Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f76783ff98913a…

MALICIOUS

PDF

70.0 KB Created: 2021-03-02 17:22:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: 2d3f9b8a29841dc5e1304244f9cd379d SHA-1: 20e4fdf085d313f5475b0caeb119172ebe24e27b SHA-256: c2f76783ff98913a102393534e6a1203ac49dee538562297b0724b35af0f7cb3
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://baarspo.ru/wb?keyword=dapple%20gray%20horse%20images PDF link annotation
    • https://cdn.sqhk.co/tusifefovozu/bJdjdGQ/tips_gold_for_koala_challenge.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370064/normal_601612345ae47.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4501385/normal_5fdbe59b8d510.pdfIn PDF document text
    • https://gatepeduvemixif.weebly.com/uploads/1/3/4/6/134669895/935b5f7.pdfIn PDF document text
    • https://gadikidaju.weebly.com/uploads/1/3/1/3/131379663/kijamisor-fawir-fadatuv-tagavobujelanas.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383451/normal_6016613984cb6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389820/normal_603af9b26fe94.pdfIn PDF document text
    • https://puzelosepe.weebly.com/uploads/1/3/5/3/135317481/8495159.pdfIn PDF document text
    • https://dazuzoboda.weebly.com/uploads/1/3/4/0/134017564/viwaz.pdfIn PDF document text
    • http://medyayazilimtr.com/50305223448ftpsm.pdfIn PDF document text
    • https://pobapuzelikawe.weebly.com/uploads/1/3/0/7/130739661/1171409.pdfIn PDF document text
    • https://satufimitu.weebly.com/uploads/1/3/4/7/134715308/rupex_gubutapepogow.pdfIn PDF document text
    • http://kunujunekedi.mygamesonline.org/sony_bdv-e3100_3d_blu_ray_home_theater_system.pdfIn PDF document text
    • https://gonupedifi.weebly.com/uploads/1/3/4/5/134524362/butiwob.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/xogametanudorixinufob.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_off0000d4ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD4AD 5332 bytes
SHA-256: 72a50ea98d245e531ade80aae6960d355f83900d258b5ab4603cb41499c46eeb
font_01_sfnt_off0000e6b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE6B5 10772 bytes
SHA-256: dc20d7fa597fab23a98a6ec30bf27d3e940717c56a9d183e7b0c75ef87a16427