Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22ae5091649d8fa…

MALICIOUS

PDF

71.4 KB Created: 2021-02-12 02:42:52 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 4ef9b1ae8cc22278fdc09b7dc758f3d9 SHA-1: a320dc2dec99fec269f1a811ff2b7d3478537854 SHA-256: b22ae5091649d8fae790c23f36abac25a2ae431ed697896efb1b2c5161695eec
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/wb?keyword=windows%207%20build%207601%20activator PDF link annotation
    • https://tulovituvo.weebly.com/uploads/1/3/4/2/134234708/3d546bc6b1.pdfIn PDF document text
    • https://zasuzepomuban.weebly.com/uploads/1/3/4/6/134627511/fokidugi.pdfIn PDF document text
    • http://deruvakibifazo.iblogger.org/uniform_building_by_law_malaysia.pdfIn PDF document text
    • https://gefatute.weebly.com/uploads/1/3/5/3/135345711/7d9ab4613da.pdfIn PDF document text
    • https://wudigunufite.weebly.com/uploads/1/3/4/6/134611509/a5a82.pdfIn PDF document text
    • https://rowozone.weebly.com/uploads/1/3/2/7/132740293/gigakida-kakojafegeped-rafeserubumi.pdfIn PDF document text
    • http://zebaxuf.iblogger.org/ts_ecet_allotment_order.pdfIn PDF document text
    • http://zunugopubudo.22web.org/57794468896.pdfIn PDF document text
    • https://zoparidozuxeb.weebly.com/uploads/1/3/5/3/135390671/96906.pdfIn PDF document text
    • https://gagegopered.weebly.com/uploads/1/3/4/8/134880179/7afd6f66.pdfIn PDF document text
    • https://mokabeninenaji.weebly.com/uploads/1/3/4/0/134013120/tuzosoxata.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://zikinevubebera.epizy.com/reflection_mulan_cello_sheet_music.pdfIn PDF document text
    • http://wuzuvulas.epizy.com/spatial_analysis_in_r.pdfIn PDF document text
    • http://lamekukibudinos.epizy.com/tavubakarotozazu.pdfIn PDF document text
    • http://duposul.epizy.com/80157833536.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_off0000d525.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD525 5664 bytes
SHA-256: 705adbe95689d9bcee27272eefbc259c7d391fdd0e369a328cdb7794b3048481
font_01_sfnt_off0000e89f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE89F 12724 bytes
SHA-256: 8494c36688f8a4358db3ccabfbf8993f41391fad5598093295ed1cdd0c9186c9