PDF malware analysis — malicious · 22da5e5952a85c2f

MALICIOUS

PDF

78.0 KB Created: 2021-08-04 11:46:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: d87ae172ab24562ad9894c53a29bd98d SHA-1: 36b4ed1d2f99174642bdd9d5aa63f82b636aa7ff SHA-256: 22da5e5952a85c2f47126934f3b2e5c841b7e8b5221105e9a1bd7309fb428568

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a phishing or malware distribution intent. It contains a link farm pointing to numerous external URLs, many hosted on compromised CMS platforms, suggesting it's designed to lure users to malicious sites. No scripts were extracted, but the presence of external links and the heuristic firings strongly suggest a phishing or downloader attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.8037

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://krisoc.ru/uplcv?utm_term=list+of+irregular+verbs+past+tense+pdf PDF link annotation
- https://plumcourse.com/wp-content/plugins/super-forms/uploads/php/files/89615f8aeb47eb64ad002268e3397f44/54423783827.pdfIn PDF document text
- http://woodwork.pl/ubezpiecz/obrazy/file/ninatepegukatosixonowes.pdfIn PDF document text
- http://eyupsifalibitkiler.com/resimler/files/23300486319.pdfIn PDF document text
- http://beckydavidsonhomes.com/wp-content/plugins/formcraft/file-upload/server/content/files/16087b5391f25f---kamudasazedowidumo.pdfIn PDF document text
- http://immobiliareborghi.com/userfiles/files/zonudowizatune.pdfIn PDF document text
- http://antiochhighclassof70.com/clients/4/4a/4a4d67c83f6236388cbe8d22d68d4f91/File/21241961349.pdfIn PDF document text
- https://alteanetworks.fr/img/file/jiremilizikedami.pdfIn PDF document text
- http://eros-arena.de/eros/userfiles/file/bafopemofajaraxapog.pdfIn PDF document text
- http://www.timtransportes.com/home/wp-content/plugins/formcraft/file-upload/server/content/files/16077c6f35ee0f---razobazowejirexapu.pdfIn PDF document text
- https://igruppe.no/ckfinder/userfiles//files/ribitilaze.pdfIn PDF document text
- http://spoanalyze.com/wp-content/plugins/super-forms/uploads/php/files/ffa14551a9cc81ab4dd1bdce20727d93/27024020242.pdfIn PDF document text
- https://rivaflo-south.in/userfiles/files/kopowozuvanorumezeza.pdfIn PDF document text
- https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/545be22304167c632f6cd406b49e728c/xulevuwanos.pdfIn PDF document text
- https://joebalogh.ro/imagini_ws/rarelawimu.pdfIn PDF document text
- https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff5337380a---gobilan.pdfIn PDF document text
- http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/974ee787c72e9e03df6cd2ba09db239d/raneregupuvu.pdfIn PDF document text
- http://secretlove.ch/ckfinder/userfiles/files/gafexodituzat.pdfIn PDF document text
- https://mariellatriolo.it/public/file/44246342504.pdfIn PDF document text
- https://jdbailbonds.com/wp-content/plugins/super-forms/uploads/php/files/3449fc8183e4779376148a6abe5f4407/36060407835.pdfIn PDF document text
- http://mko-yug.ru/wp-content/plugins/super-forms/uploads/php/files/1dd63b67b89d8e68877bb1fd492c44d6/5462728023.pdfIn PDF document text
- http://royalgroup.at/tmp/vupebabijadawizatov.pdfIn PDF document text
- https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/be771e6a7e0431127a76113b4583e781/88909479174.pdfIn PDF document text
- http://biometria.pl/photos_fck/file/7807470379.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_off0000f238.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF238	10936 bytes
SHA-256: `d5d87a20021621191c6f5ec1e400e900f704bda89153e9a586148a5e17911eca`
`font_01_sfnt_off00010b52.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10B52	17188 bytes
SHA-256: `0e0c7eb25aa0394dc5b3ad857df978d1dfb196dfc2ee120844f3e0800efcb264`

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