PDF malware analysis — malicious · 65e93e029b230479

MALICIOUS

PDF

90.0 KB Created: 2021-08-15 00:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 3eb474b35aac2c7c61646a1e46e86672 SHA-1: bb6545aaf7e18d9878776f0239563f5d91a563fd SHA-256: 65e93e029b230479a5e7784e4f977444975d3e5a2323cf7ad6d63402f70fe27b

94 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous embedded URLs pointing to compromised websites, indicating a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious. While no scripts were extracted, the presence of multiple compromised CMS upload links and disposable hosting suggests an attempt to distribute malicious content or manipulate search engine results.

Machine Learning

Nyx PDF Classifier malicious score 0.6392

Heuristics 4

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://crysiq.ru/uplcv?utm_term=exerc%C3%ADcios+sobre+estrelas+constela%C3%A7%C3%B5es+e+gal%C3%A1xias+6+ano PDF link annotation
- https://lecachet.fr/docs/files/58733062718.pdfIn PDF document text
- https://blackknowledge.com/wp-content/plugins/super-forms/uploads/php/files/4342cf09e3f198408dc23477731376cc/bowasalizugamajevokofe.pdfIn PDF document text
- http://aristosaigonhotel.vn/uploads/files/xivunurosamiferotajav.pdfIn PDF document text
- http://sklepjola.pl/userfiles/file/losamimozenixezukejoxivok.pdfIn PDF document text
- http://tomlitkom.ru/ckfinder/userfiles/files/tametar.pdfIn PDF document text
- https://omomediacion.com/wp-content/plugins/super-forms/uploads/php/files/b52c92b13bf185bdfde4b10aef379bd6/79211977169.pdfIn PDF document text
- https://livingcircles.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1607b5944ee356---soluxotebego.pdfIn PDF document text
- http://laros.cz/UserFiles/file/45476146277.pdfIn PDF document text
- http://centrumbiznesurawicz.pl/userfiles/file/92568417916.pdfIn PDF document text
- https://nailseasupportgroup.com/wp-content/plugins/super-forms/uploads/php/files/f9f8708e03ed1cf727dd5b84e5de9e06/zodofet.pdfIn PDF document text
- https://reifenscho.de/wp-content/plugins/formcraft/file-upload/server/content/files/160bac948a75ca---sevotadujuzajavonigaler.pdfIn PDF document text
- http://gramercygrand.ru/files/file/49549305630.pdfIn PDF document text
- https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/2575490bc002916dd189a9041de22192/zukinus.pdfIn PDF document text
- http://techbico.vn/uploads/image/files/36836453740.pdfIn PDF document text
- https://www.sacda.org/wp-content/plugins/super-forms/uploads/php/files/tc8li0e7bk9r702c6t24a3h5h4/fofutodupade.pdfIn PDF document text
- http://reklama-kemerovo.ru/files/files/diwivareri.pdfIn PDF document text
- https://www.ccs-corporation.com/ckfinder/userfiles/files/37986806175.pdfIn PDF document text
- http://anhuicrew.com/upload_fck/file/2021-5-2/20210502173007461830.pdfIn PDF document text
- https://www.sevgiliyevideo.net/wp-content/plugins/formcraft/file-upload/server/content/files/160faff3ae275d---foxudolebozub.pdfIn PDF document text
- https://dmddsgn.com/wp-content/plugins/super-forms/uploads/php/files/07bdffc7a7851108d22e38dd78fadaad/6454662177.pdfIn PDF document text
- http://www.manorbymajor.com/userfiles/files/bixuvijinat.pdfIn PDF document text
- http://tai-yang.tw/taiyang/upload/file/kaxubu.pdfIn PDF document text
- https://dbjadow.pl/attachments/file/sukoman.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_off00011b20.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11B20	11460 bytes
SHA-256: `77b701241440f3439fc58ba7b88dc3e82434348800f736bd099d1b55ef793d3a`
`font_01_sfnt_off00013555.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13555	21716 bytes
SHA-256: `7dd5e83c2047619abdae2785082aae0aabe35ec9d3f2ce1c8d64a442cf48ce27`

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