Malicious PDF — malware analysis report

Static analysis result for SHA-256 b5f23bdad920ed3f…

MALICIOUS

PDF

66.7 KB Created: 2021-02-25 03:09:56 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 058d73b1f94fa3322c2f0450cf285958 SHA-1: 61eb06e50c146833089a05a96638a9c843270e87 SHA-256: b5f23bdad920ed3fb460d3d19cab5c0c945dfaa6e58c1a1b64765ea7dbc80ae8
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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=vocab+level+g+unit+12+synonyms+and+antonyms+answers PDF link annotation
    • http://zapajewoda.22web.org/nuwinazajodu.pdfIn PDF document text
    • https://mivagadak.weebly.com/uploads/1/3/4/5/134599435/3956787.pdfIn PDF document text
    • https://cdn.sqhk.co/mebosuxular/DdMjbyr/necromancer_staff_build_gw2.pdfIn PDF document text
    • http://xokodiraki.22web.org/dubasulovodobipaz.pdfIn PDF document text
    • https://cdn.sqhk.co/wodelaganav/jhZngjT/fun_cheats_for_sims_4_xbox_one.pdfIn PDF document text
    • http://xisalokowifob.22web.org/arithmetic_sequence_algebra_2_worksheet.pdfIn PDF document text
    • https://cdn.sqhk.co/jezumasulej/dxjehhS/xexonezoxufesi.pdfIn PDF document text
    • https://cdn.sqhk.co/turanexode/fhhajgd/space_shooter_galaxy_shooting_cheats.pdfIn PDF document text
    • https://rukifutotusiz.weebly.com/uploads/1/3/4/6/134685592/54b76d1977395.pdfIn PDF document text
    • https://cdn.sqhk.co/wudawagirus/jgpY3gh/knives_out_no_rules_just_fight_uptodown.pdfIn PDF document text
    • https://cdn.sqhk.co/gulizate/gFgdrgg/heroes_battle_auto-_battle_rpg_guide.pdfIn PDF document text
    • https://cdn.sqhk.co/pamavunawi/egdhhRi/77794685857.pdfIn PDF document text
    • https://cdn.sqhk.co/numavagoko/gx2rcfF/58814471243.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosajesu.rf.gd/79885642455.pdfIn PDF document text
    • http://nutujetis.rf.gd/nuwugunulusifivuverid.pdfIn PDF document text
    • http://gedonisezif.epizy.com/the_americans_mcdougal_littell.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_off0000c95a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95A 5804 bytes
SHA-256: 8082a8e0ba334aefc3004a50bed2f059671fcd00c55e60eab187240fead08569
font_01_sfnt_off0000dd28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD28 9440 bytes
SHA-256: 47f8e71eaa34711011002d3fc4b4f00ba9d524bb8db1c79bd80cac47a2b91c41