Malicious PDF — malware analysis report

Static analysis result for SHA-256 663022bfa7c033fa…

MALICIOUS

PDF

82.3 KB Created: 2021-03-29 10:23:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 64cc3cbb5bf6ba3dd08a599ea467e5e9 SHA-1: 41c9461f3b7a340f85dd35c254c1da499a1f8234 SHA-256: 663022bfa7c033fa107808be115f64234d785272cbe51c883daaf4f49fc18ae8
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://lozipotod.ru/award?keyword=data+analytics+course+syllabus+pdf PDF link annotation
    • http://salonapp.xyz/estudios_biblicos_para_jovenes_cristianosu69t1.pdfIn PDF document text
    • http://winatesef.sportsontheweb.net/68863969486.pdfIn PDF document text
    • http://azorocheat6.xyz/non_inventory_item_report_in_quickbooksa2dt7.pdfIn PDF document text
    • http://brosbass.com/3935724645126ywb.pdfIn PDF document text
    • http://copyrighthelpcentral.com/the_cloud_of_unknowing_chapter_summaryxy399.pdfIn PDF document text
    • http://ramifapufebi.scienceontheweb.net/cancionero_popular_mexicano_gratis.pdfIn PDF document text
    • https://cdn.sqhk.co/muvasesuru/gdMgglK/55259721712.pdfIn PDF document text
    • https://cdn.sqhk.co/lewikokezina/ghhfFhc/coalition_multiplayer_fps_mod_apk.pdfIn PDF document text
    • http://alkostore.xyz/autodesk_bim_360_glue_desktop_appwoms6.pdfIn PDF document text
    • https://cdn.sqhk.co/xesenames/Gidvgia/5467188682.pdfIn PDF document text
    • http://weraka.online/zinorapunabelavusodajajjf2fd.pdfIn PDF document text
    • https://cdn.sqhk.co/mixaluwekitu/p235ihd/68954902053.pdfIn PDF document text
    • http://tehnotop.site/380540673413tj9p.pdfIn PDF document text
    • http://mirror-x.org/rebovezunelidulawum6xebc.pdfIn PDF document text
    • http://importants.space/cost_to_repair_old_singer_sewing_machinex9f3d.pdfIn PDF document text
    • http://reduslim-italiaoficial.site/probabilidad_y_estadistica_descriptiva2uuhr.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://c6f55193-7475-4343-97dd-33cb3b141b6a.filesusr.com/ugd/808d8c_cc9319bb23a244a3b07f851e72114455.pdf?index=trueIn PDF document text
    • https://bff5fdab-9fd0-4670-908b-a1308bb5a9cb.filesusr.com/ugd/227d0f_e58fd6168845408ea9aef748205b7f37.pdf?index=trueIn PDF document text
    • http://wotidupodugi.myartsonline.com/63404392883.pdfIn PDF document text
    • https://203aa715-7352-46b1-b16b-5d0aeeaa27a2.filesusr.com/ugd/0582e0_ba4164b33e0f469ba992338e07e4fa21.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/divelikubapiwaj/revebofudurotetifepomexok.pdfIn PDF document text
    • https://s3.amazonaws.com/vabedafozo/fodex.pdfIn PDF document text
    • https://s3.amazonaws.com/litunux/cloud_9_movie_filming_location.pdfIn PDF document text
    • https://fad58b31-c538-4d3f-828d-7998eec853b9.filesusr.com/ugd/7e6083_5857ba8b44c5401281ba0c133f6383b3.pdf?index=trueIn PDF document text
    • https://46b09160-81f9-4cb3-9cca-f7b5b0c0229e.filesusr.com/ugd/179cc6_d2810ca20aa848369bcd0ef739d4c54d.pdf?index=trueIn 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_off00010344.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10344 5392 bytes
SHA-256: 6aa7a58c1f1a5e48744f2be992653ec2abb76130c0b4e1111c6f94c2f717f1b2
font_01_sfnt_off000115ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115AD 10620 bytes
SHA-256: 7bef0e223e79e67539edb641d92cb350bdc5d58e13aadbf6a9f8dd038c715a4d

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