Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2e35dabef743a25…

MALICIOUS

PDF

94.0 KB Created: 2021-06-01 12:39:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fd472fed21da7e6326d61b6a269efcd8 SHA-1: 65e3e63ae3f394b3e9a4d90ee4af4a98cafeab88 SHA-256: f2e35dabef743a25ec919f1fb63020975509a104af42b090637b4c5d14e88392
184 Risk Score

Malware Insights

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

This PDF document contains a large number of external links, many pointing to disposable hosting services, suggesting a link farm or phishing lure. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous external URIs are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for malicious actions.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8826

Heuristics 5

  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://irlanc.ru/pbw?utm_term=ar+10+lower+blueprint+pdf
    • https://nizidisifa.weebly.com/uploads/1/3/4/5/134505067/4364423.pdf
    • https://metonokosaza.weebly.com/uploads/1/3/2/6/132681587/4226511.pdf
    • https://static.s123-cdn-static-d.com/uploads/4421629/normal_60b2a1257599d.pdf
    • https://vadenupajupav.weebly.com/uploads/1/3/4/3/134345777/2633275.pdf
    • https://difidewuwigexej.weebly.com/uploads/1/3/4/6/134652805/65921de2d3d0.pdf
    • https://nurowilalivep.weebly.com/uploads/1/3/1/3/131380447/5543358.pdf
    • https://lusanazuwade.weebly.com/uploads/1/3/4/0/134000197/1064881.pdf
    • https://cdn-cms.f-static.net/uploads/4392877/normal_60495292b70fc.pdf
    • https://cdn-cms.f-static.net/uploads/4403119/normal_60260809585ee.pdf
    • https://bonagimeduvutup.weebly.com/uploads/1/3/1/4/131453121/setesunezolakif.pdf
    • https://ladevizeloraben.weebly.com/uploads/1/3/1/6/131606454/a7ae51ab4a.pdf
    • https://jekufagiz.weebly.com/uploads/1/3/0/7/130739150/0ee704e5c12a62.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://taxexuwej.pbworks.com/w/file/fetch/144453363/how_to_record_a_video_and_upload_to_canvas.pdf
    • http://bofamawetodo.pbworks.com/f/how_to_change_3d_view_to_2d_in_autocad_2018.pdf
    • http://foxobekizax.pbworks.com/f/how_do_i_prepare_for_amazon_business_analyst_interview.pdf
    • http://jajafad.pbworks.com/f/tapovobedixaniboluzuxuv.pdf
    • https://uploads.strikinglycdn.com/files/10c2d259-3b6e-4b2d-ac22-c13ba2ec1e1d/jesuguroledebumorepum.pdf
    • http://mumasenekera.pbworks.com/w/file/fetch/144426759/todipixawonojewezizu.pdf
    • http://mukonisu.pbworks.com/f/87865889103.pdf
    • http://sodopateduke.pbworks.com/w/file/fetch/144424761/descargar_libro_diario_contabilidad_excel.pdf
    • https://uploads.strikinglycdn.com/files/50d02ae4-77fb-4a0e-ade3-26a51af20876/35793132748.pdf
    • https://uploads.strikinglycdn.com/files/c13431d1-be6b-430c-949a-09661ae57f72/fluke_434-ii_and_435-ii_power_quality_and_energy_analyzer_price.pdf
    • http://fotikeralo.pbworks.com/f/technical_analysis_and_stock_market_profits_by_richard_schabacker.pdf
    • http://wuvebag.pbworks.com/w/file/fetch/144425163/backup_whatsapp_da_android_a_iphone_google_drive.pdf
    • http://pamotekegopa.pbworks.com/f/codominance_multiple_alleles_worksheet_answers.pdf
    • http://scripts.sil.org/OFL

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014d39.bin
de43f32a89e7ca82364595696a5556530e30b2e46a21d793c235a72f8f26704e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x14D39 5060 bytes

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