Malicious PDF — malware analysis report

Static analysis result for SHA-256 311ad4bf1f2e8de0…

MALICIOUS

PDF

72.8 KB Created: 2021-02-17 21:03:32 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-25
MD5: e9b9870e0487350974b714f8a82c3b4d SHA-1: 5e9e783862e21c812ef96a28982655aea1f3698b SHA-256: 311ad4bf1f2e8de0cd14dc7738a0ff7a0c1f9c2dc3e243e0787001ce167da9fe
126 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • 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 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/123?utm_term=sigmund+freud+libro+interpretacion+de+los+sue%25C3%25B1os+pdf PDF link annotation
    • https://cdn.sqhk.co/fedugaxoloz/XhgKieh/stickman_master_archer_legends_mod_apk_an1.pdfIn PDF document text
    • https://cdn.sqhk.co/zovaratigu/ugcDjaf/nuzotulepunojo.pdfIn PDF document text
    • https://cdn.sqhk.co/fegadosijete/awYidii/28593015078.pdfIn PDF document text
    • http://takovod.66ghz.com/how_to_make_percentages_in_google_sheets.pdfIn PDF document text
    • https://cdn.sqhk.co/wubukuxivupe/jnIhahi/17778773146.pdfIn PDF document text
    • https://cdn.sqhk.co/rimudatige/hcnbpgf/47223781860.pdfIn PDF document text
    • http://italy-small.space/ludasixeguropepuvurezg4lu1.pdfIn PDF document text
    • https://cdn.sqhk.co/joxomawezu/tieNdja/100_games_to_play_at_home.pdfIn PDF document text
    • https://cdn.sqhk.co/niwexifa/jiZhajT/tower_run_game_how_to_play.pdfIn PDF document text
    • https://cdn.sqhk.co/midipijikami/hdWXjjM/dugomuposataxalirafate.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xovogig.epizy.com/95112356139.pdfIn PDF document text
    • http://kakoxoduruze.epizy.com/bufegesafafulejage.pdfIn PDF document text
    • http://suluzisose.rf.gd/avon_catalogue_september_2018.pdfIn PDF document text
    • http://notumaxesi.epizy.com/labonazazolo.pdfIn PDF document text
    • http://pavunununege.epizy.com/guided_tours_in_rome_tripadvisor.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_off0000d98a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD98A 5932 bytes
SHA-256: f8338543288d2914d1fa6973196c56ccda9a0371e16d324e3b0d3003baf99d60
font_01_sfnt_off0000ed5f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xED5F 11676 bytes
SHA-256: d0a4fba51034d3d55c830d782d552c979a7c60d053e4ef14083a70f416631904