PDF malware analysis — malicious · 641aa15d4a9adf48

MALICIOUS

PDF

86.0 KB Created: 2021-08-01 07:07:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: 74385916b8fc74b7af4f0023baff16a5 SHA-1: b5dd6b4e19e079085a7ee69037ff6053a7255198 SHA-256: 641aa15d4a9adf48b8eea1e56376cd5829c4d7ca7315c243ea435c41f57fa862

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains numerous links to external websites, many hosted on compromised CMS platforms or disposable domains, suggesting a phishing or malware distribution campaign. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious link farm designed to lure users to potentially harmful content.

Machine Learning

Nyx PDF Classifier malicious score 0.8415

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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://ketchas.ru/uplcv?utm_term=man+on+fire+full+movie+download+in+hindi+480p PDF link annotation
- http://anhuishangbiao.com/upload_fck/file/2021-4-30/20210430083835797264.pdfIn PDF document text
- https://www.taxikladis.gr/wp-content/plugins/formcraft/file-upload/server/content/files/16072f808709d2---lipaxulororive.pdfIn PDF document text
- https://www.sesc.com.ua/wp-content/plugins/super-forms/uploads/php/files/enr4ivs7hr2igv906k9uqa8020/62144483466.pdfIn PDF document text
- https://saftanton.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1606cf0f16085f---gogiwupikazituwikuzuxen.pdfIn PDF document text
- https://khangle.vn/uploads/images/files/20512621567.pdfIn PDF document text
- https://apoiotelecom.com/imagens/img_fckeditor/file/73406442036.pdfIn PDF document text
- http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/16082809159ab5---repanukowade.pdfIn PDF document text
- https://kuraniterbiye.com/resimler/files/fijagawojowun.pdfIn PDF document text
- http://antifftech.com/uploadfile/file///2021060516120890.pdfIn PDF document text
- https://attackworkoutprogram.com/app/webroot/files/ckfinder/userfiles/files/24752492511.pdfIn PDF document text
- https://oknoplus-omsk.ru/wp-content/plugins/super-forms/uploads/php/files/cc9b8b6734611597d656afd450756bf4/68493938788.pdfIn PDF document text
- http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/16072a200a05a7---84968292944.pdfIn PDF document text
- https://tsegypt.com/file/joxakepesuwupexidufarepe.pdfIn PDF document text
- http://congtyvima.com/images/Download/73510830401.pdfIn PDF document text
- http://daimarconstrucciones.com/images/admin/file/goxigotegiveraxos.pdfIn PDF document text
- https://www.sacproblemleri.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a597bf716---23433729964.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/nesisigave.pdfIn PDF document text
- http://studiotecnicomartani.eu/userfiles/files/8919124223.pdfIn PDF document text
- https://worldkelo.com/wp-content/plugins/super-forms/uploads/php/files/79ffa44adacbe8e6bddecf54124cd629/13678672635.pdfIn PDF document text
- https://cr2tek.com/userfiles/Proj_Name//files/88024129737.pdfIn PDF document text
- http://ccapostolicchurch.org/clients/1/19/19d200bce63520a637954fb60b162b1a/File/kilixitagobewig.pdfIn PDF document text
- https://unserbiokorb.ch/userfiles/file/lapegopejijefes.pdfIn PDF document text
- https://www.mercato.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d2ece1b3453---zefikevexanuvibopedoma.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000fca4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFCA4	11148 bytes
SHA-256: `3710bd47101c85425824f57db714905e3fbf71da45448ac1c3d45d5a1ac36790`
`font_01_sfnt_off00011682.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11682	17292 bytes
SHA-256: `c2f6dd97d78b6b484333d7f709a54fc76a448db03d1f4cd44a8195ff1f659fc5`
`font_02_sfnt_off000143b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x143B4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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