PDF malware analysis — malicious · 9bbb392ab40637b1

MALICIOUS

PDF

80.0 KB Created: 2021-08-07 20:59:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 6dc7e9b08fc50dbb3561e67f35dfd251 SHA-1: fb5c58a1d3f97a932073dfbade63441bcc923343 SHA-256: 9bbb392ab40637b1de5f5c97ff2b0278989206e8531517da4cac96e144e48dcd

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of external links, many of which point to compromised WordPress sites. This behavior is indicative of a link farm designed to distribute malicious content or facilitate phishing attacks. The ClamAV detection further supports the malicious classification.

Machine Learning

Nyx PDF Classifier suspicious score 0.3497

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://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608147c828b25---98618682093.pdf In PDF document text
- https://www.nestroots.com/wp-content/plugins/super-forms/uploads/php/files/b0401egdnj0uorc9qg76fqqc27/selewiroxitanena.pdfIn PDF document text
- http://tms-operation.com/upload/files/53120507019.pdfIn PDF document text
- https://blugarden.eu/file/doterizaxupe.pdfIn PDF document text
- https://xn--64-mlcufjjaii0l.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/d53c80c208068bdf64ff9279b6455dba/furaveguzirubir.pdfIn PDF document text
- https://intelean.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b8d7d6d2d40---83241031441.pdfIn PDF document text
- https://www.nobleorthodontic.com/wp-content/plugins/super-forms/uploads/php/files/4ada8dde2a7f7d3ddd3bbab16610af0d/5694515946.pdfIn PDF document text
- https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16076cbec8b367---14254885447.pdfIn PDF document text
- http://brodart01.com/wp-content/plugins/super-forms/uploads/php/files/mih3cpng69qs86ega742qfd53p/ruzidal.pdfIn PDF document text
- http://bjsprt.com/uploadfile/file///2021060519425311.pdfIn PDF document text
- http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6f74a1a59d---vegutusewixateroni.pdfIn PDF document text
- http://www.a-fairys-choice.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d784348b9be---guvomegujo.pdfIn PDF document text
- http://abwalabamaave.com/uploads/files/tagodiboko.pdfIn PDF document text
- http://delshadian.com/public/userfiles/file/gowowazurorunevo.pdfIn PDF document text
- https://akemi.ro/hirek/file/jaluvitubumafuxurim.pdfIn PDF document text
- https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607fd3db44c2b---38455398477.pdfIn PDF document text
- http://amghanoi.com/images/ckeditor/files/jorefewibogabumufopo.pdfIn PDF document text
- http://triumphtoday.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609054b3137c1---30473856725.pdfIn PDF document text
- https://vizzzio.ru/wp-content/plugins/super-forms/uploads/php/files/47ba72476b4d9b5cfcfc0206bbbad433/93035343829.pdfIn PDF document text
- http://ucity1967.com/clients/f/f9/f95c10655bf48216a4b8c8e4321ec146/File/61054216499.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/f6a5ad584820f44b7056777db8937e59/54437261466.pdfIn PDF document text
- http://valeneighbors.com/userimages/19208949759.pdfIn PDF document text
- https://ccskin.com/geektic/files/86804170158.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160b73774449c7---74801455125.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=does+steelseries+arctis+pro+wireless+work+on+xbox+onePDF link annotation
- 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_off0000f99c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF99C	16976 bytes
SHA-256: `89495fe1253e90d006bdcd6f533152c5ec68163d879bf8ecf3d4c63b381aceca`
`font_01_sfnt_off000125b4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125B4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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