Malicious PDF — malware analysis report

Static analysis result for SHA-256 a8dc92c9f6fe3205…

MALICIOUS

PDF

75.0 KB Created: 2021-02-18 04:54:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 9f0b1e61cc9be201851ac771f21f5d0f SHA-1: dfcecc0f64fd564dd42ebad145fb59af621f74bf SHA-256: a8dc92c9f6fe320574f931ed11c8789c279d5f0a6257c43d1007f66faabcc723
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://jacksth.ru/wb?keyword=what%20are%20three%20major%20categories%20of%20economic%20indicators PDF link annotation
    • https://cdn.sqhk.co/jasurisunav/hjggVHb/91027110791.pdfIn PDF document text
    • https://cdn.sqhk.co/mujawiru/hj1yhgX/nostalgia_popcorn_maker_rkp630_manual.pdfIn PDF document text
    • https://kuxiwidozerapi.weebly.com/uploads/1/3/4/7/134728536/pinogumora_gujozulavedewi_pitomipik_poxub.pdfIn PDF document text
    • https://rozeravepirasaj.weebly.com/uploads/1/3/2/8/132816036/rigovez.pdfIn PDF document text
    • https://tizirabavapamob.weebly.com/uploads/1/3/1/4/131453045/suwosapuzufen.pdfIn PDF document text
    • http://rakuxijewimafud.22web.org/android_sdk_repository_bazel.pdfIn PDF document text
    • http://callipakk2.site/rasusenasojoxolabgwnfs.pdfIn PDF document text
    • http://criticcxck.space/rilukebamosasijetebbbysj.pdfIn PDF document text
    • https://garotilalu.weebly.com/uploads/1/3/0/7/130739336/63cf1ef94cb9020.pdfIn PDF document text
    • https://cdn.sqhk.co/zaliroded/5hdgfZW/winner_soccer_evolution_elite_mod_apk.pdfIn PDF document text
    • http://tikovg.xyz/409274338923lzxs.pdfIn PDF document text
    • https://nedetuvozuwe.weebly.com/uploads/1/3/4/6/134699612/4816803.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xelidamos.epizy.com/69482677003.pdfIn PDF document text
    • http://zabirozoxut.epizy.com/haccp_plan_template_restaurant.pdfIn PDF document text
    • http://nubuwij.epizy.com/specific_heat_chem_worksheet_16-1_answers.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_off0000e7db.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7DB 5492 bytes
SHA-256: 0eefcf5628838cdc7602ea4457e38d79fff3fa3ee6a68a9ccc8750bd9294b154
font_01_sfnt_off0000fa71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA71 10708 bytes
SHA-256: c553b83e3291c9e52c87532761a114479c069605fb25cef427d8eaee87cb5659