Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c85e8094f164f6f…

MALICIOUS

PDF

69.0 KB Created: 2021-02-17 00:55:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-03-31
MD5: 5204ce1bc6673203cb8d3652574116bf SHA-1: 36345c98f05325b1aebc6361a63a1b8ec3dde7a1 SHA-256: 9c85e8094f164f6ff2aa75554f483409333f5fee693605aa91be00fe70d9c6be
226 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Image-heavy PDF with invisible link to suspicious domain high PDF_SUSPICIOUS_LINK_LURE
    PDF is a small image-heavy lure with invisible link annotations that send the user to a suspicious high-risk-domain URI. This matches credential-phishing carriers where the visible document is only a prompt and the real collection flow happens on the linked website.
  • 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://jacksth.ru/wb?keyword=2001%20lexus%20is300%20manual%20swap PDF link annotation
    • https://cdn.sqhk.co/miwataxanis/Kzjaje8/67338051364.pdfIn PDF document text
    • http://derikibavuji.22web.org/chocolate_malayalam_movie_songs_ming.pdfIn PDF document text
    • https://severuzilun.weebly.com/uploads/1/3/4/7/134710190/tewesewi.pdfIn PDF document text
    • http://com-login8.xyz/fizokifagepugipopurazudarjgk54.pdfIn PDF document text
    • https://cdn.sqhk.co/palevisi/igsIghc/44542344802.pdfIn PDF document text
    • http://instapriz24.site/teredemua4yvr.pdfIn PDF document text
    • http://bodyita.space/fagenofufokajelync.pdfIn PDF document text
    • http://rawenspant.online/95833069299v2dsx.pdfIn PDF document text
    • http://politach.com/jufapisajovozuroxasowomednncl.pdfIn PDF document text
    • http://ig-mediateam.net/xupixuruwabuahdv.pdfIn PDF document text
    • https://cdn.sqhk.co/zizaratijiga/djiBifp/love_roses_stickers_for_whatsapp_kiss_gif.pdfIn PDF document text
    • http://alifan.store/788802517972z8va.pdfIn PDF document text
    • https://cdn.sqhk.co/wolebiduju/xighhxU/splashtop_2_remote_desktop_apk.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://bonagofej.epizy.com/aha_resuscitation_guidelines_2018.pdfIn PDF document text
    • http://zisufabelez.epizy.com/49213209676.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd50.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD50 5424 bytes
SHA-256: 0fe0906103da33d605097b730cf385f25ce0231fcc0614be79b319b93c4014e0
font_01_sfnt_off0000dfca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFCA 11060 bytes
SHA-256: 287ddcb262bea97c81cf1a4a10f56c275f367cd9b0f4ec4b08dcf744ba82ece0