PDF malware analysis — malicious · d2677faca3935248

MALICIOUS

PDF

85.0 KB Created: 2021-06-28 19:19:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14

MD5: edf07418e40aab68e58270b9ee86f3ca SHA-1: 3c578dc8f4d9ad3173cf702b4b69b643f01ad7f4 SHA-256: d2677faca393524851c138d7aef2c4e7e1c64a2e0f1a9d3ad0b4de6d810bb0b9

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous links pointing to websites that appear to be compromised CMS uploads, suggesting a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly indicate malicious intent. The document body is unreadable, but the heuristics and URLs are sufficient to determine the attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/16077fa57a55fe---20349919028.pdf In PDF document text
- http://ahs1968.com/clients/d/dc/dcea35c349c70fb55dca458fc6558ff6/File/kubunabuzipewanuxud.pdfIn PDF document text
- http://c2r-auto.com/uploadfiles/file/2021052605142273499.pdfIn PDF document text
- http://remont-etalon.ru/upload/files/39284552610.pdfIn PDF document text
- https://luyenthitoeic.info/userfiles/file/kefemikowiribip.pdfIn PDF document text
- http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160730377690ba---kokaxejatofelad.pdfIn PDF document text
- http://paillasse.hu/userfiles/file/zixavokidagujufuw.pdfIn PDF document text
- http://portsreunion2021.com/clients/b/b1/b1889431de095b9710a1303a3c619afc/File/62898557692.pdfIn PDF document text
- https://discoverapartmentsforrent.com/wp-content/plugins/super-forms/uploads/php/files/e2f4b720a3a64812f77929113f1be221/sudolakabolixemulajumev.pdfIn PDF document text
- http://www.lavalledesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba91cb3aaac---47269462057.pdfIn PDF document text
- https://editions-tlp.fr/ckfinder/userfiles/files/37325703425.pdfIn PDF document text
- http://traditionsradio.com/wp-content/plugins/super-forms/uploads/php/files/270fc6qg6r17qfeempivae4r06/32849068731.pdfIn PDF document text
- https://munord.com/wp-content/plugins/super-forms/uploads/php/files/989430807461711a9f5a5d12dceb9e73/donuke.pdfIn PDF document text
- https://viajespereira.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a042ebef5fe---91983506834.pdfIn PDF document text
- https://denizlihorozu.com/resimler/files/11197934019.pdfIn PDF document text
- http://czdashan.cn/uploadfile/file/2021051612455573499.pdfIn PDF document text
- http://lycee-elm.org/userfiles/file/92938096678.pdfIn PDF document text
- http://longarmacademy.net/fckeditor/userfiles/file/14026243844.pdfIn PDF document text
- http://101-games.ru/images/uploads/files/53715472386.pdfIn PDF document text
- http://hattrick-sports.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bbca2d83ad7---sorider.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b43af42f6c4---10931052947.pdfIn PDF document text
- https://www.truesdalepainting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607becd9cd3f4---dopowaginoboxod.pdfIn PDF document text
- https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/0dc2c63fce4d2d5b6b22ff8725f299a5/nuritowefuleg.pdfIn PDF document text
- http://www.sensible-seeds-premium.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b06e11288b4---tadinuzolorefibetugifuno.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=how+to+quote+in+chicago+stylePDF link annotation
- https://��www.scribbr.com/��citing-sources/��how-to-paraphrase/In 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_off0000e873.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE873	16940 bytes
SHA-256: `eba9692fa07b6a1ac7b012cb08aa6ce429ea7901d5aaccec251ca71f34faf039`
`font_01_sfnt_off0001143c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1143C	10848 bytes
SHA-256: `9a241b695b8ce57035e93203d44dbda83131d54d617ce3ea0d91e8f4f9120cf3`
`font_02_sfnt_off00012cf1.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12CF1	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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