PDF malware analysis — malicious · 07529ec61b310936

MALICIOUS

PDF

87.4 KB Created: 2021-09-08 05:32:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07

MD5: d2f6458d023dc1b1ab18acd596f4dae3 SHA-1: 73f3c59902a8396ecaf9f3078af6dfd7be44becb SHA-256: 07529ec61b31093616c0791771d6e0e1496c0322d8d74c05bb623fc26e376c2a

162 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The sample is a PDF containing embedded JavaScript, which is a common technique for delivering malicious content. It also functions as a link farm, directing users to multiple compromised WordPress sites and other domains, likely to host phishing pages or further malware. The ClamAV detection and ML classifier strongly indicate malicious intent, likely related to phishing or trojan distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.5045

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://crewmak.ru/uplcv?utm_term=self+efficacy+theory+bandura+pdf PDF link annotation
- http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160c40ce13dc48---likakidub.pdfIn PDF document text
- http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee789eb58a---xewezowu.pdfIn PDF document text
- https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160709d3a44fa3---jexufeleruvopoxeriluxif.pdfIn PDF document text
- https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/1610d0ed2c7f3f---vizixuvoxome.pdfIn PDF document text
- http://brownmahonefamilyreunion2015.com/clients/7/71/71b8b7811cafefaf2288418346dc0658/File/97219199464.pdfIn PDF document text
- https://lekkermooi.nl/userfiles/file/23580398650.pdfIn PDF document text
- http://hidropro.hu/upload/monapibul.pdfIn PDF document text
- http://iamsoldierfit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612bafa741fff---bikezowapeg.pdfIn PDF document text
- https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/93e436042de912ae5a037d44da0576ca/jafoxomomomozivadex.pdfIn PDF document text
- http://tikatalog.sk/_files/file/xutusasumabasovuna.pdfIn PDF document text
- http://www.rajpuc.pl/pics/file/14776403717.pdfIn PDF document text
- http://capmar.eu/userfiles/file/15106565749.pdfIn PDF document text
- http://twfbs.com/ckfinder/userfiles/files/36088073701.pdfIn PDF document text
- http://www.phsdcenter.com/temp/js/ckfinder/userfiles/files/22177657497.pdfIn PDF document text
- http://www.hypnotiseur.com/wp-content/plugins/formcraft/file-upload/server/content/files/160da9b2c19163---75586236954.pdfIn PDF document text
- https://securityguardsupply.org/php/uploads/file/3027839022.pdfIn PDF document text
- http://cayxaotamphan.net/userfiles/image/file/nuzeburamijodipo.pdfIn PDF document text
- https://www.kngroup.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ef7391bb4d---dobezudazoroxelozojok.pdfIn PDF document text
- http://ominocoibaffi.it/userfiles/files/tipusedomulovizifo.pdfIn PDF document text
- http://kondicionery-lubertsy.ru/upload_picture/file/16908164890.pdfIn PDF document text
- http://aliceinformaticasrl.com/user/pages/seviraxokefakewawinagowi.pdfIn PDF document text
- https://desertflying.club/wp-content/plugins/formcraft/file-upload/server/content/files/16070ba8db94f8---60611497663.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_off000100b8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x100B8	18448 bytes
SHA-256: `48c6e680179d5c85254eb7582e956a990199cb7c62f0123142978e35ba29951c`
`font_01_sfnt_off0001305c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1305C	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00014873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x14873	10976 bytes
SHA-256: `7f6c1ef318b7fa69f7a283f8aa37b7eeb4443b681db2c3c03edb0b469b74f33e`

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