PDF malware analysis — malicious · 09d2c6d5a56a01a1

MALICIOUS

PDF

80.9 KB Created: 2021-07-31 19:17:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 2d75e142c52d1594527a8fd6d1b580b5 SHA-1: b13fa89561fad1a2afa081cd21fd750a99295fee SHA-256: 09d2c6d5a56a01a1d6329d1f07cced5bd5fb6d8558e7e24e3404a6c29d76b78e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains a link farm pointing to compromised WordPress upload storage, suggesting an attempt to obscure the ultimate destination of the malicious payload. The embedded URLs likely serve as lures to trick users into downloading further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9987

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.
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://smidgel.ru/uplcv?utm_term=propiedades+fisicas+y+quimicas+de+los+materiales+odontologicos PDF link annotation
- https://drahmetbostanci.com/wp-content/plugins/formcraft/file-upload/server/content/files/160abdf25dd4c7---22070642563.pdfIn PDF document text
- http://ceskylakros.cz/userfiles/file/sodisepatitepife.pdfIn PDF document text
- https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/re2la9rh06v6hlb7ra1mddgsr2/89856258448.pdfIn PDF document text
- http://gernano.eu/gfx/userfiles/files/faxifuziwuwufex.pdfIn PDF document text
- https://www.die-umzugsfabrik.com/wp-content/plugins/formcraft/file-upload/server/content/files/160721a2fbae25---manewakenamererurazako.pdfIn PDF document text
- http://ildungrice.com/fileupload/fckeditor/file/64500790953.pdfIn PDF document text
- http://inarchengineering.it/userfiles/files/soraxesiju.pdfIn PDF document text
- http://ingenermarket.ru/userfiles/88913518891.pdfIn PDF document text
- http://grandbarnettfamily.com/clients/a/a0/a01b80d98e57c38af56892ab55e7d82f/File/18927426444.pdfIn PDF document text
- https://festival.bg/fckeditorfiles/file/jefilubipetosa.pdfIn PDF document text
- https://digitaldaya.com/imagenes/file/zenonexotamejofefewajaxo.pdfIn PDF document text
- http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c4c8980ac6b---83591454038.pdfIn PDF document text
- https://noticky.net/akce/fotky/file/48031282448.pdfIn PDF document text
- http://www.mediagrand.hu//data/editorfile/kebonukepiva.pdfIn PDF document text
- https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/32ccvkhij5f5fd6rp5gra7s0e3/93339431666.pdfIn PDF document text
- https://sakitonus.ru/wp-content/plugins/super-forms/uploads/php/files/4e89582962f70f98945d1f17fd7bd9b4/26390041509.pdfIn PDF document text
- http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e8cd1e9e6b---solidinosev.pdfIn PDF document text
- http://syarmarka.ru/userfiles/files/76100465401.pdfIn PDF document text
- https://www.perfumista.co.uk/wp-content/plugins/super-forms/uploads/php/files/31ecd0909a735bf41f868326cf4e9091/96860998283.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af97fd3a2ff---83187906411.pdfIn PDF document text
- http://steelbo.com/uploads/admins/u0/files/20210703235742.pdfIn PDF document text
- https://webupdate.ca/wp-content/plugins/super-forms/uploads/php/files/4hv376emf9ka8qnlgspp4f9afm/vitadezijorisanuxifamu.pdfIn PDF document text
- https://eliteswimmingpoolsinc.com/wp-content/plugins/super-forms/uploads/php/files/sd3hbknh18e04cgplk7idda610/zusiloxude.pdfIn PDF document text
- http://sh8ke.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f05abbb211a---xumelomibekasobizuzugimow.pdfIn PDF document text
- http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160fc2c83de4a1---79261561344.pdfIn PDF document text
- 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_off0000d30e.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD30E	18084 bytes
SHA-256: `9919370d9ed14593dc0220ef7e072739c75b7583e8e0eb5a64a19a5540fcba83`
`font_01_sfnt_off0001003d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1003D	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011854.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11854	11324 bytes
SHA-256: `985738e01b7708f3e5b51438db8cb5c06efde1346604b3b76aa6d29f367707ae`

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