Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b2e9af30e7db189…

MALICIOUS

PDF

81.6 KB Created: 2021-03-27 16:32:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-20
MD5: 66f9a169d557f4af78afc54934fc111d SHA-1: 6ec8f05b2c0c97f7f721d4a3ae9922372d7adc4f SHA-256: 5b2e9af30e7db1890a6642d581fcdc021a4057d0d3d777567c7c5fc4c0b2b952
126 Risk Score

Malware Insights

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

The PDF contains numerous embedded URLs, with one specifically identified as a lure for a phishing attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution. The presence of multiple external URIs suggests an attempt to redirect the user to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9992

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://maypoin.ru/strik?utm_term=what+does+a+cherry+tree+look+like+in+winter PDF link annotation
    • https://xidiziwuzubiwon.weebly.com/uploads/1/3/4/6/134653180/a5377bfee739e.pdfIn PDF document text
    • http://vowipeg.iblogger.org/pdf_abnormalitas_spermatozoa.pdfIn PDF document text
    • http://ryukzak.digital/best_robin_hood_movies_listgyhd4.pdfIn PDF document text
    • http://imedo.ru/yojana_magazine_august_2020zio5h.pdfIn PDF document text
    • http://erethiztzj.space/science_worksheets_for_10th_gradeulb8n.pdfIn PDF document text
    • http://hempmap.ru/excel_vba_code_listrh5cd.pdfIn PDF document text
    • https://gitapizi.weebly.com/uploads/1/3/2/6/132683136/d04b06f.pdfIn PDF document text
    • http://profit-makers.club/85103424619vx800.pdfIn PDF document text
    • http://tekdouche.xyz/zonosizezuterafewbjqe0.pdfIn PDF document text
    • https://buduruzuled.weebly.com/uploads/1/3/2/6/132682090/wuxivekam.pdfIn PDF document text
    • http://obschee.xyz/tebazewuvefolotujt9cna.pdfIn PDF document text
    • https://luvemolovod.weebly.com/uploads/1/3/4/3/134305721/019873.pdfIn PDF document text
    • http://taptopbot.com/service_properties_trust_dividend_2020rvoxn.pdfIn PDF document text
    • http://esplus.pro/63429583592ifw70.pdfIn PDF document text
    • http://trenketo.buzz/penny_stocks_to_buy_today_robinhoodfdoez.pdfIn PDF document text
    • https://sezibuginodeso.weebly.com/uploads/1/3/4/4/134470526/kuvav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://rokumezex.epizy.com/94173429582.pdfIn PDF document text
    • http://vuxubeso.rf.gd/how_to_get_works_cited_format_on_google_docs.pdfIn PDF document text
    • https://s3.amazonaws.com/toguvaju/24512427354.pdfIn PDF document text
    • https://s3.amazonaws.com/tobaziw/ge_refrigerator_ice_dispenser_not_working.pdfIn PDF document text
    • https://s3.amazonaws.com/xomepixo/dawak.pdfIn PDF document text
    • https://s3.amazonaws.com/besafefaf/xezavinukirenonutubixiwi.pdfIn PDF document text
    • https://s3.amazonaws.com/dugibabafod/3049079185.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_off0001026f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1026F 5300 bytes
SHA-256: 2d1c377ad057bc8104e3385b28d8ba0d34443448a223cac0a0157f6637098b78
font_01_sfnt_off00011489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11489 10508 bytes
SHA-256: be07f4726c2238c0d4b21b7695660cb020a71b6a4e8422e5ad3319873e828605

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