Malicious PDF — malware analysis report

Static analysis result for SHA-256 c0a5675123808e4c…

MALICIOUS

PDF

77.9 KB Created: 2021-02-23 06:25:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 9623d2337feaa59a660d5f57f37ae652 SHA-1: e65afdb55b91c01297c4ec3440eedb80fcf8a2cc SHA-256: c0a5675123808e4c92848af6cba7545fe4ccf81ffcaccdd5826a727d5b85cf2d
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains numerous embedded URLs, many pointing to disposable domains, suggesting a link farm or phishing lure. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' specifically flags this behavior, indicating the PDF is designed to redirect users to multiple external sites.

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://maypoin.ru/123?utm_term=ritetemp+6022+manual PDF link annotation
    • https://cdn.sqhk.co/pakelabete/aWSGZjg/lsu_football_championship_game_2020.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369793/normal_602d318321219.pdfIn PDF document text
    • http://fiwugixupodo.iblogger.org/tenibomogesobuk.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4408475/normal_60097658a5375.pdfIn PDF document text
    • http://50offshop.pro/how_to_reset_a_vtech_cordless_phoneaww67.pdfIn PDF document text
    • http://dazomasuw.22web.org/indigo_airlines_bag_information.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4427538/normal_600c4a248ddf0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4477921/normal_5fd7fa1acf1a8.pdfIn PDF document text
    • http://zejufixapoferu.iblogger.org/63473576188.pdfIn PDF document text
    • http://losqutoq.online/what_to_do_to_get_real_estate_license_floridaogsp6.pdfIn PDF document text
    • https://cdn.sqhk.co/tutabalero/doigw8M/pubugilikajovedediva.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://gometupibi.rf.gd/high_thread_count_sheets_make_me_sweat.pdfIn PDF document text
    • http://deketinak.rf.gd/adobe_after_effects_project_files_free.pdfIn PDF document text
    • http://xokeraje.rf.gd/avg_tuneup_crack.pdfIn PDF document text
    • http://welolazudadiv.epizy.com/koselapesusuwej.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_off0000f5fe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF5FE 5124 bytes
SHA-256: 63f0ed026843545092929395afd099ee45b4afb2f3b39b50ef85e535e9c061fc
font_01_sfnt_off00010760.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10760 10536 bytes
SHA-256: 4edd4a39e23f35016750aea9881886509d955a6288253c31f7d37f0def5448cd

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