Malicious PDF — malware analysis report

Static analysis result for SHA-256 f501655be9303b4c…

MALICIOUS

PDF

64.0 KB Created: 2021-09-18 22:35:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: f6f3d634714c4e353fbd114d60f011bc SHA-1: 2899b56b299a2bfaa116456842cadeef9e85e362 SHA-256: f501655be9303b4c03b2ddfdaf473cd9ac8da65b0c3649d0e5fde84c3785059b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The heuristics indicate the PDF contains a link farm pointing to compromised WordPress uploads and disposable hosting, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the links and the ML classifier output strongly suggest malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6738

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 http://behtarinekhodetbash.com/files/files/63298087709.pdf In PDF document text
    • http://saigonford3s.com/uploads/2021-09-14/images/files/zemivodu.pdfIn PDF document text
    • http://xn--dlek-5qa.com/admin/UserFiles/file/toletutulonib.pdfIn PDF document text
    • https://myhoorayhealth.com/wp-content/plugins/super-forms/uploads/php/files/780ee9b8dfa1f343fcbd5249659d32fa/joxisuf.pdfIn PDF document text
    • http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161314e419d9bd---11987152114.pdfIn PDF document text
    • http://feldbach-tourismus.at/files/fuzol.pdfIn PDF document text
    • https://nitm.ac.in/nitmeghalaya/ckfinder/userfiles/files/78898981154.pdfIn PDF document text
    • http://interreg-ipa-husrb.com/downloads/liperawekibanur.pdfIn PDF document text
    • http://andlupa.com/userfiles/file/sirewadororew.pdfIn PDF document text
    • http://xn--80aafjbaeihgganggf9ajkncugh2a.xn--p1ai/pict/file/bozoxezukuvasaxo.pdfIn PDF document text
    • https://vaitinhdien.com/app/webroot/upload/files/mowovowitisumamuriz.pdfIn PDF document text
    • http://juentai.com/userfiles/files/wuxaxeb.pdfIn PDF document text
    • http://botosani.ro/img/uploads/file/zabimogodakekek.pdfIn PDF document text
    • https://sf-tfi-pgu.uz/wp-content/plugins/super-forms/uploads/php/files/203412e5ba87abef4f3ae8fcc8a00ed1/28023305934.pdfIn PDF document text
    • http://birons.net/wp-content/plugins/super-forms/uploads/php/files/2ee675b5c8fae88ce015bcf3f5546d7c/91308971258.pdfIn PDF document text
    • http://www.gieskestukadoors.nl/ckfinder/files/files/lolajikuzuxe.pdfIn PDF document text
    • https://vipbeachhouse.com/uploads/editor/file/70857958953.pdfIn PDF document text
    • https://ukmalayalamnews.com/userfiles/file/49991506472.pdfIn PDF document text
    • http://otohyundaidanang.com/uploads/image/files/39195781466.pdfIn PDF document text
    • http://darec.sk/files/files/gefiveb.pdfIn PDF document text
    • http://marketypik.pl/zdjecia/fck/file/69406312803.pdfIn PDF document text
    • http://f1-rennsimulatoren.de/userfiles/file/luxapilarelu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/cv9VXjIrmdE/uplcv?utm_term=deleting+cookies+on+android+phonePDF link annotation
    • http://irodori.kir.jp/files/file/25141905890.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ea43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA43 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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