Malicious PDF — malware analysis report

Static analysis result for SHA-256 f227caaa5281ef88…

MALICIOUS

PDF

76.9 KB Created: 2021-06-01 16:07:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-07
MD5: cd677e764b9e39eba389d7c53a775497 SHA-1: 193ea58739b911c99dd41723115e805cf8b6d5d0 SHA-256: f227caaa5281ef88209e17819450ae8d980891144b696a99fd06e85a3cade624
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file contains an embedded URL that redirects to a link farm, a common tactic for phishing or malware distribution. The ML classifier and ClamAV detection strongly indicate malicious intent. Although no scripts were directly extracted, the PDF structure and embedded URI heuristic suggest it's designed to exploit users by presenting a seemingly legitimate document that leads to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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 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://irlanc.ru/pbw?utm_term=2001+honda+foreman+450+es+owners+manual PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4366989/normal_5ff57fd476ca5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4463543/normal_603e787a726a0.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4373241/normal_60035118cca69.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/9ac86b2f-4c8f-47df-96ed-51350bea39cc/rinnai_installation_price.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ad328a17-9d77-489c-b4df-854ef5bf1b79/tarowixonasabupesow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/73dc4cfc-3c81-4796-9f62-d16c667ca2ed/aeschylus_oresteia_shmoop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/358f33db-eda0-4431-8296-82e02949e5d3/bosch_800_series_washer_and_dryer_dimensions.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b2ded470-aaaa-4249-a921-ca30140e8f7e/schaums_outline_of_discrete_mathematics_third_edition.pdfIn PDF document text
    • http://dekokos.pbworks.com/f/cek_toko_sebelah_full_movie_facebook.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c5485504-9a68-4cd8-ab8e-6c4ca6caeff4/2016_kenworth_t680_cab_air_bag.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b65db841-45a8-4796-939e-21d3b8df5d67/58182678688.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e1e6aaa-287d-4cab-886c-bff26b77b7d2/95827918523.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/82fab9ff-9730-4620-9ceb-924c659e21d3/dirinodotejupuzesadesef.pdfIn PDF document text
    • http://visetululiv.pbworks.com/f/78411188959.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0e2ae7e2-d271-4dc6-a527-be84cae3fdbb/jonowupatolubajibanulol.pdfIn PDF document text
    • http://savavaze.pbworks.com/w/file/fetch/144454128/what_should_you_include_in_a_30_60_90_day_plan.pdfIn PDF document text
    • http://vajaxasave.pbworks.com/w/file/fetch/144461907/julew.pdfIn PDF document text
    • http://dipoziw.pbworks.com/f/what_is_the_highest_score_in_doodle_jump.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0c70c02f-1b7d-4d45-8665-f82be54c7fed/wuzuliget.pdfIn PDF document text
    • http://gazumadu.pbworks.com/f/indian_war_of_independence_1857_free_download.pdfIn PDF document text
    • http://xedidovetaw.pbworks.com/w/file/fetch/144416892/adanga_maru_tamil_movie_download_tamilgun_hd.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dfa3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDFA3 5436 bytes
SHA-256: 8cc0554aa3a526a1bc466c2d59ae1fa0634d3a5be3891bfadde06dcf8a43cda5
font_01_sfnt_off0000f1f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F8 10592 bytes
SHA-256: 8c170c248705d0dcabf6e692601a9e6f5a21e5b8f3b078f09bed08ce297f43f1
font_02_sfnt_off00011619.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11619 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333