Malicious PDF — malware analysis report

Static analysis result for SHA-256 e8a2068a1a0c0ab8…

MALICIOUS

PDF

72.2 KB Created: 2021-03-14 20:58:19 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: 5960dfc8a49bc724d4eac8826ba7710b SHA-1: 43f0d7d660270de0d1ac077ef874eddc93daba6d SHA-256: e8a2068a1a0c0ab82164ac712d0e3eb51f8a06f0879954006040e97676e2602f
186 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous external links, many pointing to disposable domains, suggesting a link farm or SEO manipulation tactic. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or a trojan. While no scripts were explicitly extracted, the PDF structure and external links are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://gimoguvi.ru/wix?keyword=calculus+help+websites PDF link annotation
    • http://gupirigugorixuf.sportsontheweb.net/lobazokatevigowobube.pdfIn PDF document text
    • http://bestplacefor.rest/phenomenological_research_methods_moustakasphhqf.pdfIn PDF document text
    • https://cdn.sqhk.co/xavaxonad/ghx5hhr/riwedo.pdfIn PDF document text
    • https://lulegosepo.weebly.com/uploads/1/3/0/9/130969478/tabutatetake-jibodax-pirupinuroxis-rigizuzu.pdfIn PDF document text
    • https://cdn.sqhk.co/muzexeragod/diN7ig0/free_texas_holdem_poker_no_download_no_registration.pdfIn PDF document text
    • https://cdn.sqhk.co/sexipemajim/ShbHhcz/night_jungle_hd_wallpapers.pdfIn PDF document text
    • http://ketaton.mywebcommunity.org/41015543312.pdfIn PDF document text
    • http://reduslim-siteofficial.site/6884452024mbyl0.pdfIn PDF document text
    • https://cdn.sqhk.co/wugunifikezu/diifhiV/gamestart_pixel_battle_mod.pdfIn PDF document text
    • https://midumusifefo.weebly.com/uploads/1/3/5/4/135401272/sunoramuzozeg.pdfIn PDF document text
    • http://hurricane1.space/tp-link_wr841n_wifi_repeatera2p92.pdfIn PDF document text
    • https://cdn.sqhk.co/votiwixuduzo/jcox8q4/word_finder_app.pdfIn PDF document text
    • http://instapodarok365.site/paguzbgrvl.pdfIn PDF document text
    • https://cdn.sqhk.co/busosuwik/1djb0vG/gigowifar.pdfIn PDF document text
    • https://cdn.sqhk.co/masamiwe/Ngfgijg/hot_wheels_id_cars_orange_track.pdfIn PDF document text
    • http://prizinsta365.website/33410161774deqy7.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/hJqVuhi/the_parenting_simulator_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/nimabugokofa/hmD5xge/kofizisulavoxisiraratubut.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://jigisasamupor.onlinewebshop.net/3699788733.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/40067000676.pdfIn PDF document text
    • https://s3.amazonaws.com/donarepemi/32037904646.pdfIn PDF document text
    • http://kaxuwenewutexu.myartsonline.com/66817048047.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/instagram_video_by_link_online.pdfIn PDF document text
    • http://xurosuforudev.atwebpages.com/what_does_the_serenity_prayer_mean_in_the_bible.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_off0000dca6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDCA6 5060 bytes
SHA-256: ac14b6061a7e07e464e9d101e120cb90c2a5fee10ed1af59af6c00720a13d691
font_01_sfnt_off0000ede2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDE2 10956 bytes
SHA-256: 973157b3b3ed95d7656b6eb83dc2a846426bb41fa75302a0332b365dfb0b07b4