Malicious PDF — malware analysis report

Static analysis result for SHA-256 a128d0f6013d8dee…

MALICIOUS

PDF

79.9 KB Created: 2021-02-28 04:16:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: fa8412768bc6ad08c463faf0d36c6c7b SHA-1: 089fc6c713f1d1f6bda4740693daa9f398aaca22 SHA-256: a128d0f6013d8dee027bf45ad1a4101b1d95bc4ea89d605c2343e3f82da76d91
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://botokaw.ru/strik?utm_term=safety+1st+thermometer+change+to+rectal PDF link annotation
    • https://cdn.sqhk.co/savageven/gA894o3/march_2021_calendar_printable_free.pdfIn PDF document text
    • http://smm-target.ru/you_are_not_so_smartjm2jz.pdfIn PDF document text
    • http://help-feedback-amzn6.xyz/flight_sim_2018_apk_mod36o3i.pdfIn PDF document text
    • https://lewagezu.weebly.com/uploads/1/3/4/3/134369469/tesozi.pdfIn PDF document text
    • https://cdn.sqhk.co/jumivosokigo/cgh7vNi/kulogojoxowuwokubejumoj.pdfIn PDF document text
    • https://nitomono.weebly.com/uploads/1/3/1/4/131454496/fepuvikaj.pdfIn PDF document text
    • https://cdn.sqhk.co/tipekafomube/jeDjay5/gevulapizat.pdfIn PDF document text
    • https://cdn.sqhk.co/bugininaxi/jidZrVi/3963836664.pdfIn PDF document text
    • https://cdn.sqhk.co/febapaji/hlvjihf/start_em_sit_em_si_week_6.pdfIn PDF document text
    • https://cdn.sqhk.co/nigigeje/ricGgiI/pixel_starships_qtarian_ship_layout_level_6.pdfIn PDF document text
    • https://cdn.sqhk.co/kosifodalab/d4pR6ii/free_country_music_radio_stations.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402951/normal_6017677302c77.pdfIn PDF document text
    • https://fegajasun.weebly.com/uploads/1/3/4/5/134502742/3802777.pdfIn PDF document text
    • https://cdn.sqhk.co/gujuvizaja/bhfRgc8/sing_karaoke_app.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/gezejoputiwinu/adobe_acrobat_professional_free_softonic.pdfIn PDF document text
    • https://s3.amazonaws.com/magapeguwabe/xemubejedereziligupesomu.pdfIn PDF document text
    • https://s3.amazonaws.com/fedufiporara/45076741874.pdfIn PDF document text
    • https://s3.amazonaws.com/lezopobigeza/62827472919.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_off0000fc0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC0E 5552 bytes
SHA-256: 2fa6dd5e6db9f73102099f8f05e5cf5194ac3641e91952f0f2a12e4ed21392ca
font_01_sfnt_off00010ede.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EDE 10496 bytes
SHA-256: 90217ed01dd4cfb55818911b7ec7227afb17eba3611453761a1cf660edb25e43

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