Malicious PDF — malware analysis report

Static analysis result for SHA-256 589befc4ebc380f6…

MALICIOUS

PDF

76.2 KB Created: 2021-02-26 05:14:05 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 83d7c60f5f76e358f2520d4c4c566213 SHA-1: 8c022dc5e7cb050c0cf4556c674ec6c34755f7a1 SHA-256: 589befc4ebc380f6cbbde3107b37ce63d9a7fa69effcdd1dbd0755e05a406cb4
126 Risk Score
Tags
free-cdn-ebook-manual-lure

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 0.9996

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://baarspo.ru/123?utm_term=business+analytics+masters+canada PDF link annotation
    • http://joy-todays.online/pillars_of_eternity_game_guidecrdln.pdfIn PDF document text
    • http://gisoboxizaza.mygamesonline.org/36792087767.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4372737/normal_5ffb623114219.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499622/normal_601785e9833b0.pdfIn PDF document text
    • http://mon-cmbretagne.best/beat_cop_switch_gameplayvc9do.pdfIn PDF document text
    • http://ronifibofizet.medianewsonline.com/will_there_be_a_harry_potter_tv_show.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461481/normal_600a3bd685241.pdfIn PDF document text
    • http://agentsoft.space/diced_potatoes_in_oven_with_cheese7bcg6.pdfIn PDF document text
    • https://cdn.sqhk.co/malofavu/cEMjfhf/class_9_physics_chapter_1_intext_questions_solutions.pdfIn PDF document text
    • https://cdn.sqhk.co/mupijuwo/78ijEjl/77623475068.pdfIn PDF document text
    • https://cdn.sqhk.co/mewobonovagi/Kha1C0b/biposejikafetefuwegugopo.pdfIn PDF document text
    • http://ig-socialmedia.xyz/vafenakogeptee5.pdfIn PDF document text
    • https://cdn.sqhk.co/bubesuzax/eIgjq0O/nigusaxunejevosir.pdfIn PDF document text
    • http://fotonagosuslugi-01.space/lp_hernia_umbilikalisjd2o6.pdfIn PDF document text
    • https://cdn.sqhk.co/delopomixaba/gCijjcE/architectural_draughtsmanship.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4497082/normal_601ac0b68991f.pdfIn PDF document text
    • http://help-bluebadgecustomer.com/naruto_ultimate_ninja_heroes_3_cso_english_highly_compressede3xv1.pdfIn PDF document text
    • http://jedilinosur.mywebcommunity.org/wonilemoju.pdfIn PDF document text
    • http://jenuxijaf.mygamesonline.org/open_office_editor.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464067/normal_600a710c225f8.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://nosigegu.onlinewebshop.net/duvatu.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_off0000ea52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA52 5236 bytes
SHA-256: 50b5d9a86b264deca01331fb7c409f689ed8d25814b2e163c60d9ccd97f9af6b
font_01_sfnt_off0000fc11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC11 11600 bytes
SHA-256: 73f9fecd3b0ba6560fa5087969642d55878506636e4737d0394744c7efdd79ac

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