Malicious PDF — malware analysis report

Static analysis result for SHA-256 20bdf719bbe12aeb…

MALICIOUS

PDF

76.3 KB Created: 2021-03-11 17:32:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 9e5f670586bce85a2afbf955a55ef9d2 SHA-1: dc8c0b3e1f4ca7c6466244e8fe33b3e83339b0f9 SHA-256: 20bdf719bbe12aeb9f6b63a776e232825777350c651377b96db3c36db24662a1
184 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

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 0.9835

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 contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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
  • 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://crophysi.ru/award?keyword=irrigation+engineering+and+hydraulic+structures+pdf+download PDF link annotation
    • https://cdn.sqhk.co/mumeriretepi/gQxjeje/dino_run_2_another_unblocked_game_site.pdfIn PDF document text
    • https://cdn.sqhk.co/pofadugilip/31jgAjb/mouse_running_wheel.pdfIn PDF document text
    • http://wisadovebedej.iblogger.org/the_magicians_season_5_episode_12_imdb.pdfIn PDF document text
    • https://cdn.sqhk.co/xerejijasoma/hhhy339/power_bass_amp_review.pdfIn PDF document text
    • http://wonozudobitisog.scienceontheweb.net/when_is_the_new_twilight_book_midnight_sun_coming_out.pdfIn PDF document text
    • https://cdn.sqhk.co/fanabezom/jjT1Hjj/32148721401.pdfIn PDF document text
    • http://tuxukimuxegan.22web.org/malojevojumajenani.pdfIn PDF document text
    • https://cdn.sqhk.co/vovusupa/0jbXAhg/international_business_news_articles.pdfIn PDF document text
    • http://vubureteka.22web.org/what_is_knowledge_integration_framework.pdfIn PDF document text
    • http://vutisonoj.sportsontheweb.net/whirlpool_quiet_partner_3.pdfIn PDF document text
    • http://pimifawimonidij.mywebcommunity.org/magnus_chase_and_the_ship_of_the_dead_audiobook_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://737bf953-b780-43bc-8af0-312ed5328a40.filesusr.com/ugd/017c44_475cf16509c943b3aec4b698599f51e9.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/gasodamuza/31803612993.pdfIn PDF document text
    • https://19f621d4-ab03-49b5-bf1d-c78de40104d4.filesusr.com/ugd/bc84a3_7526baeea8e74d3da65d8c2ea420e911.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/mudurixo/sedozanoboja.pdfIn PDF document text
    • https://5d94d51b-2702-4b64-8df3-eadd022f3edc.filesusr.com/ugd/2ddd39_0b792c1b324744b0adfae9e18e9678a3.pdf?index=trueIn PDF document text
    • http://zezajezo.epizy.com/advanced_life_support_manual.pdfIn PDF document text
    • https://s3.amazonaws.com/pajeriramal/kickboxer_full_movie_tamil_dubbed.pdfIn PDF document text
    • https://s3.amazonaws.com/zedilegol/template_ecommerce_bootstrap_premium.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fc6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC6E 5548 bytes
SHA-256: b9c9634f610df4b7254182f2deff8009e5cca8c734ac3ce4b425b45be3d93bb9
font_01_sfnt_off00010f64.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F64 10184 bytes
SHA-256: 3c9c1bfef5b61e197a56b9abd4b6c39f01f8b27f2f77c54c0819d4d89afedb5f

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