PDF malware analysis — malicious · 6c964e8a0543633b

MALICIOUS

PDF

62.5 KB Created: 2021-09-17 19:37:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12

MD5: e72fab4ac3129eafe8b71c85bffc8a14 SHA-1: 4f0687bef91737e644662654c7a807ecfec8b671 SHA-256: 6c964e8a0543633b81507a9d3321443ebae676a545ce80b1fc8fb22e5218fdf3

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and a significant number of external URIs, many of which point to compromised CMS upload storage. The heuristics indicate a link farm designed to redirect users to potentially malicious content, likely for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification.

Machine Learning

Nyx PDF Classifier suspicious score 0.2574

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://cructi.ru/uplcv?utm_term=cricket+7+download+for+android PDF link annotation
- http://ednak.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135d72c865a6---mifanir.pdfIn PDF document text
- https://prettygreekvillas.com/admin/fckeditor/editor/filemanager/connectofile/83157947514.pdfIn PDF document text
- http://harlit.com/ckfinder/userfiles/files/20210911_070907.pdfIn PDF document text
- http://quangcaovuanh.com/vietkiendo/upload/file/pejopiziragigavun.pdfIn PDF document text
- http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1612f148013a96---sofaxuwuvetes.pdfIn PDF document text
- https://shinko-tw.com/UserFiles/file/29803902222.pdfIn PDF document text
- http://fmafirm.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/70561270185.pdfIn PDF document text
- https://curtain.jinware.com/upload/files/gizakujupikeg.pdfIn PDF document text
- https://costabravas.com/uploads/localidades/files/fulogojakixenogozexosubu.pdfIn PDF document text
- http://arucax.am/user_images/file/63024486058.pdfIn PDF document text
- https://mintowncoffee.net/uploads/images/files/18205673822.pdfIn PDF document text
- http://cl-metalparts.com/d/files/bunuzarapojusurisemolu.pdfIn PDF document text
- http://cgmorenanews.com.br/ckfinder/userfiles/files/76224922716.pdfIn PDF document text
- https://encoyun.com/calisma2/files/uploads/12122601680.pdfIn PDF document text
- http://www.yoko-ono.be/images/userfiles/file/61295033870.pdfIn PDF document text
- http://cnsgafgl.netsociality.com/upload/files/39094820000.pdfIn PDF document text
- https://www.agro-zavod.ru/app/webroot/js/ckfinder/userfiles/files/12120277378.pdfIn PDF document text
- http://harposwebdesign.nl/app/webroot/files/userfiles/files/fubizefa.pdfIn PDF document text
- https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/10a52fc85031237414f63dbac659e4f4/41030222679.pdfIn PDF document text
- http://sangjeom.com/userfiles/file///ranugesepadenepepajiwoze.pdfIn PDF document text
- https://zemiigori.com/uploads/file/jekuzavewenefolalopavox.pdfIn PDF document text
- https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc3627adaa---42128006479.pdfIn PDF document text
- http://unitez.net/images/newtech/files/64704893450.pdfIn PDF document text
- http://allineers.morefriendship.com/upload/files/68469896208.pdfIn PDF document text
- http://paitoonbox.com/userfiles/files/lanonoxa.pdfIn PDF document text
- http://glassick.com/userfiles/file/67139389368.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_off0000b4da.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB4DA	10560 bytes
SHA-256: `37745eea0fa877a12c7f307e3493584b665be45fec086e98dd4ab66361db5544`
`font_01_sfnt_off0000cd37.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCD37	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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