PDF malware analysis — malicious · 3d84a85870f11d98

MALICIOUS

PDF

95.8 KB Created: 2021-08-06 00:34:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: ec7177510c37f5277dc1542c9aa193fa SHA-1: 7d81f032710944389d55fb047f27412e7c15116b SHA-256: 3d84a85870f11d98bf83bc2dfd31262e22523203bdf416423f585d45666ffd52

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many pointing to compromised websites or disposable hosting, characteristic of a link farm used to distribute malicious content. Heuristics indicate it's a link farm and potentially a phishing lure, with ClamAV detecting it as a phishing trojan. The ML classifier also strongly flagged it as malicious.

Machine Learning

Nyx PDF Classifier malicious score 0.9902

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 http://jamessham.com/admin/usercontent/file/wedawijiginexobubuxofuto.pdf In PDF document text
- http://nek.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb33229fa5---vibugewirobifulufo.pdfIn PDF document text
- http://eaeocs.com/clients/c/c7/c75ed17bfa54634cfc1039f1b599a7e7/File/1472932208.pdfIn PDF document text
- https://pelicanfinancialnetwork.com/ckfinder/userfiles/files/linokusiwamogujon.pdfIn PDF document text
- https://aldurra.ly/images-editeur/img/file/jeminezoj.pdfIn PDF document text
- http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/1609573b4dc0cb---43065417990.pdfIn PDF document text
- http://www.bridalchapel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bde49043605---32410315063.pdfIn PDF document text
- http://yourhealthyanswer.com/ckfinder/userfiles/files/luluwajojopuwev.pdfIn PDF document text
- http://mini-garden.ru/userfiles/file/41423449609.pdfIn PDF document text
- https://chaplains-camps.org/upload_picture/file/89065231338.pdfIn PDF document text
- https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/af8a6fb7dcb93fa101e909f8d14e9e68/gobepupe.pdfIn PDF document text
- https://clap-bas.com/userfiles/file/31820422487.pdfIn PDF document text
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160d66ebd5ea73---33341924146.pdfIn PDF document text
- http://immobilieninvestors.eu/userfiles/file/23733407459.pdfIn PDF document text
- http://www.gunyagder.org.tr/wp-content/plugins/super-forms/uploads/php/files/arqq3fqsc79rsdfkseq15525p6/baxidabewerizodu.pdfIn PDF document text
- http://www.sospapa24.com/lib/ckfinder/imgupload/files/92833968772.pdfIn PDF document text
- http://www.finanzanlagen-honorarberatung.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087714ea599b---kapomimo.pdfIn PDF document text
- https://regalcabs.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1607eae7f5cfd2---milanatipopetubomi.pdfIn PDF document text
- https://petroblend.com/wp-content/plugins/formcraft/file-upload/server/content/files/16078bae287df3---xibibenimagu.pdfIn PDF document text
- https://auto826.com/uploads/files/61344842383.pdfIn PDF document text
- https://sanruouvang.net/images/uploaded/file/21873386268.pdfIn PDF document text
- https://www.poolsrus.com.au/application/third_party/ckfinder/userfiles/files/96251434145.pdfIn PDF document text
- http://phatnang.com/media/ftp/file/relelo.pdfIn PDF document text
- https://www.focus.mu/wp-content/plugins/super-forms/uploads/php/files/e02b067da8c91dcd3b0ee2bcb287daa8/minaxewesorutid.pdfIn PDF document text
- https://thejasmineway.net/wp-content/plugins/super-forms/uploads/php/files/p91dd90u8ag1fg4oh22i74qnko/7241815346.pdfIn PDF document text
- https://behagi.eus/files/galeria/files/zulufevirojin.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=simple+compound+complex+sentences+practice+4+answer+keyPDF 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 4

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000f810.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF810	16200 bytes
SHA-256: `65d2db144c93b891c93abceb9cadbdce46e75894cf1fc40aca2f2412ebf6d896`
`font_01_sfnt_off00010de1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10DE1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off000125f8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x125F8	11324 bytes
SHA-256: `91bed35765d210c89acb909ba35c8958639f660690ba3669f6b4e2ee16c818be`
`font_03_sfnt_off000140ab.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x140AB	18056 bytes
SHA-256: `56c291081e5be3d8ac933973378da65f7ab456efaf060567f1415c950021c8a0`

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