Malicious PDF — malware analysis report

Static analysis result for SHA-256 25cbf0a24a4524a0…

MALICIOUS

PDF

78.1 KB Created: 2021-03-16 04:40:27 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 82bbeaeec1698670d9935d7a4825535a SHA-1: d8aa727980839da397f67ac45c8436470eba83b6 SHA-256: 25cbf0a24a4524a08fc6855caa1c64514dce238a022a8836d244938d9e203893
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 0.9993

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://fokemale.ru/strik?utm_term=chinese+150cc+side+by+side+shotgun PDF link annotation
    • http://nafepuzemobir.sportsontheweb.net/nasebidigaduxivaxa.pdfIn PDF document text
    • http://003-center.ru/49372522784cg4nc.pdfIn PDF document text
    • https://cdn.sqhk.co/riwaxagi/L1jfchh/free_template_for_baby_shower_invitation.pdfIn PDF document text
    • http://pajuwepubawip.sportsontheweb.net/why_was_a_series_of_unfortunate_events_movie_cancelled.pdfIn PDF document text
    • https://cdn.sqhk.co/gidetixi/ilUg4zm/earn_to_die_2_exodus_game.pdfIn PDF document text
    • http://gazizelasama.getenjoyment.net/13_powerful_quotes_about_inner_strength.pdfIn PDF document text
    • http://felaxelibapef.iblogger.org/rinotapawusex.pdfIn PDF document text
    • https://cdn.sqhk.co/puvijupem/gaegjhh/octopus_vs_squid_differences.pdfIn PDF document text
    • http://lowusonuraku.mygamesonline.org/the_balkan_wars.pdfIn PDF document text
    • https://cdn.sqhk.co/karapazepot/oiekOhh/learn_c_in_21_days.pdfIn PDF document text
    • http://lupelisizi.medianewsonline.com/97795824576.pdfIn PDF document text
    • http://site-shop.xyz/16523639673oca1n.pdfIn PDF document text
    • http://femuxeririta.mygamesonline.org/dower.pdfIn PDF document text
    • https://cdn.sqhk.co/tozegatopaxu/hhi1ii6/greatsword_dark_souls_3_best_infusion.pdfIn PDF document text
    • http://sexutepunoronuw.iblogger.org/ikea_malm_bedside_table_manual.pdfIn PDF document text
    • http://poverkavoda.website/rascal_pioneer_mobility_scooter_reviewszk5zw.pdfIn PDF document text
    • http://gemubanabugawa.mypressonline.com/vusorugivonuzamelimigaja.pdfIn PDF document text
    • http://kisizifavo.getenjoyment.net/4560423675.pdfIn PDF document text
    • http://gbo.guru/7181605832335kw6.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://878ee1be-828d-48b9-a24a-84283cf66a1c.filesusr.com/ugd/86936c_af916c9173b241a79f4fd51347e35f2c.pdf?index=trueIn PDF document text
    • https://02664c88-84e5-42fa-aae3-682d3a0d4328.filesusr.com/ugd/39d081_fd2b17bcfedf42e48dda30ccc503509a.pdf?index=trueIn PDF document text
    • http://vovojoj.atwebpages.com/renez.pdfIn PDF document text
    • https://f815f12b-539f-4060-8ed9-abd2caada31b.filesusr.com/ugd/ceb2e8_fb22befef3c4424b8e7e9d83f8f982c2.pdf?index=trueIn 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_off0000e67f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE67F 5328 bytes
SHA-256: 572c90522971b9390e6a85e1bfcb33847ac0a4f9541ee3da1e22825ae01c5612
font_01_sfnt_off0000f8ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF8AD 15872 bytes
SHA-256: d1dfd31de1a13f170ea113bd97cea528ba1d002ea8cbb0f4abdeca8651f361e7

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