Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f2da53b788e3262…

MALICIOUS

PDF

59.8 KB Created: 2021-06-06 17:06:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-24
MD5: f5f12b31def9648e8c3f384fe67c90ec SHA-1: 9b5bf4eab6fd73be3031a6ccb9f9a091fc296fb3 SHA-256: 7f2da53b788e3262127ae1cacb2141f72d029bc6652b9ff92c93f732715a91b7
124 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution T1059.007 JavaScript

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 0.7633

Heuristics 4

  • 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
  • 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://cructi.ru/pbw?utm_term=exponent+rules+word+problems+worksheet PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4377938/normal_5fff64d2da16b.pdfIn PDF document text
    • https://static.s123-cdn-static-d.com/uploads/4470402/normal_60b6de92447b0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4369908/normal_5fcad74238742.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4366344/normal_5fd03fb0498d3.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://dipoziw.pbworks.com/f/37254378031.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/76ff7360-9d82-4f1d-98d0-7a884db941ce/do_i_need_to_add_water_to_my_electric_smoker.pdfIn PDF document text
    • http://jeselivid.pbworks.com/w/file/fetch/144573303/pte_academic_book_free_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/57695eb9-2340-414b-b850-841e4ec1124b/air_force_academy_football_roster_2018.pdfIn PDF document text
    • http://biwonuv.pbworks.com/w/file/fetch/144596412/zikugutoxowixunagajigumuw.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3fcd6517-70fb-4dd6-be41-419ee661ee3f/faboj.pdfIn PDF document text
    • http://kafunujazuwo.pbworks.com/f/how_long_can_you_leave_splat_bleach_on.pdfIn PDF document text
    • http://padimagofo.pbworks.com/f/20060925548.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/how_to_put_two_quotes_into_one_sentence.pdfIn PDF document text
    • http://xalomuzavege.pbworks.com/f/57624629735.pdfIn PDF document text
    • http://zizovitunex.pbworks.com/f/15776313274.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/13ff0253-3782-44db-a122-a58975dc3485/campark_trail_camera-wifi_20mp_1296p.pdfIn PDF document text
    • http://nijominem.pbworks.com/w/file/fetch/144709839/7786061757.pdfIn PDF document text
    • http://siwuromo.pbworks.com/w/file/fetch/144425118/krispy_kreme_donut_holes_nutrition_information.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c58f463a-c212-442d-933c-5418ae45cdc6/treasure_island_hardcover_book.pdfIn PDF document text
    • http://vikiruji.pbworks.com/f/79607882087.pdfIn PDF document text
    • http://jilawuxifi.pbworks.com/w/file/fetch/144659262/madowodiwikodize.pdfIn PDF document text
    • http://wabiwepakeg.pbworks.com/f/tanu_weds_manu_returns_full_movie_hd_720p_free_download.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 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD661 5308 bytes
SHA-256: 1abb527509cabb4126b8775aca1a44ba34cb330d84f032c33a43ca2196ff6728

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