Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ea00853f7da9d27…

MALICIOUS

PDF

74.9 KB Created: 2021-03-03 07:29:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 3bc4a225dbbaddf4c7fb011103ff21cc SHA-1: f3f7c0acde1d5b7361f8ec2ba956b1b0c223717d SHA-256: 2ea00853f7da9d2772f4e85a24e3d3ac855c2d5cce8586b974905efffc71cb40
134 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. The presence of numerous external URIs, many on disposable hosting, suggests a link farm designed to redirect users to malicious sites. The 'SE_URGENCY_LURE' heuristic indicates the document likely uses deceptive language to prompt user interaction, such as clicking on the embedded malicious links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://vilenefex.ru/123?utm_term=qcy+t2c+price+in+uae PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4457570/normal_5fd7b2a21ec27.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4404107/normal_6011886c0c34f.pdfIn PDF document text
    • http://kindraretterath.com/example_of_job_application_letteroqob3.pdfIn PDF document text
    • https://ruvesupiranaduk.weebly.com/uploads/1/3/5/3/135314660/mojod_deratewono.pdfIn PDF document text
    • http://blu-ital.space/dekanimazironoxuwim25ltg.pdfIn PDF document text
    • https://tafibukazun.weebly.com/uploads/1/3/5/4/135400045/wanopanigonanopomonu.pdfIn PDF document text
    • https://vuxabodunufa.weebly.com/uploads/1/3/1/4/131407539/xogofovuwup.pdfIn PDF document text
    • https://pepomujotopulog.weebly.com/uploads/1/3/4/8/134873529/zaxenu.pdfIn PDF document text
    • http://kopuvimu.scienceontheweb.net/47734098814.pdfIn PDF document text
    • http://stalekost.site/how_do_you_set_a_casio_atomic_watch6mk5x.pdfIn PDF document text
    • http://mozobadijoba.medianewsonline.com/nobemamakebemono.pdfIn PDF document text
    • https://zalidumi.weebly.com/uploads/1/3/5/3/135351231/nimuneledaruv.pdfIn PDF document text
    • http://gapijet.scienceontheweb.net/dewalt_planer_dw734_wont_feed.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4468294/normal_6031e09a7a764.pdfIn PDF document text
    • http://tusiteguluvora.getenjoyment.net/radukibufugowi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4457332/normal_60179a7e2010e.pdfIn PDF document text
    • http://farozemirig.scienceontheweb.net/79768521679.pdfIn PDF document text
    • http://martans.space/83562938620zjp6k.pdfIn PDF document text
    • http://nomevufaneboja.mypressonline.com/dd-wrt_default_router_ip.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4459916/normal_602720bd13323.pdfIn PDF document text
    • http://lighttravel-ng.com/silent_hunter_wolves_of_the_pacific_modsje6yp.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4443576/normal_60083bdbb2b05.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn 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_off0000dc92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDC92 2952 bytes
SHA-256: e211f2d6e0d1bf1fd17bd5150bc2724fb7c0f1d37b1c69b855d9dcad8de34ab0
font_01_sfnt_off0000e720.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE720 5012 bytes
SHA-256: c965b1d95e87d56e352a10ccff782035ce06f5e03b36e022471cef5c05ee148b
font_02_sfnt_off0000f84b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF84B 11084 bytes
SHA-256: bd0c40808805144fce85c1e4e5ce8953bfa8ca37c8e100f79293f07c0382bfd5

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