PDF malware analysis — malicious · c8593331d5f12f99

MALICIOUS

PDF

67.7 KB Created: 2021-09-02 06:08:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 673f6de727c223ab71f32ac1632dbc54 SHA-1: 4fa7223cd7f5e0c4c97390be4a515616d7e7f8cb SHA-256: c8593331d5f12f99f5631fa8a90d770b15d06ce1ad0a049a693323f0fac21cc2

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF employs a common screenshot lure technique, presenting an image that hides a clickable link. This PDF contains numerous external URIs pointing to various domains, many of which appear to be compromised WordPress sites. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. No scripts were extracted, but the embedded URLs are the primary indicators of compromise.

Machine Learning

Nyx PDF Classifier malicious score 0.9886

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 67 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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://medvor.ru/uplcv?utm_term=what+happens+if+you+eat+red+meat+on+good+friday PDF link annotation
- https://nikoljski.com/ckfinder/userfiles/files/55685977987.pdfIn PDF document text
- https://postelezmasivu-zlin.cz/ckfinder/userfiles/files/73885817315.pdfIn PDF document text
- https://vakukh.ru/wp-content/plugins/super-forms/uploads/php/files/a6cff685a3bfd68cb908cdf6c9a2404f/mepowujagafafiwa.pdfIn PDF document text
- http://longearedhounds.com/clients/65743/File/jasugawelanofiralasunol.pdfIn PDF document text
- https://inchiriereelicopterromania.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16090be8335d2c---61974349442.pdfIn PDF document text
- https://fototipia.hu/files/files/19038757327.pdfIn PDF document text
- http://dom-nenilovo.ru/wp-content/plugins/super-forms/uploads/php/files/e521ee3904df321f324e9822bd8a53cf/kisesabo.pdfIn PDF document text
- http://www.commandinglife.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cd4d1576500---wepij.pdfIn PDF document text
- https://unicornproduction.gr/wp-content/plugins/super-forms/uploads/php/files/ec32c163d1a5c7e203c4482a8c5d248f/12131227794.pdfIn PDF document text
- https://regiefranchet.fr/userfiles/files/53785377503.pdfIn PDF document text
- http://www.icareonline.net.au/ckfinder/icare/files/36445954897.pdfIn PDF document text
- https://absoluteanytime.com/media_file/files/files/narulikil.pdfIn PDF document text
- https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/d79561a58be31b2e861d4c799caee2a0/zogexigezamabajuj.pdfIn PDF document text
- https://www.parkgest.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a419d853df1---45628840291.pdfIn PDF document text
- http://w-mill.jp/images/file/sixup.pdfIn PDF document text
- http://cargo3030.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c931391da78---252156660.pdfIn PDF document text
- http://train-in-japan.com/images/blog//file/87555858180.pdfIn PDF document text
- http://homespakistan.net/magzine/uploadfiles/file/sozadateradab.pdfIn PDF document text
- https://merydian.pl/nowymerydian/userfiles/file/82831472642.pdfIn PDF document text
- https://baxsporthorses.nl/userfiles/file/xukupajifosesopevobasise.pdfIn PDF document text
- https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/75a1daa887ad5e593710df2a3274b2d3/givitafave.pdfIn PDF document text
- http://orvosvalaszto.hu/uploads/files/jalimoduwidikukakoto.pdfIn PDF document text
- http://avvocato-callegaro.it/public/file/kanos.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc65491c79---86075908821.pdfIn PDF document text
- http://wsystem.sk/userfiles/files/39232238007.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_off0000be01.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBE01	14280 bytes
SHA-256: `da4c94f7358f96ca0af74954bd1e2f5c42697fcda51c684552bec3b93a8bd876`
`font_01_sfnt_off0000e18b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE18B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0000f9a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF9A2	11104 bytes
SHA-256: `3593c70f0d753e57c58e65b0237ae2da708784361de67243caa5348fc16c3ae6`

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