Malicious PDF — malware analysis report

Static analysis result for SHA-256 c6787673de46e2b4…

MALICIOUS

PDF

78.1 KB Created: 2021-03-26 07:21:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-27
MD5: d6273af4f66e8ad47fb540f1c430eedb SHA-1: af02ebb6807b3b454640604a9dace894ff6a29d4 SHA-256: c6787673de46e2b402c61ab42188ae7bdc1e9e2f7ad07ffbe478614f0fcdd483
126 Risk Score

Malware Insights

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

The PDF contains embedded URLs and heuristic firings indicating it is a link farm designed to redirect users to malicious sites. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URLs point towards an attempt to redirect users to potentially malicious content.

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://druttle.ru/strik?utm_term=how+to+get+games+on+ti+84+plus+ce+without+a+computer PDF link annotation
    • http://xugutolajon.22web.org/burnham_serial_number.pdfIn PDF document text
    • http://nekuwagibajese.getenjoyment.net/85075932853.pdfIn PDF document text
    • https://cdn.sqhk.co/burexewejam/hhKQjfd/dibugizomewumiwerel.pdfIn PDF document text
    • http://plafond.xyz/vuwoliwegopilopulo26d4.pdfIn PDF document text
    • https://cdn.sqhk.co/bijukipuj/jgc1mLO/14815232353.pdfIn PDF document text
    • http://xuxisozolawub.22web.org/descargar_la_culpa_es_de_la_vaca_1_y_2_gratis.pdfIn PDF document text
    • http://osummer.space/code_coverage_report_jestmui4s.pdfIn PDF document text
    • http://ripugusulufiluj.getenjoyment.net/96160157725.pdfIn PDF document text
    • http://1xbet-football.fun/97583397716pimpf.pdfIn PDF document text
    • https://cdn.sqhk.co/wemowubire/FNgi76K/iphone_theme_for_oneplus_6t.pdfIn PDF document text
    • http://mujudesuxiropa.sportsontheweb.net/making_money_online_surveys_canada.pdfIn PDF document text
    • http://pemizirevubel.mywebcommunity.org/magic_treehouse_book_series_reading_level.pdfIn PDF document text
    • https://cdn.sqhk.co/tinipuded/ii86hcB/traducir_picaporte_en_ingles.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/aab7a290-8a20-4dad-8852-7a006d4b15fa/54330360858.pdfIn PDF document text
    • http://sazojojuw.rf.gd/building_construction_illustrated_5th_edition_download.pdfIn PDF document text
    • http://jezevenakos.myartsonline.com/83903748579.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0cfb90d2-ef38-4dbf-8bf1-c167309fb1fd/30120475098.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/144b41ff-cfe1-4fe1-9b61-1ca3279a6c8a/jenuvuzuxebow.pdfIn PDF document text
    • http://fuxufotab.epizy.com/tosinisozoxeboxusu.pdfIn PDF document text
    • http://ratesedefavure.epizy.com/utility_warehouse_meter_reading_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/562477c3-9168-42ee-95b9-0db33a93f1d6/richboytroy_net_worth.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f15192fe-ca69-4566-9333-d5aec2b2d312/33508567060.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_off0000f280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF280 5684 bytes
SHA-256: 3bbde0ae00f0093f848171b7b4eef5de44517e8685073e03d4e0aa928f6aa54b
font_01_sfnt_off000105ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105CE 10732 bytes
SHA-256: 194ea50a8f83e21ff9a26b189ed2389ea8ae0adf51e4a2be30cddac2f0d17f25

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