Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fbf8fadde99cb79…

MALICIOUS

PDF

79.1 KB Created: 2021-04-01 23:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8304daf9ba8a08e890b79f890a89d664 SHA-1: b38cf419eeb80e9132d57f2490ffe89f1dcc6bf3 SHA-256: 2fbf8fadde99cb79fe1e61963e445f875dcc4431101f93fa6ab04dc3288ea5cb
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 0.9996

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://ponafet.ru/aws?utm_term=what+qualities+do+you+need+to+be+a+model PDF link annotation
    • https://cdn.sqhk.co/podogule/dJN4ieL/how_to_make_anything.pdfIn PDF document text
    • http://vivoxasoro.22web.org/bakax.pdfIn PDF document text
    • https://cdn.sqhk.co/nurofiwele/jft2jf9/gaxexu.pdfIn PDF document text
    • https://cdn.sqhk.co/sajatanugeg/j6jdhiP/temple_run_2_online_poki.pdfIn PDF document text
    • http://vienvozvrat.site/linkmenu_ezerai_2_etapasglzmt.pdfIn PDF document text
    • http://dorugatutaxovi.scienceontheweb.net/water_supply_and_sewerage_book.pdfIn PDF document text
    • http://gezetola.scienceontheweb.net/rofofefenugotuboxuvibexe.pdfIn PDF document text
    • http://counterman.ru/sat_math_sectionw2sjb.pdfIn PDF document text
    • https://cdn.sqhk.co/libavesonon/KjhQjgt/lawag.pdfIn PDF document text
    • https://cdn.sqhk.co/nolagutotato/ifOha9r/jegakapiniwivobap.pdfIn PDF document text
    • http://kiruvoxexuk.iblogger.org/mukenivafejafemisanu.pdfIn PDF document text
    • http://italysummer.space/36403532486kl2v0.pdfIn PDF document text
    • https://cdn.sqhk.co/fexilejedit/iitgEhc/95285754935.pdfIn PDF document text
    • https://cdn.sqhk.co/foradimotiri/bUjfyJd/dazivanenokawoloropok.pdfIn PDF document text
    • https://cdn.sqhk.co/wezufunin/zjihcIF/91564271573.pdfIn PDF document text
    • https://cdn.sqhk.co/regisanozoxo/wibgfl3/dobidedamuwoderenis.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://tizovosavudufi.rf.gd/sabupemisonokiso.pdfIn PDF document text
    • http://jelomasulavi.atwebpages.com/63071251280.pdfIn PDF document text
    • http://laletowizoz.epizy.com/blue_jackets_manual_18th_edition.pdfIn PDF document text
    • http://zikinevubebera.epizy.com/40842636348.pdfIn PDF document text
    • http://fiwofitobuz.rf.gd/l2r_your_guide.pdfIn PDF document text
    • http://gumusijejokezit.epizy.com/lunch_and_learn_invitation_email_template.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_off0000f970.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF970 5348 bytes
SHA-256: 30e3714cda2e266e176da16525cec02e8387100331cf54217110593352936fcc
font_01_sfnt_off00010b87.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B87 10228 bytes
SHA-256: e1361f88f9dc09f180cc13e97f7ab5926a44ecec9a4ed6b7bf089bf204f968d9

Open this report in the interactive analyzer, or submit your own file for analysis.