PDF malware analysis — malicious · ff86a1dd64c5a9cd

MALICIOUS

PDF

86.0 KB Created: 2021-09-04 07:22:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-23

MD5: aacd52a7b5f12040b19ee55237ab5ef7 SHA-1: 930703426b587681d9fa4c9242990ac050a8f47e SHA-256: ff86a1dd64c5a9cd87535d0a191b785d1e0f79bf2982e5bcd7aaa6a1a0329524

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 WordPress upload directories, suggesting a phishing or redirection scheme. The ML classifier and ClamAV detection strongly indicate malicious intent, likely to lure users to malicious sites. The file's structure as a link farm is a common tactic for distributing malware or conducting phishing campaigns.

Machine Learning

Nyx PDF Classifier malicious score 0.9961

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://txextremecarts.com/userfiles/file/wanofexozuvunopivegape.pdf In PDF document text
- https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/2502d80211269217fd8b9f112f3d8ce5/kununikoda.pdfIn PDF document text
- http://bygreenpure.com/userfiles/file/kadisigamafim.pdfIn PDF document text
- https://ancoraeducacion.com/images/19556665440.pdfIn PDF document text
- http://sartoriaventurini.com/userfiles/files/wurasopitaxirono.pdfIn PDF document text
- http://a-pluset.com/userfiles/3763812536.pdfIn PDF document text
- http://www.belladermeestetica.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16086c53367c05---lunojene.pdfIn PDF document text
- http://www.majoriscambio.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16080742b8e0ff---30672974713.pdfIn PDF document text
- https://wasserentkalkung.at/ckfinder/userfiles/files/zorivomokerefewawanerenex.pdfIn PDF document text
- http://savitapiti.org/ckfinder/userfiles/files/34378978687.pdfIn PDF document text
- http://highgaincomposites.com/img/file/20218111420.pdfIn PDF document text
- https://hylyt.co/wp-content/plugins/super-forms/uploads/php/files/8b54d0990b1248f41bb16ce267e7706e/81415754077.pdfIn PDF document text
- https://papersacksfactory.ae/images/bulk_images/files/dusasitodaduzeta.pdfIn PDF document text
- http://multiseal.com.ph/wp-content/plugins/formcraft/file-upload/server/content/files/161175a072db15---xozejebefozitubudebapito.pdfIn PDF document text
- https://cottingham-group.com/cufiles/files/sovidofefatis.pdfIn PDF document text
- http://obrienbuilders.com/userfiles/file/13896219523.pdfIn PDF document text
- http://carolinaboatclub.com/userfiles/file/mibezugolix.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/5fe56fedd17682080598af246e7310ee/gadomufaxage.pdfIn PDF document text
- https://sabagdasarov.ru/upload/file/makubafidif.pdfIn PDF document text
- https://doctmcooper.com/userfiles/files/fawufidevukib.pdfIn PDF document text
- http://consorzio-csa.it/userfiles/files/wogivij.pdfIn PDF document text
- https://jkmart.net/FCKFiles/File/91473125398.pdfIn PDF document text
- http://liveranigioielli.it/userfiles/files/71986436332.pdfIn PDF document text
- http://www.everhouse.lt/wp-content/plugins/formcraft/file-upload/server/content/files/1609fcde899a27---jobijazaworuzewilofefo.pdfIn PDF document text
- http://shrlie.com/upload_fck/file/2021-8-30/20210830053217980686.pdfIn PDF document text
- https://ever-progress.com/upload/files/43008732942.pdfIn PDF document text
- https://feedproxy.google.com/~r/Uplcv/~3/FevRqgeaUVY/uplcv?utm_term=ji+packer+knowing+god+pdf+freePDF 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_off0000ec96.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEC96	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off000104ad.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104AD	10652 bytes
SHA-256: `e3d3acd3f6208d96fcdfa31b7e68bf8b598e32f888a43c25732813deee871543`
`font_02_sfnt_off00011d04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D04	17844 bytes
SHA-256: `2c885ca071610915ecb37f046e2799fd5cf22c0362cc7f0cf9603d7a150a5e82`

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