Malicious PDF — malware analysis report

Static analysis result for SHA-256 b539c0a0ba926671…

MALICIOUS

PDF

74.7 KB Created: 2021-03-28 11:49:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 224c06c077e8c729ae48c295e3ff45e4 SHA-1: af3edb6f88f3ac081988ea7f0bf4abdddb04502c SHA-256: b539c0a0ba9266714041ff4e8aea2c3a14cbfaae93067a0221ee3c52f9cf10e3
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 0.8022

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://mezovuduw.ru/award?keyword=escala+cromatica+clarinete+si+bemol+pdf PDF link annotation
    • http://jabewes.medianewsonline.com/belajar_coding_untuk_pemula.pdfIn PDF document text
    • http://dotekebenutedex.scienceontheweb.net/jifofasabama.pdfIn PDF document text
    • http://bukudix.getenjoyment.net/12636267802.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373016/normal_6007650105885.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462096/normal_5fd1045de861b.pdfIn PDF document text
    • http://tokudujadi.medianewsonline.com/binuvevubesos.pdfIn PDF document text
    • http://kosiwixiwumizu.iblogger.org/star_wars_battlefront_3_file.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4473388/normal_6053bcf81bf02.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368772/normal_602b2ba18e064.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389823/normal_60171beac55a9.pdfIn PDF document text
    • http://pifovabu.getenjoyment.net/37758511775.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4455681/normal_6050334671c82.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/3e707c1e-d792-40a9-868a-226f4c16a722/tutorialspoint_ms_access_2007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9f1088dc-7d1a-4c28-b08e-b143538d8927/samsung_8000_series_refresh_rate.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/978ef7b1-d479-4b70-94b1-a0b7fef195a0/what_the_bible_says_about_cheating_in_marriage.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/90e4058c-baa1-468a-be66-f60d7bf5c233/vadibixapudowimowox.pdfIn PDF document text
    • http://pevivudawof.epizy.com/28831207138.pdfIn PDF document text
    • http://bawawajabatura.epizy.com/ley_de_ohm_y_potencia_electrica_ejercicios_resueltos.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60b3824f-68fe-4572-9c26-7f46ec7f55e5/how_to_cook_harvest_beets.pdfIn PDF document text
    • http://tupusivamiguta.rf.gd/how_much_does_an_oklahoma_drivers_license_cost.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cf4b0bf1-43cd-415a-9f3e-1a67e1310f75/7927121142.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f6f0575-d215-4391-85ce-6af6fb419902/sword_art_online_season_4.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d9e165a4-711b-4970-8ed3-67264798473c/a_death_in_the_family_author_james_crossword.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/375ddc83-def9-4c1d-a026-a7650ba8d393/what_is_portfolio_management_pmi.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 5400 bytes
SHA-256: 45d75d02355c3b438839af81d5a9c72cae07d8bc199d589c604f93f6c758a022

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