PDF malware analysis — malicious · 8670c4dcd9f4414c

MALICIOUS

PDF

115.3 KB Created: 2021-06-29 04:03:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-20

MD5: 198700d78f8c6751833375cb1a2460e9 SHA-1: 44b190ffc8b8b02d70b87623565df3b7fa3044a3 SHA-256: 8670c4dcd9f4414c493864dd0eda50745a02cbcb5e6840c40ba593e37ed1f42d

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or disposable hosting, suggesting a link farm or phishing lure. The PDF structure and embedded URLs point towards an attempt to redirect users to malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9777

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL

The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
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://foundryindia.org/userfiles/file/voxeposoba.pdf In PDF document text
- https://bechtoldpaving.com/wp-content/plugins/super-forms/uploads/php/files/0abf03f3ae81b35f774fc05c2e553bc9/wiluvafugemozawor.pdfIn PDF document text
- https://alamansyria.com/userfiles/file/gazosijolikuliwokob.pdfIn PDF document text
- http://portalcom-b2b.es/img/user///file/_0764508001621489418.pdfIn PDF document text
- https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/a54c5a4bc25fa9deff5311bd527da02d/8321265101.pdfIn PDF document text
- http://beiwendq.com//data/attachment/file/debisupipejakazin.pdfIn PDF document text
- http://castrolmintabolt.hu/images/upload/file/gupepo.pdfIn PDF document text
- http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160965db4f0472---tafeledoripasizefato.pdfIn PDF document text
- https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/0b4f528a32b30aced853e291be4d6a91/bujuvenojomijuzolenoser.pdfIn PDF document text
- http://yuseigachi.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a9ab17bad60---92653229883.pdfIn PDF document text
- http://www.uvhk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160982a0f672f4---18065965793.pdfIn PDF document text
- https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608ea30b7f09d---4442508386.pdfIn PDF document text
- http://xn--80aaffebba2apgigwiiececnggk9e4k.xn--p1ai/pict/file/80575146410.pdfIn PDF document text
- https://rclurie.com/wp-content/plugins/super-forms/uploads/php/files/df8f9ba61648e3d91fb838b41a26719a/faxesusetew.pdfIn PDF document text
- http://joshuadacosta.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8a2cf18b1f---megilitivosi.pdfIn PDF document text
- https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160c661fe351ec---26099497878.pdfIn PDF document text
- https://www.temsilcisitesi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16070635be5211---63058064667.pdfIn PDF document text
- https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/9e0541a012595c27a85c2ad4e9ab4be9/37233343021.pdfIn PDF document text
- http://wypelnienia.kratex.pl/wp-content/plugins/super-forms/uploads/php/files/a83fa7c48369d09641c5448ad22fbfd9/4816784633.pdfIn PDF document text
- http://ampletrekking.com/userfiles/file/putoni.pdfIn PDF document text
- http://kingnature.ru/files/files/mejasapamarosa.pdfIn PDF document text
- http://plusbateria.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b04b4758486---3596533842.pdfIn PDF document text
- https://inchirierielicopter.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1608b3925ecf5f---tegas.pdfIn PDF document text
- https://yingzhaoliuart.com/upload/file/xaputunofixumatewuxameno.pdfIn PDF document text
- http://worksafeorg.com/wp-content/plugins/super-forms/uploads/php/files/grvcd01idkt11q96acskfb57i0/wejidilewolavajuzinojidud.pdfIn PDF document text
- https://personnelcle.com/userfiles/file/pabikokezalepujuvusidad.pdfIn PDF document text
- http://maxtarget.by/ckfinder/userfiles/files/finerowojosoliwamep.pdfIn PDF document text
- http://webcertain.net/contentupload/fckeditorUploads/organization_/file/75124106177.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=assumption+of+mary+holy+dayPDF link annotation
- http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
- http://purl.org/dc/elements/1.1/In PDF document text
- http://ns.adobe.com/pdf/1.3/In PDF document text
- http://ns.adobe.com/xap/1.0/In PDF document text
- http://ns.adobe.com/xap/1.0/mm/In PDF document text
- http://ns.adobe.com/xap/1.0/rights/In 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_off00015bfb.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15BFB	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0001740d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1740D	19148 bytes
SHA-256: `11a2d0f8ae9b9e43cc0fe60af2a205a9419ceb7aa1143fbaab2303543d825679`
`font_02_sfnt_off0001a549.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1A549	10828 bytes
SHA-256: `5bb2c87f16d710435ed33f580e84f2d88678dad9525a7a041d14a3ed577b2f99`

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