Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2860b0de413188c…

MALICIOUS

PDF

107.3 KB Created: 2021-02-19 19:53:04 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-22
MD5: c7fdf24776d87edf67b07e0903c1e30d SHA-1: 50362a33d6a6dee906c294d875cd45745bfe3b4d SHA-256: c2860b0de413188c0e7d943f290f92be65c984c7cf35e319ab4c75aa62522fc9
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 0.9994

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://jacksth.ru/123?utm_term=how+to+play+naruto+trading+card+game PDF link annotation
    • https://wexejapu.weebly.com/uploads/1/3/1/3/131384175/sufokowipagatigomowo.pdfIn PDF document text
    • https://cdn.sqhk.co/wofunukasu/jaHhRje/42649480017.pdfIn PDF document text
    • https://muvepabeburok.weebly.com/uploads/1/3/1/4/131453329/kevoxigosegolatavewe.pdfIn PDF document text
    • http://merovew.xyz/samsung_washer_sud_error4gasb.pdfIn PDF document text
    • http://sqrab.top/batman_the_dark_knight_rises_apk_adrenoowp8m.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404990/normal_5fe99147b5812.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413368/normal_5ff57f3ee20cc.pdfIn PDF document text
    • https://cdn.sqhk.co/jawafurovif/htSZqji/20445070343.pdfIn PDF document text
    • http://alcexpress1.xyz/how_much_does_it_cost_to_replace_a_s9_plus_screenn403y.pdfIn PDF document text
    • https://cdn.sqhk.co/xevowuto/b4gebjg/fukerozez.pdfIn PDF document text
    • http://digitaloffice24.ru/7226936865681xce.pdfIn PDF document text
    • http://znalomstvavip.site/warframe_how_to_get_ignis_wraithmyzb7.pdfIn PDF document text
    • https://dufubixapitosig.weebly.com/uploads/1/3/4/5/134503348/biwuruvimaku-xivuxo-jopuxixode-sekovexobovemar.pdfIn PDF document text
    • https://cdn.sqhk.co/mupijuwo/jj0jdjj/nsw_police_scanner_app_android.pdfIn PDF document text
    • https://popibixa.weebly.com/uploads/1/3/4/7/134745137/a6af7a.pdfIn PDF document text
    • https://cdn.sqhk.co/vuwibagula/Zkeocgg/ncert_books_and_solutions_app_for_pc_offline.pdfIn PDF document text
    • https://cdn.sqhk.co/wulozonixuf/igfhjhk/star_wars_clone_wars_episodes_in_order.pdfIn PDF document text
    • http://kvyovk.xyz/kingdoms_and_lords_online_gamedpvas.pdfIn PDF document text
    • http://creamwalls.online/potinbdl41.pdfIn PDF document text
    • http://idealica-ufficialeitalia.website/68596173977adryr.pdfIn PDF document text
    • http://teplotronic.ru/96965424544d2usk.pdfIn PDF document text
    • http://probnik1313.tech/392704203978rpef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403808/normal_60234fe0aec3b.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4409614/normal_5fcc998eac106.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_off00016427.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16427 5372 bytes
SHA-256: daa68a85d72021f6b24824e2006c772ec609b840ae7afad82edff5ef32b01e0d
font_01_sfnt_off00017671.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17671 11492 bytes
SHA-256: 470c39315338417a9005f484bdcc8074e89ccc6256ebe71ddfaed8de749ff0d1

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