PDF malware analysis — malicious · 950afbf5cf5059c3

MALICIOUS

PDF

88.2 KB Created: 2021-09-02 01:45:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c2c6134e1d30d6a66a0b9f9248044951 SHA-1: d2d3cbcd365624d3546aa5858da6ccc61f5879e2 SHA-256: 950afbf5cf5059c33147e7be444f43f1bb87133e580980577d33f9e0be5df18e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and an ML classifier. It contains numerous external URIs, many of which point to compromised CMS upload storage or are hosted on disposable domains, indicating a link farm designed to redirect users. The presence of these links suggests an attempt to lead users to phishing sites or download further malicious content.

Machine Learning

Nyx PDF Classifier malicious score 0.9905

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://imapcb.org/wp-content/plugins/super-forms/uploads/php/files/cde421439c3e5ff2cf69047a6465704d/xevenebufu.pdf In PDF document text
- http://mn-print.ru/ckfinder/userfiles/files/rikoj.pdfIn PDF document text
- https://radio-aurea.eu/files/file/xilizogunidexeji.pdfIn PDF document text
- https://leicht-spb.ru/wp-content/plugins/super-forms/uploads/php/files/81df410edbe9233c20b89c224aa5ad0f/8803968720.pdfIn PDF document text
- https://www.acptechnologies.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2fe2adbafd---31333669718.pdfIn PDF document text
- http://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606fe3ca587a7---pexajukukalap.pdfIn PDF document text
- https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/0712fc208ec60faa456e799cccef702d/purevokax.pdfIn PDF document text
- http://studioriboldi.eu/userfiles/files/likovidisupamusuwub.pdfIn PDF document text
- https://pensiuneavlasin.ro/wp-content/plugins/super-forms/uploads/php/files/fv9ctqdo2idn89jde4dtcnrv7j/77752798299.pdfIn PDF document text
- https://dmvassociates.com/wp-content/plugins/super-forms/uploads/php/files/34bd3f5ded71235fc0e5e9aff1fa5948/jufuzenipedu.pdfIn PDF document text
- https://ludifrance.fr/userfiles/file/fisazeta.pdfIn PDF document text
- https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a5f6b675173---jovavobabukavadubo.pdfIn PDF document text
- http://antonioruizabogados.es/userfiles/file/kofibaxosemoravomazopibel.pdfIn PDF document text
- http://md-servicios.com/userfiles/file/digababil.pdfIn PDF document text
- http://www.christinemartin.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/1610e63d749d94---zimulofeforadipavixoj.pdfIn PDF document text
- https://siangyun.com/upfiles/editor/files/1016265817.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160b05f88d3f5c---36007611713.pdfIn PDF document text
- http://cgt-fo-csc.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160928e36bd82f---domejirekir.pdfIn PDF document text
- https://muratay.nl/userfiles/file/84481627010.pdfIn PDF document text
- https://perleyparish.org/wp-content/plugins/super-forms/uploads/php/files/8b8cc4cbdd5f023027a64a7114eca719/dekiginumigas.pdfIn PDF document text
- http://lovesushiscv.com/uploads/files/jaxowidisadenikavitogunif.pdfIn PDF document text
- https://transturist.ba/ckeditor/ckfinder/files/files/toxeva.pdfIn PDF document text
- http://media-production.net/admin/ckfinder/userfiles/files/kakavuzotuzokanekeg.pdfIn PDF document text
- http://dogable.de/userfiles/file/16576962028.pdfIn PDF document text
- http://victorylimo1.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a4afd0900c1---vizozewomo.pdfIn PDF document text
- https://www.auditek.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1607d42ae200dd---vefabowebi.pdfIn PDF document text
- http://huichem.com/ckfinder/userfiles/files/wudebilojozulodonu.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=cotton+picking+minute+urban+dictionaryPDF 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_off0000f1e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF1E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000109fa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x109FA	17864 bytes
SHA-256: `0e2b57095bc0dc244d5db3e2d1a27ea5d9073e5d2aedf710bf9bc38a55fc7898`
`font_02_sfnt_off00013909.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x13909	11120 bytes
SHA-256: `8e8c6321fc10d81cd82834cdcad7b785209dda66abeb83d674f09e9940201b09`

Open this report in the interactive analyzer, or submit your own file for analysis.