373187469.pdfIn PDF document text
    • https://budozawepolok.weebly.com/uploads/1/3/4/8/134852557/tiduroxo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • http://jezevenakos.myartsonline.com/torewadefewamit.pdfIn PDF document text
    • http://fixiwerasame.rf.gd/telugu_bahubali_mp4_hd_songs.pdfIn PDF document text
    • http://zupitatip.atwebpages.com/15697329981.pdfIn 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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6b1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6B1 4912 bytes
SHA-256: c2dc005ed66ce01d1e4c826f1a77667aeaf3a5b931159877b1686b4e67aada21
font_01_sfnt_off0000d77c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD77C 10400 bytes
SHA-256: 440c968cf3ddb79be6c83110c80fdedc4ae4d838cd1f5b6dbc9eca732a7999ec
font_02_sfnt_off0000fa57.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA57 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3