PDF malware analysis — malicious · e5e909360eeccdc9

MALICIOUS

PDF

66.4 KB Created: 2021-10-15 01:34:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25

MD5: 88880a975cf8cffdf9d997afd947265f SHA-1: 3d987eebd95cc9fb5d9dce51abb47eae1582b752 SHA-256: e5e909360eeccdc9571448de59ace5e6e9083f753eb37f97e278ab0a974c5448

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was detected as a phishing trojan by ClamAV. It contains embedded JavaScript and numerous external URIs, many of which point to compromised CMS uploads or disposable hosting, forming a link farm. The embedded JavaScript likely facilitates the redirection or download of further malicious content, contributing to the phishing or trojan delivery objective.

Machine Learning

Nyx PDF Classifier suspicious score 0.4625

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://irlanc.ru/uplcv?utm_term=control+systems+engineering+nise+6th+edition+pdf PDF link annotation
- https://zd-zeta.com/uploads/files/202109062050539350.pdfIn PDF document text
- http://domuran.pl/files/file/nejovarufatatajikodar.pdfIn PDF document text
- http://www.unidacardoso.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1615d62d6df7e1---tutomijar.pdfIn PDF document text
- http://zeroseistudio.eu/userfiles/files/88898973468.pdfIn PDF document text
- http://suachuaspa.com/upload/images-content/files/rilapavivorewo.pdfIn PDF document text
- https://astoraccessories.com/uploads/ckfinder/files/50087033922.pdfIn PDF document text
- http://gianniarnaudo.com/userfiles/files/xujujoborowi.pdfIn PDF document text
- https://piti.leaddeehub.com/userfiles/files/27423316204.pdfIn PDF document text
- http://hanhthien.net/uploads/file/16088582322.pdfIn PDF document text
- http://goddesshair.net/upload/users/files/budotivuvipozoxibaxoje.pdfIn PDF document text
- https://bevillelecomte.ovh/ckfinder/userfiles/files/gavitaliziforifakozowobu.pdfIn PDF document text
- https://forssah.co/userfiles/file/86521526203.pdfIn PDF document text
- http://huspanda.com/data/ckfinder/files/22699716347.pdfIn PDF document text
- https://gotoko.com/cmsv2/upload/files/63494033339.pdfIn PDF document text
- https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614a1892a3161---pikowigevugawebakexa.pdfIn PDF document text
- https://shinyjewellers.com/wp-content/plugins/super-forms/uploads/php/files/ob4n31q2ulq7986o4vdk5mcb7l/tatafonorofimamefixuz.pdfIn PDF document text
- https://totounited.com/contents/files/14813323553.pdfIn PDF document text
- https://interior-mark.com/ckfinder/userfiles/files/46796873028.pdfIn PDF document text
- http://wedding-box100.com/uploads/files/202109261320041060.pdfIn PDF document text
- http://swiftnb.com/ckfinder/userfiles/files/wowol.pdfIn PDF document text
- https://www.santaterezinha.com.br/js/ckfinder/userfiles/files/21520592404.pdfIn PDF document text
- http://vinhthuan.com/upload/files/tiwexibemesef.pdfIn PDF document text
- http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/44995044487.pdfIn PDF document text
- http://shrlie.com/upload_fck/file/2021-9-15/20210915205538634152.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_off0000d318.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD318	11096 bytes
SHA-256: `94145633e33b612a3df907ba3681efe1e397876fc7a31008b11e4523c8a5f835`
`font_01_sfnt_off0000ec9f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC9F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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