Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01b54931f8e688f…

MALICIOUS

PDF

58.2 KB Created: 2021-09-19 03:44:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 37fffaf7dc04ae3798fae2cfeb85bec7 SHA-1: 0e263b9c7dd3f9de0d757e54a0187ab4f5ea6cd5 SHA-256: f01b54931f8e688fd6a8fbdf3d484336b903b147f3f47ddc08ab4ac478346233
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous external URIs and link farms, with many pointing to compromised CMS uploads or disposable hosting. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further indicate malicious intent. The document's structure suggests it's designed to lure users into clicking links that likely lead to phishing sites or malware downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5046

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://synerhu.ru/uplcv?utm_term=wallpaper+for+redmi+note+9s+punch+hole PDF link annotation
    • https://classconnbio.com/img-jacson/files/vigilidewuvosepupa.pdfIn PDF document text
    • http://yucehukuk.com/resimler/files/nazonerufupisiw.pdfIn PDF document text
    • http://chiangmai-esc.net/user_img/files/fijobibugenololuzonokulez.pdfIn PDF document text
    • http://investinwielkopolska.pl/application/lib/ckfinder/userfiles/files/20353789140.pdfIn PDF document text
    • http://www.immiflex.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b8ce5b892c---wewasawi.pdfIn PDF document text
    • http://www.protectakoteasia.com/ckfinder/userfiles/files/mabudaxejenerib.pdfIn PDF document text
    • https://gallerylingard.com/uploads/file/37549567535.pdfIn PDF document text
    • http://snieznik.pl/userfiles/file/natefuduzebake.pdfIn PDF document text
    • https://tuoitre.bacgiang.gov.vn/lib/ckfinder/files/vowebevon.pdfIn PDF document text
    • https://cam-ceeds.org/ckfinder/userfiles/files/26790912248.pdfIn PDF document text
    • http://novastal.pl/userfiles/file/98522489131.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/16145d15ae86e1---kawob.pdfIn PDF document text
    • http://vocal.bpv.su/content/files/files/mafitewirojos.pdfIn PDF document text
    • http://splhardware.com/UploadFile/file/2021090208494073499.pdfIn PDF document text
    • http://theprofitnesstrainers.com/userfiles/file/71339786003.pdfIn PDF document text
    • http://zhouzhuanx.com/v15/Upload/file/20219616121508.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/44987361749.pdfIn PDF document text
    • https://www.chortho.co.uk/wp-content/plugins/super-forms/uploads/php/files/vgeka2813jh0cktier7dbt4gug/77418531226.pdfIn PDF document text
    • http://campingwithconvenience.com/files/files/ninegorifosines.pdfIn PDF document text
    • http://mdtrend.hu/files/file/muripumuwebib.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/161305d4e794d2---pewofamavivar.pdfIn PDF document text
    • http://europeanprofservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/161465b35cbbfa---38002860970.pdfIn PDF document text
    • https://used-machinetools.ro/app/webroot/files/userfiles/files/pokiridikidakipi.pdfIn PDF document text
    • https://ibeguiristain.com/userfiles/files/kesonogopogolosodolimuzo.pdfIn PDF document text
    • http://wxmx.cn/upload/ckimg/files/202109131534134276.pdfIn PDF document text

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