PDF malware analysis — malicious · 9cb9ed25721a55d5

MALICIOUS

PDF

85.1 KB Created: 2021-07-14 01:37:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: a663d5893475329932654f651b16b41c SHA-1: 77f502a8e8ec269f97446237d6f493efbb6fccb6 SHA-256: 9cb9ed25721a55d5895adec95b47d0a5d71f5f6fc174612b0eec5f85a9e15afe

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was flagged by multiple heuristics and a machine learning classifier as malicious, with ClamAV identifying it as a phishing trojan. The document contains numerous links to external websites, many hosted on compromised WordPress sites or disposable domains, suggesting it functions as a link farm to distribute malicious content or conduct phishing. No scripts were extracted, but the structure and URL patterns indicate a lure for users to visit potentially harmful sites.

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://laborke.ru/uplcv?utm_term=all+the+places+you+can+get+pierced PDF link annotation
- http://ksnjl.com/userfiles/files/23428990233.pdfIn PDF document text
- http://greenbiotech.vn/uploads/userfiles/file/wumozobovovo.pdfIn PDF document text
- http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a3cfd46148---fanuzazonop.pdfIn PDF document text
- https://www.coconutlodge.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c2ff8734c14---selanaxare.pdfIn PDF document text
- http://foto-klub.dk/userfiles/file/60105162384.pdfIn PDF document text
- http://accomplishtheimpossible.com/userfiles_ati/file/fosexoxusawot.pdfIn PDF document text
- http://fantasypartyentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083b48653506---41514734760.pdfIn PDF document text
- http://architettodrabeni.it/userfiles/files/40015604561.pdfIn PDF document text
- https://digidatadecolombia.com/wp-content/plugins/super-forms/uploads/php/files/e9616cb1e49c8c733ea60cd28b2e3fc6/xedenolerogorasajelagobu.pdfIn PDF document text
- http://lamarchesainterita.be/lamarchesainterita/imgdb/news/files/86172987591.pdfIn PDF document text
- https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/63prj4rbpcmehl76d0cnvccelm/gizuwapurururuxojomitados.pdfIn PDF document text
- https://revapackers.com/wp-content/plugins/super-forms/uploads/php/files/5d1mhv4o3vtvbhr074ln3ava1d/vizowogawukabaxavovo.pdfIn PDF document text
- https://curryleafharleysvillepa.com/hang/userfiles/files/soroxidalemisipuwelibex.pdfIn PDF document text
- https://pluviaterra.mx/wp-content/plugins/super-forms/uploads/php/files/669fc9681d7bbda6ca55d05e2f896a1b/96914151343.pdfIn PDF document text
- https://mudateconmigo.cl/wp-content/plugins/super-forms/uploads/php/files/db958bf6aa444f8c5e5202cb3c2ffffd/74128205422.pdfIn PDF document text
- http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606cc2df05c6c---dapudokaxugavowegezug.pdfIn PDF document text
- https://yssnewlessons.org/UserFilesTwo/file/38150656611.pdfIn PDF document text
- http://takeacode.net/user/d41d8cd98f00b204e9800998ecf8427e/file/bidezej.pdfIn PDF document text
- https://gearforfree.com/wp-content/plugins/super-forms/uploads/php/files/pt6b9q3ncq0tbusvte9ne9gq5n/lazafo.pdfIn PDF document text
- https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e6a1474757e---54047415640.pdfIn PDF document text
- https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/4affd91f3ac2ca081510d1ea6f73a412/xuzegegotetatewejaj.pdfIn PDF document text
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/c3e3a627a0e10036c8e72d16a3a9d68d/fokoletofuxi.pdfIn PDF document text
- http://www.acefence.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608574ff4680d---nezubu.pdfIn PDF document text
- https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8e53776945---gerisuronizamopekagemobe.pdfIn PDF document text
- http://high-keenltd.com/userfiles/file/94402630442.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_off0000eb9c.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB9C	10988 bytes
SHA-256: `c9f37f473983752e1d4864d199d514808ac7b9487fa34e6ac6af2775922e5752`
`font_01_sfnt_off000104f2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x104F2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off00011d04.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x11D04	16380 bytes
SHA-256: `b213a1376b8bd429477aaf0c4212a19035f2328ebce61f4fd18b1d8eda45f2ca`

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