PDF malware analysis — malicious · 42a949fb979e6bf3

MALICIOUS

PDF

95.6 KB Created: 2021-05-28 17:09:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07

MD5: 85dfcca00aa3033f67ca773510c0d1dc SHA-1: 81dded1ad07990b951db41fbbb981824976cf8cb SHA-256: 42a949fb979e6bf32447ab7ac6bd55e256f30bf752ebe3efd9a15ad120d723db

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm pointing to multiple compromised WordPress sites, suggesting an attempt to distribute malware or phish for credentials. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the presence of numerous external links and the nature of the heuristics suggest the document is designed to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.7939

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 http://www.alfainstal.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1608248b9a8f9e---ximedajimirewawobad.pdf In PDF document text
- http://mirembeestate.co.ug/wp-content/plugins/formcraft/file-upload/server/content/files/1608e68eec6c7f---mugodugazuratif.pdfIn PDF document text
- https://mithermomix.com.mx/wp-content/plugins/super-forms/uploads/php/files/6f88a7e7b3dcafecd5e97233f774e938/fodudibuzarupu.pdfIn PDF document text
- http://www.airportlimofortlauderdale.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607d38d5ccda1---59970943339.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095e44808bcc---10532972955.pdfIn PDF document text
- http://thegreenlegacykeepers.com/clients/e/e8/e8dc17949b7ef813e9937e453902477f/File/genolodezebotezizusuguz.pdfIn PDF document text
- https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/0cbcf24da0196d1a3b6bf0eceb2ac58e/semak.pdfIn PDF document text
- https://led7.ru/file/diwaxowagevase.pdfIn PDF document text
- https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/209513f5c90ef3ec4b1142e2e575186e/bevotaxutol.pdfIn PDF document text
- http://jeugdopdewetenschapsagenda.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1608dc249134b7---53146428531.pdfIn PDF document text
- https://viboot.com/ckfinder/userfiles/files/malis.pdfIn PDF document text
- https://dispomydeal.com/wp-content/plugins/super-forms/uploads/php/files/c4127ead34eeb65292f57ed7f9119856/tamupofijasezivoja.pdfIn PDF document text
- http://botanicgardenscafe.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606c83947dfc3---mamamoripabujefefidegu.pdfIn PDF document text
- https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1606f920062f7c---53286586257.pdfIn PDF document text
- https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/7l9e6ennnh062i89c6etc1inq7/31193549689.pdfIn PDF document text
- https://www.gml.de/wp-content/plugins/formcraft/file-upload/server/content/files/160940fa0ba388---lebun.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- http://fedorahosted.org/lohitIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=quimica+organica+wade+volumen+1+pdf+solucionarioPDF link annotation
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off00014a38.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14A38	4552 bytes
SHA-256: `2baef25f4c956e5ea910de2d889a67a8e1e2eed8c79741084c428737925cfc6d`
`font_01_sfnt_off00015a39.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15A39	5740 bytes
SHA-256: `48c510fa7047f9cdc7080b56af54f158de43258e4561069a05e438a9b8ce778c`
`font_02_sfnt_off00016dca.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x16DCA	3048 bytes
SHA-256: `89a639fcbed5e4ef82e32039950f7f452873e47a524ead236abee1ecb480f6cf`
`font_03_sfnt_off00017a20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x17A20	1756 bytes
SHA-256: `2103a056f476c52f1c6d089ac5beb75e1363abdbada9cf7f749b5a82f0f5de7e`

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