Malicious PDF — malware analysis report

Static analysis result for SHA-256 bd8bb42ac72a2029…

MALICIOUS

PDF

67.5 KB Created: 2021-02-24 00:08:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 6b1ce956cd2ec869493f71b11072f855 SHA-1: c16b3df8c4e2b37bf4b38b5d7c2ed9702484331d SHA-256: bd8bb42ac72a202956c5cd64a895be3da1243c93c4001f5206dc800da12f0e5d
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/123?utm_term=the+american+history+book+mcdougal+littell+pdf PDF link annotation
    • https://pakefipeve.weebly.com/uploads/1/3/4/0/134017053/zajavutom_datiz_jagimakebal_xakugutobumit.pdfIn PDF document text
    • https://cdn.sqhk.co/karadirimose/ehajghf/45989561877.pdfIn PDF document text
    • https://nanagupuwaxa.weebly.com/uploads/1/3/5/3/135322083/jilojomezenobamo.pdfIn PDF document text
    • http://vannabanyavsedela.xyz/laser_tag_quest_near_meijywl.pdfIn PDF document text
    • https://sojuseruk.weebly.com/uploads/1/3/4/3/134367588/2efb269b39a9d1a.pdfIn PDF document text
    • https://cdn.sqhk.co/ruwonumatag/s9hfghG/30917288617.pdfIn PDF document text
    • https://cdn.sqhk.co/vibisidumes/q6Xichh/nivebojogulonujawidelir.pdfIn PDF document text
    • https://litovabijoku.weebly.com/uploads/1/3/4/6/134666457/lititubizepasinawipi.pdfIn PDF document text
    • https://falojaba.weebly.com/uploads/1/3/0/7/130776150/bf50d.pdfIn PDF document text
    • https://cdn.sqhk.co/jetirivotu/Pjchdih/47396589840.pdfIn PDF document text
    • https://xomitemekebok.weebly.com/uploads/1/3/4/8/134881854/wenixozonet.pdfIn PDF document text
    • https://fabofosozani.weebly.com/uploads/1/3/4/8/134870462/suputokuvufoxe.pdfIn PDF document text
    • https://cdn.sqhk.co/tobowovum/h47hjqp/tetubebiwazijikepevupi.pdfIn PDF document text
    • https://cdn.sqhk.co/xakurusuk/tjf4jjE/zombie_hunt_online_game.pdfIn PDF document text
    • https://cdn.sqhk.co/kinibemazoz/jbhAghJ/mini_dachshund_weight_at_8_weeks.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_off0000ca2d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCA2D 5824 bytes
SHA-256: b49ffce29c45d1e0c705a6b21a1f4c765e3cd5a83bf0a2367812bd9d671fe588
font_01_sfnt_off0000ddd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDDD4 10220 bytes
SHA-256: 596b7c3435dd8e223c1fac6399e7b47e0a0ab560c915c4c218e608697e7bf7d3