Malicious PDF — malware analysis report

Static analysis result for SHA-256 9fbbb91e87c35e26…

MALICIOUS

PDF

71.6 KB Created: 2021-02-24 16:10:07 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-10
MD5: f45914ea25042ddeda193ba9098d63ec SHA-1: 083dedc04d903ef629fcb0213b9de77a22777620 SHA-256: 9fbbb91e87c35e262efb963697ef3cd5fd26070fdf3b1b0011d2851f0c2121e4
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 6

  • 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 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://maypoin.ru/123?utm_term=how+accurate+are+rapid+influenza+diagnostic+tests PDF link annotation
    • https://nazalufu.weebly.com/uploads/1/3/1/4/131409274/3419734.pdfIn PDF document text
    • https://kaxesudinebeg.weebly.com/uploads/1/3/1/3/131379803/javakebilitadew.pdfIn PDF document text
    • https://cdn.sqhk.co/fezifenax/dV16KSI/huntsman_winter_war_movie_review.pdfIn PDF document text
    • https://nupepapeziwib.weebly.com/uploads/1/3/5/3/135319604/sumokazala_bubeturekazotul_madilojuxome.pdfIn PDF document text
    • https://cdn.sqhk.co/penuvipaw/jaj8XgD/textra_sms_pro_4._22_apk.pdfIn PDF document text
    • https://gupolakeg.weebly.com/uploads/1/3/1/8/131871569/runekisijo_lederuvadezijuv_jizuxal_lowebaresiniz.pdfIn PDF document text
    • http://afracheat3.xyz/olmaz_olsun_cebimde_milyonlar9to41.pdfIn PDF document text
    • https://cdn.sqhk.co/fadejiweruw/aHhbiM3/harvest_right_freeze_dryer_pump_maintenance.pdfIn PDF document text
    • https://cdn.sqhk.co/jabosuve/HBmhjii/zarudopafufo.pdfIn PDF document text
    • https://gorofegi.weebly.com/uploads/1/3/4/4/134462705/kopipajubetadix.pdfIn PDF document text
    • https://cdn.sqhk.co/zenetofuma/1mhjYgs/hide_photo_video_app_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/pozusonitid/qDPgfji/how_do_you_spell_street_credit.pdfIn PDF document text
    • https://vamalogobiw.weebly.com/uploads/1/3/4/6/134696595/fojabasor.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/fotojipifuzitul/8144534859.pdfIn PDF document text
    • https://s3.amazonaws.com/remuv/how_do_you_update_kindle_fire.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_off0000db4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDB4A 5424 bytes
SHA-256: 8ed991e59cac2d5a8a71af5e3be9e5b117cf3f5d3a9cc1b367c960b100d2ae9a
font_01_sfnt_off0000edeb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEB 10344 bytes
SHA-256: 99477a59385c5a0a593bb04183d88bddcb2e844155eebbaf2bf1db372096d65b