PDF malware analysis — malicious · eae99bc2417dc003

MALICIOUS

PDF

76.0 KB Created: 2021-08-23 09:47:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 2a9a600c961b059155f0ad9337b3df77 SHA-1: d62227b79831b730964e86937c537e176ac279bf SHA-256: eae99bc2417dc003b878afabcd31e9f7c32537d31e911c4af3b2ddfee5f2a72e

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a link farm pointing to numerous compromised websites, many of which host other PDF files. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The primary attack pattern involves directing users to external, compromised resources.

Machine Learning

Nyx PDF Classifier malicious score 0.9939

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://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/f8e81bbce6ab24466a8654fee3902783/87381251451.pdf In PDF document text
- https://deconkhoemanh.com/wp-content/plugins/super-forms/uploads/php/files/oago98hempbf29dh82g2a9v2mo/tijoleferafaworina.pdfIn PDF document text
- http://maduraigarlandshop.com/userfiles/file/69667091104.pdfIn PDF document text
- https://kantankacreative.com/wp-content/plugins/super-forms/uploads/php/files/6243d854f6c0c6d4c642600a528f68b0/dekajokijovofofode.pdfIn PDF document text
- http://planetamama.ru/files/file/binerawiwadiz.pdfIn PDF document text
- http://www.zav-mito.si/wp-content/plugins/formcraft/file-upload/server/content/files/160a9534800924---gefifizo.pdfIn PDF document text
- http://lacasedescaraibes.fr/file/98561376128.pdfIn PDF document text
- https://stagerightstaging.com/wp-content/plugins/super-forms/uploads/php/files/8a032e0cbc43b992efa05428a5fe3ec6/foxowoxeketigozelo.pdfIn PDF document text
- https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/53a62d5b2ec8b01c20c8f9bf4e8d70d1/vedoroxudix.pdfIn PDF document text
- http://donaldbermanmaimonidesgolf2021.com/clients/0/0d/0d43fbb8ff91cab41fa1b056c0d912a9/File/91513640802.pdfIn PDF document text
- http://hkwwta.org/userfiles/lelosigino.pdfIn PDF document text
- http://naturabliskociebie.pl/userfiles/file/pinupetiwosuwisipe.pdfIn PDF document text
- https://kachhiproperties.com/wp-content/plugins/super-forms/uploads/php/files/8mdjkrfhcpiads3tthpo1d27b6/vowegu.pdfIn PDF document text
- https://www.denisonlandscaping.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607695b794873---15293718037.pdfIn PDF document text
- http://drinkandshrink.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16080162401bf4---zutagobufujok.pdfIn PDF document text
- https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4f4eb1617---12772967881.pdfIn PDF document text
- https://sanidom.pl/img/file/85069621754.pdfIn PDF document text
- https://www.drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/160b2e01500942---59054786339.pdfIn PDF document text
- http://cascad-trans.ru/files/40584702584.pdfIn PDF document text
- http://bestforfishing.com/wp-content/plugins/super-forms/uploads/php/files/0c7c816d03e6dd4532c9064c68665921/94855187352.pdfIn PDF document text
- http://pvsystreports.com/wp-content/plugins/super-forms/uploads/php/files/ier4hn8fbps5nd7i5fq2qopfv0/52084837126.pdfIn PDF document text
- https://www.arc-welding.co.uk/wp-content/plugins/super-forms/uploads/php/files/qcptrtj9v2534k1e7hit8fjju3/77707958054.pdfIn PDF document text
- http://alpanelektrik.com/depo/sayfaresim/file/ruvemedilusiwix.pdfIn PDF document text
- http://yejida.com/userfiles/file/zidufogafosagukomafa.pdfIn PDF document text
- https://birudongker.com/contents//files/rizubinivexami.pdfIn PDF document text
- https://pilotcenter.gr/wp-content/plugins/super-forms/uploads/php/files/7hutlijgt9nqhbt12t6qetktd9/basewomararetenaru.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1xuhb7AK25c/uplcv?utm_term=the+forgotten+circusPDF 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_off0000c54f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC54F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000dd66.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDD66	10468 bytes
SHA-256: `d9564b7aab8c09e791988d55f0ca6fbfa35bf6c9aeb6d426fe5d27579a102700`
`font_02_sfnt_off0000f52a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF52A	17672 bytes
SHA-256: `b3e7c5ee9ce0f234a8c5547d2bece9f8fcc1ec19bd7cfc266012e623025bea58`

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