PDF malware analysis — malicious · 582c837e4bf2a548

MALICIOUS

PDF

85.3 KB Created: 2021-07-26 09:09:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: 4207a4278a9ee5f105f5e28428448afa SHA-1: 46de764f81b5b06aa600df9a22485757a78c1df0 SHA-256: 582c837e4bf2a548c5300727f127d224f254f4e130b73f2f1e73edc7fc679434

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, directing users to multiple compromised WordPress upload storage locations and other disposable hosting sites. The primary goal appears to be to lure victims to potentially malicious websites, likely for phishing or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.7517

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://budapestpainter.hu/ckfinder/userfiles/files/39688334717.pdf In PDF document text
- https://mmszke.hu/files/file/pirorujifira.pdfIn PDF document text
- http://kgmda.com/upload/files/15566062624.pdfIn PDF document text
- https://muzeumkonstancina.pl/attachments/file/56860978644.pdfIn PDF document text
- https://m-co.de/wp-content/plugins/super-forms/uploads/php/files/kpmmit5ch4eadnpf3ubp5nbqan/pipebufomaxadajowug.pdfIn PDF document text
- https://kogan-photo.ru/wp-content/plugins/super-forms/uploads/php/files/38e422d81d2b404743e2a06dc2ae42ae/dawokugevaxas.pdfIn PDF document text
- https://blindnow.com/userfiles/file/mimeferewaresuzema.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16085d352d9190---jagekoxizefulumefowiboje.pdfIn PDF document text
- https://freedomtampons.com/wp-content/plugins/super-forms/uploads/php/files/2d19309daa14329304332bb5ff476f98/42988626441.pdfIn PDF document text
- http://toyteepee.com/uploadfiles/file/210610195056634949snpryw.pdfIn PDF document text
- https://arizonapoolcontractor.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd9bf62c71f---savibox.pdfIn PDF document text
- http://manufim.co.il/wp-content/plugins/formcraft/file-upload/server/content/files/1607d2b1169c05---zagodezebujo.pdfIn PDF document text
- https://xn--78-6kce7dfhb9dwb.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/74765cee542ac5fcadddd3df60dac650/61495421208.pdfIn PDF document text
- https://www.ijestr.com/ckfinder/userfiles/files/94511914808.pdfIn PDF document text
- http://fusen-es.info/yamituki-n/uploads/files/vozag.pdfIn PDF document text
- https://cashmeredreams.com/wp-content/plugins/super-forms/uploads/php/files/a6c9a57bbda99cd69297a081ed291151/paniforox.pdfIn PDF document text
- http://www.naturapreserved.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bf94c79a94a---vezidezokowida.pdfIn PDF document text
- https://yourtuscanyguide.com/wp-content/plugins/super-forms/uploads/php/files/h97fmd1866udu91k80kmcfsvc6/44186712585.pdfIn PDF document text
- https://tailormade-sales-marketing.com/userfiles/file/vugejaviziketukowi.pdfIn PDF document text
- http://endustriyelkiralama.com/wp-content/plugins/super-forms/uploads/php/files/j8okdnnl9gnifshj93s2m528n0/muvem.pdfIn PDF document text
- http://originalcheck.it/public/img_admin/file///lewulowes.pdfIn PDF document text
- https://luxmarketing.agency/wp-content/plugins/super-forms/uploads/php/files/qhrcj5bee6v18q0oa1o2aei735/fotamagevuxoje.pdfIn PDF document text
- https://bio86.net/fichiers/nonak.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=what+can+i+substitute+for+buttermilk+in+ranch+dressingPDF link annotation
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0001084a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1084A	11248 bytes
SHA-256: `cf200a9d4252334ea7ebf8b03f79a13e31810a02b2c56024547716306bc671f6`
`font_01_sfnt_off00012246.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12246	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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