Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab5500d845421a3b…

MALICIOUS

PDF

70.8 KB Created: 2021-04-24 21:20:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 38e86752ee9e7f5db499d183d78f941e SHA-1: 7ae8959833cb463b020dc9cfd9c7bd637fbcedfd SHA-256: ab5500d845421a3b9c39de96e0266621323d2a7b6531212a38b1beeae5094d52
124 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 link farm on disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the PDF structure itself points to a malicious link farm.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8215

Heuristics 4

  • 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://leonvi.ru/strik?utm_term=hisense+portable+air+conditioner+300+sq+ft+parts PDF link annotation
    • http://productwood.ru/how_to_day_trade_stock_optionslywjg.pdfIn PDF document text
    • http://negodebozebe.iblogger.org/bioplastic_manufacturing_process.pdfIn PDF document text
    • http://mavito.online/google_chrome_offline_installer_latest_versionjk53e.pdfIn PDF document text
    • http://spain50off.info/331349363016y0ux.pdfIn PDF document text
    • http://nokirixako.iblogger.org/travel_guides_commentator.pdfIn PDF document text
    • http://meetchat.space/alinco_dx-sr8_for_salebzuhj.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://xafamikipu.epizy.com/nobiwojemejaxu.pdfIn PDF document text
    • https://s3.amazonaws.com/forupokisip/philips_universal_remote_srp9232d_27_code_list.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8ef34f2c-66ac-4c7e-be7f-935864fdcd57/65688111584.pdfIn PDF document text
    • http://zosatomoviwom.rf.gd/caballito_de_mar_reproduccion.pdfIn PDF document text
    • https://s3.amazonaws.com/jokotaziweluge/4413824984.pdfIn PDF document text
    • http://wijotifiku.rf.gd/keylab_49_essential_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f0cef259-cb23-41fc-b88b-5c477839f4a2/the_righteous_mind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc17814e-1a94-4797-be84-79ecc1a9cf53/krk_rokit_5_g4_pair_price_in_india.pdfIn PDF document text
    • http://lozerur.rf.gd/types_of_bariatric_surgery.pdfIn PDF document text
    • https://s3.amazonaws.com/davolazupivowi/flipkart_online_shopping_double_bed_sheet.pdfIn PDF document text
    • http://xafotibelazes.rf.gd/729512149.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a1bdc279-86b3-41fd-acc8-e7b745c02dd5/89066895935.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/94000454-caa7-44c9-b83d-827b71817fad/luvigezejamakutix.pdfIn PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f36f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF36F 5684 bytes
SHA-256: 1c49c72d6b767138e42161802a6fff2ba068f23d79ed2b0cfbc78fbec4c33bef