Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1b3e463eece3551…

MALICIOUS

PDF

68.4 KB Created: 2021-03-30 19:44:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 3469f991d8635073a824845a9a58c7e5 SHA-1: a95917f90aafe14b26e267625d1fee5faefa63c0 SHA-256: d1b3e463eece35511ca3deb8c94fdfcbdc87ad0c8081b10afedbb47042d68eef
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://vilenefex.ru/123?utm_term=cosco+shipping+holdings+annual+report+2017 PDF link annotation
    • https://goxesepejapumew.weebly.com/uploads/1/3/4/6/134609979/497798c7a.pdfIn PDF document text
    • http://confirmyourverifiedbadge.com/why_spring_boot_is_betterpussi.pdfIn PDF document text
    • https://cdn.sqhk.co/fusevesapime/0hiXhcT/35546762449.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420915/normal_5ff8c6ce8cc02.pdfIn PDF document text
    • http://airned.ru/free_jet_ski_racing_games5lgsn.pdfIn PDF document text
    • http://zerkalo-fugicar.website/fibixenotisixapenevuemekm.pdfIn PDF document text
    • https://koxidofajutu.weebly.com/uploads/1/3/5/9/135971573/3904381.pdfIn PDF document text
    • https://cdn.sqhk.co/dogutadova/C0pgghh/91749734041.pdfIn PDF document text
    • http://mavigawika.scienceontheweb.net/how_to_program_my_universal_remote_to_my_dvd_player.pdfIn PDF document text
    • http://instapresent.site/10750351509zznbh.pdfIn PDF document text
    • http://redirunna.xyz/how_to_clean_flame_rod_on_rheem_tankless_water_heaterwezed.pdfIn PDF document text
    • http://allostar.buzz/today_show_hosts_pasteib63.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485942/normal_5fcebecb3fe00.pdfIn PDF document text
    • http://lexamopelezun.mywebcommunity.org/french_course_for_beginners.pdfIn PDF document text
    • http://newberginvestmentproperty.com/american_literature_short_stories4upwr.pdfIn PDF document text
    • https://zutosexumapa.weebly.com/uploads/1/3/1/6/131606298/rebupob.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460682/normal_605165711282f.pdfIn PDF document text
    • https://bikezurikol.weebly.com/uploads/1/3/4/6/134612173/7898099.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://pawepeg.atwebpages.com/auditing_and_assurance_services_16th_edition_download.pdfIn PDF document text
    • http://batapijas.myartsonline.com/beden_dili_kitab.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_off0000cc46.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCC46 5648 bytes
SHA-256: b1098e9b774c70eed858e3b78b045afd4b13eecb03fc2bba360b885c3f9d5f39
font_01_sfnt_off0000df7a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDF7A 10676 bytes
SHA-256: 963edb4feb308d4d26112062e841db0b31b62d49a991109fc0077a6b45ada9a2

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