Malicious PDF — malware analysis report

Static analysis result for SHA-256 d41a84ff2b1f3ef6…

MALICIOUS

PDF

69.1 KB Created: 2021-02-06 20:40:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: c825c0282e261a1753e7c4a33449a053 SHA-1: 077771333ababcc9e5d3721d05d85741bf42f74c SHA-256: d41a84ff2b1f3ef6d551160144caab042f781c7b529a22a097ed65a566077b9e
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://jacksth.ru/wb?keyword=simple%20and%20complete%20predicate%20worksheets%20with%20answers PDF link annotation
    • https://gigazubexu.weebly.com/uploads/1/3/4/6/134613152/45ea942ba6.pdfIn PDF document text
    • http://marafonsport.site/best_police_siren_app_iosgei81.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4491164/normal_5fffd0e22bac5.pdfIn PDF document text
    • https://cdn.sqhk.co/jutusaxibu/jhMifhh/celebrity_voice_changer_app_price.pdfIn PDF document text
    • https://denutuzuno.weebly.com/uploads/1/3/4/7/134706868/9915319.pdfIn PDF document text
    • https://cdn.sqhk.co/robimovule/ChjjeWt/san_andres_island_costa_rica.pdfIn PDF document text
    • https://rakerekibakefe.weebly.com/uploads/1/3/4/5/134596095/f7eb158ffd99b2.pdfIn PDF document text
    • https://jekosupoma.weebly.com/uploads/1/3/1/6/131637113/2077008.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4483345/normal_6016fa447dd7a.pdfIn PDF document text
    • https://cdn.sqhk.co/papovezegep/mxPXhjK/monster_breaker_hero_mod.pdfIn PDF document text
    • https://wolagevujizerul.weebly.com/uploads/1/3/5/3/135316080/wovapejozev.pdfIn PDF document text
    • http://firstdoctor.xyz/74176609927a6q6s.pdfIn PDF document text
    • https://vulemozebo.weebly.com/uploads/1/3/4/6/134693025/9295537.pdfIn PDF document text
    • https://givurili.weebly.com/uploads/1/3/4/6/134605008/xarikelijumefasese.pdfIn PDF document text
    • https://wemezixogasowed.weebly.com/uploads/1/3/1/6/131637562/zisinix.pdfIn PDF document text
    • https://worojipe.weebly.com/uploads/1/3/1/3/131382243/bajufuta_noxibedakufo_mezumomarexo_sabiri.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452608/normal_60122197a6723.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_60145855deb17.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000d00f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD00F 5572 bytes
SHA-256: e29f44e9cdbf0863e5a732f64b7d7a45fb496f68cc47a00df997e436b5de07ec
font_01_sfnt_off0000e2e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2E2 10636 bytes
SHA-256: e3b9d718608aad26e850c4cdc557d2823189445b3e7eded47ac76ff6dfb536c0

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