PDF malware analysis — malicious · da6486b01ef49b54

MALICIOUS

PDF

69.3 KB Created: 2021-09-26 05:59:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 3af71ebcd8c81c66410b7b51b51e177a SHA-1: 296e3e5533108a372d8f93613cb73ab0c658a39d SHA-256: da6486b01ef49b5499760438a1c62e11d399e0c7e20da1554911a482a2db589f

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is a PDF containing numerous embedded URLs, many of which point to compromised websites and link farms. The ClamAV detection and ML classifier indicate malicious intent, likely phishing or malware distribution. The PDF structure and embedded links suggest it's designed to lure users to external, potentially malicious, resources.

Machine Learning

Nyx PDF Classifier malicious score 0.5541

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://queure.ru/uplcv?utm_term=limbo+x86+emulator PDF link annotation
- https://inmaabiladi.com/userfiles/files/8698241933.pdfIn PDF document text
- https://alshaabcoop.com/userfiles/file/18225757942.pdfIn PDF document text
- http://shinserviceodi.ru/wp-content/plugins/super-forms/uploads/php/files/eb1f3ab8e5426089c031d3232e871896/91157746359.pdfIn PDF document text
- https://almavilag.hu/files/files/3831272224.pdfIn PDF document text
- http://andersonlawdecorah.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/meforuxonubetojosoperi.pdfIn PDF document text
- http://gidaero.com/upload/fckeditor/file/movegizutukametawobawez.pdfIn PDF document text
- http://ediljolli.com/userfiles/files/xogosowelivetakun.pdfIn PDF document text
- https://satesayap.com/contents/files/98117785484.pdfIn PDF document text
- https://greenways.at/userfiles/file/rifewevitoderiruxuzuj.pdfIn PDF document text
- http://sportingclubalbinia.eu/userfiles/files/29858952999.pdfIn PDF document text
- https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/609cd0231f0b0237d4b656d0756d2dcf/nasiluwomunagabegidade.pdfIn PDF document text
- http://michardardillier.com/ckfinder/userfiles/files/tewigefozozogib.pdfIn PDF document text
- https://drticket.ir/basefile/drtiketcom/files/16734318150.pdfIn PDF document text
- http://swhwsolution.it/ckeditor-ckfinder-integration/uploads/files/wofewojapejalos.pdfIn PDF document text
- http://liderzy.natura2000.pl/imgturysta/files/50318221494.pdfIn PDF document text
- https://palcev.ru/userfiles/file/50582658657.pdfIn PDF document text
- http://arablift.net/userfiles/file/24065473409.pdfIn PDF document text
- https://camphacement.vn/upload/files/kuxaluvonoge.pdfIn PDF document text
- http://salsainkonstanz.de/media/files/xilusogite.pdfIn PDF document text
- http://impressivetravelvietnam.com/upload/files/vajigelifivevalovuwofufov.pdfIn PDF document text
- https://bokaichenyu.com/upload/files/53675703221.pdfIn PDF document text
- http://dostrojar.sk/UserFiles/file/givawudidaz.pdfIn PDF document text
- https://phuquiland.com/upload/files/76023827766.pdfIn PDF document text
- https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/8e4cvumh72fsupnsif20to2osm/sogijivo.pdfIn PDF document text
- http://phubozena.pl/userfiles/file/rabixene.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000b5f3.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB5F3	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000ce0a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCE0A	10672 bytes
SHA-256: `d812206376b6e6d812eb4101d1d9b2c1019e10c3c96fc10b76ef0d92856f263f`
`font_02_sfnt_off0000e68b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE68B	18564 bytes
SHA-256: `6008c8d7199837d63ab84721b51e58f7500d1064552ad51e9860e95231d42ef3`

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