PDF malware analysis — malicious · 973cfc970a661711

MALICIOUS

PDF

85.9 KB Created: 2021-07-26 00:29:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04

MD5: 628fff2c2e360dee56d41f8f21d462cc SHA-1: e948c6bf17ecafd4d4579ae07a477880adba1ad3 SHA-256: 973cfc970a661711beab699842a74a82afe4ba7c5981dc3f316fec4e217e9704

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier suspicious score 0.4225

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 http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160a6cb40e0f48---34184955711.pdf In PDF document text
- http://veivel.com/userfiles/file/mofafamevilulemugadukun.pdfIn PDF document text
- http://www.novosib-sport.ru/ckfinder/userfiles/files/15489899042.pdfIn PDF document text
- http://childhood-matters.com/clients/49507/File/keleritulilutosuvurixogob.pdfIn PDF document text
- http://totalfinance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160b64eff88a7e---nibunet.pdfIn PDF document text
- http://www.louthadventures.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16094731ce5f3a---sijumifekumelorakeriku.pdfIn PDF document text
- https://goldengrowers.com/wp-content/plugins/super-forms/uploads/php/files/163fa952747361b7b17e8362c80bfeab/bamural.pdfIn PDF document text
- https://www.mybizwebsites.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f177f156f1---fowuxelep.pdfIn PDF document text
- http://studio-castiglioni.com/userfiles/files/8911042771.pdfIn PDF document text
- http://www.melloecastro.com/wp-content/plugins/formcraft/file-upload/server/content/files/16086d47083e2e---15530595306.pdfIn PDF document text
- http://es-umzuege-transporte.de/wp-content/plugins/super-forms/uploads/php/files/236916a8a3eb1909c4c93281cc97677b/nuritiwuvitevegan.pdfIn PDF document text
- http://tele-video.ru/upload/files/mojuxiwirurebifidefare.pdfIn PDF document text
- https://brod-plovdiv.com/images/zefipakevudafuwixumudud.pdfIn PDF document text
- http://aggengr.com/uploads/CMS/file/1280451829.pdfIn PDF document text
- http://valdhans.cz/userfiles/file/dokofurineriwuguvagafun.pdfIn PDF document text
- https://www.grecosalesinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c20bc9e5db---12393982742.pdfIn PDF document text
- https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/8a0ba95a7eab1336977dbf1e6d02daa6/73893517430.pdfIn PDF document text
- http://holidayinntorino.com/userfiles/files/70163102551.pdfIn PDF document text
- https://unique-u.biz/images/uploads/file/kijonaxaxe.pdfIn PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/3am4ekkr7t23lmis6k14149br4/tafusodexezirinor.pdfIn PDF document text
- https://www.pfgpartners.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160c5039eb0f36---21086186961.pdfIn PDF document text
- http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5ae588d9c2---gukona.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=how+carbon+capture+technology+could+help+protect+our+earthPDF link annotation
- https://sharpspringwww.kinsta.cloud/wp-content/plugins/super-forms/uploads/php/files/73b9164200b98d317589becf9b6177ee/36337143865.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_off0001061f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1061F	17096 bytes
SHA-256: `f72e29ca5aa110766c3c4f9e2eb4311b2316f6e4bcf3b014603e989550001faf`
`font_01_sfnt_off000132a2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x132A2	10964 bytes
SHA-256: `a5062f9d024d83528ed874e70fe118c11b7c077484d5da17048290f67cf42edb`

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