PDF malware analysis — malicious · 07374d3a9b84c2b6

MALICIOUS

PDF

84.9 KB Created: 2021-09-02 00:02:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: c5a4dedba06759b5cbda54e8cf692ec0 SHA-1: b65db530839816479bc0ab395fce08b1d479026e SHA-256: 07374d3a9b84c2b6a310bda14381d9552c405830dedb7c5072cd8a93196d23c1

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier. Static analysis revealed it functions as a link farm, with numerous URLs pointing to compromised WordPress sites. These links likely serve as a lure to redirect users to malicious or phishing content, a common tactic for initial access via spearphishing attachments.

Machine Learning

Nyx PDF Classifier malicious score 0.9919

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 http://mattstergamer.com/wp-content/plugins/super-forms/uploads/php/files/geafpnsn6624j8dr3srpv31cbj/44073698095.pdf In PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/9df70993cb8e8e6af6571c51ca927387/dibajiw.pdfIn PDF document text
- http://www.ashtralmedia.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c5cc104a358---79957420169.pdfIn PDF document text
- https://nffcd.org/userfiles/files/74544371375.pdfIn PDF document text
- https://foodvellythailand.com/upload/files/noxuxi.pdfIn PDF document text
- http://skyrybupaslaugos.lt/uploads/files/2411957521.pdfIn PDF document text
- https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b2ad112b42---sumetup.pdfIn PDF document text
- https://www.treehousecare.org/wp-content/plugins/formcraft/file-upload/server/content/files/16081d7c7a9820---29469316782.pdfIn PDF document text
- https://www.alignerco.ca/wp-content/plugins/super-forms/uploads/php/files/4d406a022927640b7a9d71553a5fa97e/pixawefijalob.pdfIn PDF document text
- http://naturallabs.fr/userfiles/file/muzarexavilogitusomi.pdfIn PDF document text
- https://riverasphotovideo.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c77fa32a0e---bowomidenexazogupamatal.pdfIn PDF document text
- https://kisikana.hr/userfiles/file/wegavibadosevakexugalir.pdfIn PDF document text
- http://gospel-pour-100-voix.com/fichiers/newsletter/file/surijasuzupogo.pdfIn PDF document text
- http://www.circoloaletrium.it/wp-content/plugins/formcraft/file-upload/server/content/files/160b56d24eb443---7207606473.pdfIn PDF document text
- https://abofahed.com/userfiles/file/53351779792.pdfIn PDF document text
- https://webshopplus.nl/app/webroot/files/userfiles/files/dedarajapa.pdfIn PDF document text
- https://oriontradecom.com/ckfinder/userfiles/files/48730329103.pdfIn PDF document text
- https://leo-translate.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16096b58520900---51210693627.pdfIn PDF document text
- https://lawina-radom.pl/files/file/satifofidele.pdfIn PDF document text
- http://naturpix.ch/cmsimages/file/ladadukowebifodebudameg.pdfIn PDF document text
- http://m2mus.ca/clients/b/b1/b1ca46fdb12d68e762e4a8b3318caec0/File/rononenokej.pdfIn PDF document text
- http://beveragesgs.com/userfiles/file/xaxanazerab.pdfIn PDF document text
- http://phanphoiongnhuahoasen.vn/upload/files/mixewerumubozugirajotam.pdfIn PDF document text
- http://mediedil.eu/userfiles/files/27261124834.pdfIn PDF document text
- https://taichielite.com/louis/taichi/ckfinder/userfiles/files/23034140690.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=pdf+commenting+softwarePDF link annotation
- http://mustang.tom.ru/jsplugins/ckfinder/userfiles/files/wudekuvapogifux.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_off0000e635.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE635	17776 bytes
SHA-256: `bb4e31cf1daad06dd46766de0cbc6bdb5c8e11dbd39192927c706a9de1fd3fe6`
`font_01_sfnt_off0001141b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1141B	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00012c32.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12C32	10860 bytes
SHA-256: `ec0d3b3b92dced79d325c7fa7326fe1670e668b7c1bcc40cbf49f40caf4a5e24`

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