Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e1f6e5d403097d2…

MALICIOUS

PDF

77.8 KB Created: 2021-01-29 15:10:51 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: 348c57bf4a459005516febcb4de12a7b SHA-1: 2b934b2e8ca387a972276249b756330ee27bf46f SHA-256: 5e1f6e5d403097d270b3f9af860680ab7f73e268d84bb345cd6919e055713b5e
194 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 7

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=mtg+arena+tablet PDF link annotation
    • https://cdn.sqhk.co/verexoleki/6SFUXhd/wallpaper_for_samsung_s10_plus.pdfIn PDF document text
    • https://cdn.sqhk.co/muvuxaji/hifjeDs/lirejadiwuvoxo.pdfIn PDF document text
    • https://cdn.sqhk.co/silakozafi/heRUuhe/movie_collection_app_iphone.pdfIn PDF document text
    • http://bigswinner.space/ravens_vs_steelers_game_timen0qmn.pdfIn PDF document text
    • http://lnstagramverifiedbadgeshelpcenters.net/samisuxobuxiki102e.pdfIn PDF document text
    • https://cdn.sqhk.co/zewapoxi/VDXihrz/best_country_ringtones_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/tivinarafuvu/pjiOjgc/tetris_99_how_to_attack_other_players.pdfIn PDF document text
    • http://mnclassis.org/32455349578wsxum.pdfIn PDF document text
    • http://begdas.space/76717675231pyuwr.pdfIn PDF document text
    • https://dumisoxi.weebly.com/uploads/1/3/4/6/134625223/zapuvujasisuw-lolevoze.pdfIn PDF document text
    • https://dunexekexafu.weebly.com/uploads/1/3/4/6/134622254/e48cfc2cbe79bc3.pdfIn PDF document text
    • http://nncucuucuc.space/netizigujuwoenqqf.pdfIn PDF document text
    • https://cdn.sqhk.co/jawuraxexije/9jhiePd/killer_bean_unleashed_mod_apk_uptodown.pdfIn PDF document text
    • http://jadebey-x.com/dosokosogosevezubirekonqbbkz.pdfIn PDF document text
    • https://cdn.sqhk.co/bamikalagov/hFvjjgf/ruvuxigajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/nelizenejakarug/lokexufujiraxoj.pdfIn PDF document text
    • https://s3.amazonaws.com/nijosinizo/jesifetonenalili.pdfIn PDF document text
    • https://s3.amazonaws.com/zuwosil/dicionario_aulete_gratis.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_off0000f603.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF603 4820 bytes
SHA-256: 632441795020042e9eb4b12f6ca4f6566f81c267fe54d224eee3d068c764877b
font_01_sfnt_off00010687.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10687 10492 bytes
SHA-256: 07923250f77899ef63e14db0048d343bf5e773a5fc9f14901506568f299ebd29

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