Malicious PDF — malware analysis report

Static analysis result for SHA-256 a53f0596d3f18528…

MALICIOUS

PDF

72.9 KB Created: 2021-02-24 01:29:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 369af29ec4c6e900625b30e448dbe1f9 SHA-1: f8dc1873167b388e59196ae9a3de7df30e69ccf0 SHA-256: a53f0596d3f1852879381a5ac0c33243f8b9594b8da8f9813979c44ae0850991
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://bologen.ru/wix?keyword=ismrm+2020+abstract+deadline PDF link annotation
    • http://navaram.online/john_gba_lite_how_to_use_cheats579nr.pdfIn PDF document text
    • https://cdn.sqhk.co/jenetuwuda/haKyhhx/origami_box_easy_instructions.pdfIn PDF document text
    • https://cdn.sqhk.co/gafisasiwu/ggih5jJ/62818902185.pdfIn PDF document text
    • https://cdn.sqhk.co/lewuravasu/4Fk3jbM/prepaid_promos_du.pdfIn PDF document text
    • http://begdas.space/fons_and_porter_fussy_cut_templates2yxib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424330/normal_601fb8644989a.pdfIn PDF document text
    • https://cdn.sqhk.co/rularijulen/aiffA5h/app_that_can_download_music_with_lyrics.pdfIn PDF document text
    • https://cdn.sqhk.co/nefakovuwot/dgiHhc6/crashing_season_1_cast.pdfIn PDF document text
    • https://gifoxulexup.weebly.com/uploads/1/3/4/8/134865115/7869178.pdfIn PDF document text
    • https://sinukofulav.weebly.com/uploads/1/3/4/6/134634738/jipaput.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368736/normal_5fede9ef3c5b6.pdfIn PDF document text
    • https://cdn.sqhk.co/muvetowiripa/5hehhge/fvd_free_video_downloader_for_mozilla_firefox.pdfIn PDF document text
    • http://igcopyrightverify.com/design_of_mechanical_systems_bookmkf70.pdfIn PDF document text
    • https://piwutevuxave.weebly.com/uploads/1/3/4/8/134891910/xoziteri.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fejoxinivume.rf.gd/this_organelle_functions_in_cellular_respiration_answer.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_off0000e030.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE030 5436 bytes
SHA-256: 949403eba7fd30a8ee9629fd720d5087242bc8dd44e3f48d41885798927a99bc
font_01_sfnt_off0000f287.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF287 10732 bytes
SHA-256: e398102a2128d0f23f16f2542830abfd604c5da87f7f1369c2b243ab9ee7004e