PDF malware analysis — malicious · 4156a223018ebdda

MALICIOUS

PDF

72.0 KB Created: 2021-09-04 23:15:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 1f8a67d92f325b79de07a49088823649 SHA-1: 82da58ef92fcc13c323eca02946f02153b34eed6 SHA-256: 4156a223018ebdda14a04807f4af833bcfca7a442468fdf19d9daa8005079aba

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of links pointing to compromised websites, indicating a link farm designed to lure users to malicious content. The ClamAV detection and ML classifier strongly suggest malicious intent, likely for phishing or malware distribution. No scripts were extracted, and the document body was unreadable, but the heuristic firings and numerous unknown-reputation URLs are sufficient evidence.

Machine Learning

Nyx PDF Classifier malicious score 0.8214

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.larucheapain.fr/ljk/file/2422938969.pdf In PDF document text
- https://pinotcar.com/wp-content/plugins/super-forms/uploads/php/files/e1ba98f1dc1304a1a96ae2d2f56e53c9/10008937690.pdfIn PDF document text
- https://masterpieces-mallorca.com/wp-content/plugins/super-forms/uploads/php/files/004ee9e6cae8452740935077f22b0b13/33444469765.pdfIn PDF document text
- http://se-ty.ru/uploads/userfiles/file/13542369615.pdfIn PDF document text
- https://www.adler-leitishofen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160865d10933c2---66998101754.pdfIn PDF document text
- https://championsforchildren.org/wp-content/plugins/super-forms/uploads/php/files/50ba77d90b5abeb82cd4dae83c34c957/ropuvunubikoxatamoja.pdfIn PDF document text
- https://globalclassic.org/wp-content/plugins/super-forms/uploads/php/files/djfls5t8c7n36ahrudmv1mtpnb/46159820437.pdfIn PDF document text
- http://worldprint.su/userfiles/file/93881078336.pdfIn PDF document text
- http://www.victorian-manor.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160a1ba72106fa---gupevipoxupasupakitove.pdfIn PDF document text
- http://sage-chem.com/image/files/20210618_073013.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/1609785e5e3011---7533007461.pdfIn PDF document text
- https://amursvoidom.ru/media/files/26164175228.pdfIn PDF document text
- https://thejinglelab.com/wp-content/plugins/super-forms/uploads/php/files/almc0hgeh4ea1r33t97pd518t0/pimulenuzafunewufozoxazub.pdfIn PDF document text
- https://lexcochoralsoc.org/demo/lccs/beta/userfiles/files/3088997809.pdfIn PDF document text
- http://etoprosto.ru/ckfinder/userfiles/files/65932261659.pdfIn PDF document text
- http://yatros.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16071e4eceda02---biboremadamisufilodiw.pdfIn PDF document text
- https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/5bb1610637d59150712f68394065a547/92753413211.pdfIn PDF document text
- https://global-brand.net/userfiles/files/19345400875.pdfIn PDF document text
- https://asharfilalkulfi.com/ckfinder/userfiles/files/gusipezure.pdfIn PDF document text
- https://isuzuphonoi.com/data/dulieu/files/43453175348.pdfIn PDF document text
- https://santchavarabed.in/ckfinder/userfiles/files/semigoped.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=split+pdf+files+into+single+pagesPDF 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_off0000dee0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDEE0	17604 bytes
SHA-256: `934aa8f2cf7935f0caac8905d580e84840aff6157ffe7bf0038bd4f7283cffe2`
`font_01_sfnt_off00010be4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10BE4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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