PDF malware analysis — malicious · 49a8f4a81db962b2

MALICIOUS

PDF

78.0 KB Created: 2021-08-12 04:21:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: e7773f5e290010047a3fd7e7d1910b35 SHA-1: 7a649cccbe0c3a9ffdf1cb3fb6d56bb52399df3b SHA-256: 49a8f4a81db962b2a52d98a1cb7ee7281fe6260814e35c715c06b722140ed1d9

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or trojan payload. It contains numerous links to external websites, many hosted on compromised WordPress installations, suggesting a link farm designed to redirect users to malicious content. The presence of external URIs and link farm heuristics points towards an attempt to distribute malware or phish for credentials.

Machine Learning

Nyx PDF Classifier malicious score 0.6759

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://infrive.ru/uplcv?utm_term=bose+soundlink+mini+ii+instructions PDF link annotation
- https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/f06055bbd1d1f5cf18f0d4574f61812f/60759941822.pdfIn PDF document text
- http://tornado69.com/clients/40643/File/wibitituwekipopodotipuzus.pdfIn PDF document text
- http://glina-master.ru/admin/ckfinder/userfiles/files/serusekogurijeroribute.pdfIn PDF document text
- http://www.canadiantreasurer.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0b240c46d7---juwalenatiwesamidiwa.pdfIn PDF document text
- http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ff47950b9---movagerigimuninudi.pdfIn PDF document text
- https://petek.biz/resimler/files/zoresosijudapizulotuditen.pdfIn PDF document text
- https://steklo-shik.ru/userfiles/file/xugazelutanitok.pdfIn PDF document text
- http://mueblesdepladur.es/1/userfiles/file/tewas.pdfIn PDF document text
- https://bomberosdenavarra.com/userfiles_nexo/files/22137218301.pdfIn PDF document text
- http://www.k-24.com/wp-content/plugins/formcraft/file-upload/server/content/files/160911af53fc1a---tunisiluxesuzizus.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160920ab1d0748---16755783522.pdfIn PDF document text
- http://soles2walk.cz/data/file/19986100026.pdfIn PDF document text
- https://skazkavdom.com/wp-content/plugins/super-forms/uploads/php/files/4178ffcb6968efbfca2853b425b6742d/tixofezojelaponur.pdfIn PDF document text
- http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/kmhmda4bsl9bmu37vun0g7nn01/dilututowapetejeponid.pdfIn PDF document text
- https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/3dau8vob3ac69kddg3jajj7m28/bagamo.pdfIn PDF document text
- http://toddfamilyreunion.com/clients/4/48/482e924d5a052aa4a0c13eb8a30e0bc8/File/renakuzuruxaramenuro.pdfIn PDF document text
- https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/3eebffc5b67efb512a8d01383d63ac43/bogozepitatudawuzemos.pdfIn PDF document text
- http://ranaghatpchsschool.org/userfiles/file/19418085888.pdfIn PDF document text
- https://centrobrands.com/wp-content/plugins/super-forms/uploads/php/files/002f41627967aa97504402aae4503524/63735871506.pdfIn PDF document text
- https://artasedanasingaraja.com/uploadfck/file/59311427249.pdfIn PDF document text
- http://www.alexgis.com/siteuploads/editorimg/file/zolifilope.pdfIn PDF document text
- https://mmszke.hu/files/file/52777463910.pdfIn PDF document text
- http://begemot-rus.com/uploadfiles/file/2021052005361373499.pdfIn PDF document text
- 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_off0000f4b9.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF4B9	10616 bytes
SHA-256: `cd36f7391b38d65cebba93226ae9adcc3b922f0dba47bfc805a85e1dfef3faa4`
`font_01_sfnt_off00010cfb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10CFB	17628 bytes
SHA-256: `d3708a52561795b19644b146972484af69684161d0666c7312b6d4a4f1e80df8`

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