Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca72b3bc09554382…

MALICIOUS

PDF

77.4 KB Created: 2021-03-06 23:04:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: b843fba269623c68286ee1e06ed15c5e SHA-1: b915b12387db0468ff8f4e71342771e1955debd2 SHA-256: ca72b3bc0955438249399db97dfb9b4ac3d650707185f41971e96d4071504c5a
186 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. It contains a large number of external links, many hosted on disposable domains, suggesting a link farm or SEO spam operation. The embedded URLs point to various topics, including technical subjects and software downloads, which are likely lures to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://lozipotod.ru/award?keyword=tcp+ip+model+and+osi+model+difference PDF link annotation
    • https://cdn.sqhk.co/ripowusaro/jjzL6he/space_force_uniforms_us.pdfIn PDF document text
    • http://onlinetyz.xyz/what_qualifications_do_you_need_to_be_an_animatorrmljv.pdfIn PDF document text
    • https://cdn.sqhk.co/papebikuwi/hdsONHc/93236006419.pdfIn PDF document text
    • https://cdn.sqhk.co/viwiratoposu/ghdgGje/super_screen_recorder_no_root_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/bikakigiben/EXibLgh/pick_me_up_mod_apk_hack_download.pdfIn PDF document text
    • http://fbdirect.site/remington_ultimate_50_caliber_stainless_bolt_action_muzzleloader_-_26inx24tv.pdfIn PDF document text
    • https://cdn.sqhk.co/dafibuxoki/NgiGEhi/2ndline_second_phone_number_mod_apk.pdfIn PDF document text
    • http://zavarivaemvmeste.ru/fnb_ewallet_daily_withdrawal_limitbtuuo.pdfIn PDF document text
    • http://ujjjrrrrr.space/mavejekeperadasesovoi8uc1.pdfIn PDF document text
    • https://diwifiburu.weebly.com/uploads/1/3/4/8/134871147/jugavitutafugufewo.pdfIn PDF document text
    • https://seduzitatadobi.weebly.com/uploads/1/3/4/3/134371103/vorudubo_valuluku.pdfIn PDF document text
    • https://cdn.sqhk.co/ribafesupuro/jeWQuwK/hd_4k_wallpaper_for_umbreon.pdfIn PDF document text
    • https://cdn.sqhk.co/fovulifavu/hfmATvW/51226501957.pdfIn PDF document text
    • http://bbflowers.net/gepujeloserikojekeccly7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4426550/normal_5fd85f1d9a98c.pdfIn PDF document text
    • http://ukranews.icu/tisizosamufaku16e.pdfIn PDF document text
    • http://detonicro.website/6433259272bh2yz.pdfIn PDF document text
    • http://cafe-cok.ru/d_d_3.5_complete_character_sheet_google_docs0i7tp.pdfIn PDF document text
    • http://kmplitka.shop/2005_honda_accord_maint_reqd_light_resetp6s7r.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4489061/normal_5ff02a1e90fb8.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4481162/normal_5fe505d6aaac7.pdfIn PDF document text
    • https://cdn.sqhk.co/zodavujera/hhopOhd/la_novelita_aventura_letra.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_off0000f420.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF420 5248 bytes
SHA-256: dbae3d35607463df0462976568fc845ea60d62595bb36b89b0f5abf2ed8de68c
font_01_sfnt_off000105e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105E1 10032 bytes
SHA-256: 879fa0b4e016896c9a25f736411b871f91757079a84ee3e93a0760b5b2aec670