Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb98cdff4c6bc1a0…

MALICIOUS

PDF

69.9 KB Created: 2021-03-17 19:26:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 258b678d19ab787e0c74e83eb02289f3 SHA-1: 5b530b0420d1513361ef9a3526186ede225774fa SHA-256: fb98cdff4c6bc1a091cb819a4191567333ae4b297c3899916de7440819c6fad2
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9998

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://mezovuduw.ru/strik?utm_term=identidades+trigonometricas+reciprocas+y+pitagoricas PDF link annotation
    • http://particulieres-societegenerale.best/garmin_nuvi_1390t_map_updatebetpm.pdfIn PDF document text
    • http://rasprodavaika.ru/mean_median_mode_range_kid_definitions5vbg8.pdfIn PDF document text
    • http://vigastlens.xyz/34610264473udlrf.pdfIn PDF document text
    • https://zawasofolebu.weebly.com/uploads/1/3/4/9/134902788/ritozodefe_jevemomowit.pdfIn PDF document text
    • http://xebubux.sportsontheweb.net/gasitokeloxoro.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385635/normal_604dd8708315d.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4379618/normal_60019c5d4ded9.pdfIn PDF document text
    • https://luzulobopado.weebly.com/uploads/1/3/2/6/132681737/df42c327e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4373997/normal_6046279984037.pdfIn PDF document text
    • http://fsbsiod.com/business_day_calendar_2020_usaa89l1.pdfIn PDF document text
    • http://manuximaxemeje.scienceontheweb.net/kelusor.pdfIn PDF document text
    • http://sufulilutidake.mypressonline.com/the_last_wish_witcher_book_hardcover.pdfIn PDF document text
    • http://sibuvre.com/diary_of_a_wimpy_kid_the_deep_end_book_by_jeff_kinneyizw9n.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/432a53f0-abc7-4c8a-848f-e519713258f6/lisode.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3d7ef571-ba52-44ff-8515-db59551e990d/como_fazer_um_resumo_de_tcc.pdfIn PDF document text
    • https://90ff81fc-98d9-4e53-96a3-aaa5c1c2042e.filesusr.com/ugd/bb5aff_3281e332384d4cf5a16d61f60aae5f12.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/88ee0e86-fa79-4ed3-a75a-844df70e44b4/xixozinubolupudasudedegi.pdfIn PDF document text
    • https://044ec7df-721b-4788-b209-87474a3fcb06.filesusr.com/ugd/60ffa2_e4315d660127427ba9c584f458291a5a.pdf?index=trueIn PDF document text
    • https://uploads.strikinglycdn.com/files/710c2c46-f56b-4090-89e8-66dbc49d981a/maytag_3000_series_washer_drain_pump_location.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

Related samples 6

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d0ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD0AB 5400 bytes
SHA-256: 1d5e90cd1ac1d1f0479f32295c72813058f62706b69aa0a6546e64b02d04ad84
font_01_sfnt_off0000e2fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2FD 11316 bytes
SHA-256: a6da7d04a68f3bbed6317c5a64e9f503cc4dcea67185c1c32599c1628bf589de

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