PDF malware analysis — malicious · e92818366d9d7db6

MALICIOUS

PDF

101.5 KB Created: 2021-05-20 18:32:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: 950728b5a3ad60ed37339c000d88384d SHA-1: e3e374f2ff8d6c7c20914753aeb11ab909ef39de SHA-256: e92818366d9d7db648f071739bb376bc014382e65bd9ee40a1cb111e348a7eb8

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links to compromised WordPress sites, indicating a link farm designed to host and distribute malicious files. The ClamAV detection and ML classifier strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the structure and URL patterns are consistent with phishing campaigns that use compromised sites to host secondary payloads.

Machine Learning

Nyx PDF Classifier malicious score 0.8849

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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
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://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/1609d4cd5baf76---duginabefur.pdf In PDF document text
- https://www.andeanskyline.com/wp-content/plugins/formcraft/file-upload/server/content/files/16083432ed7756---37029704181.pdfIn PDF document text
- https://dezsredstvompx.ru/wp-content/plugins/super-forms/uploads/php/files/e419fde8bc2b575539c56f023b5a880d/danadaw.pdfIn PDF document text
- https://www.icslights.com/wp-content/plugins/super-forms/uploads/php/files/4809e861ecba43084511dba363b40586/21981719171.pdfIn PDF document text
- http://delawaretravelmedicine.com/wp-content/plugins/formcraft/file-upload/server/content/files/160798b0ef2f68---23211421117.pdfIn PDF document text
- https://globalazeri.az/wp-content/plugins/super-forms/uploads/php/files/ft6ma0s6pgfutia8692m8a7e22/24340510226.pdfIn PDF document text
- http://sciencevier.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608791ef9719d---momajupe.pdfIn PDF document text
- http://salonlomi.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a602dc4f199---ditufafeluzilosumifuwis.pdfIn PDF document text
- https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607cc1f19064b---98213023199.pdfIn PDF document text
- https://braviengenharia.com.br/wp-content/plugins/super-forms/uploads/php/files/3bf8hktj6tmmu099g6em395pvk/kevel.pdfIn PDF document text
- http://nuyewrecruitment.com/wp-content/plugins/super-forms/uploads/php/files/bdaba28de924de26ac15cd8c02ccee1b/rurasirerofutu.pdfIn PDF document text
- http://photographybynami.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609af28735292---muwavolesog.pdfIn PDF document text
- http://orgue-chantepie.info/FCKeditor/upload/file/51815742387.pdfIn PDF document text
- https://www.femregenx.co.za/wp-content/plugins/super-forms/uploads/php/files/0uq55k9aosogqskcclpiipddrg/mozuponabude.pdfIn PDF document text
- https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160758b6ca6795---buvevadawalobesu.pdfIn PDF document text
- https://mrmobilewebsite.agency/wp-content/plugins/super-forms/uploads/php/files/56d5e6119e9c13c37d75f9e27306bd7e/9888343391.pdfIn PDF document text
- http://cricalliance.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c4c4aae0c---puwebew.pdfIn PDF document text
- http://www.ascendercorp.com/In PDF document text
- http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/1KS0DP0cxss/uplcv?utm_term=%25D8%25B1%25D8%25A7%25D8%25A8%25D8%25B7+%25D9%2585%25D8%25A7%25D9%258A%25D9%2586+%25D9%2583%25D8%25B1%25D8%25A7%25D9%2581%25D8%25AA+%25D8%25A7%25D9%2584%25D8%25AC%25D9%2588%25D8%25A7%25D9%2584+%25D8%25A7%25D8%25AE%25D8%25B1+%25D8%25A7%25D8%25B5%25D8%25AF%25D8%25A7%25D8%25B1PDF link annotation
- http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off000153cd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x153CD	3396 bytes
SHA-256: `39b723426ba3d8c138591a08cf7ac57ce1af2078f96d7f7cb3d2ce0498b9dbc4`
`font_01_sfnt_off00015ed4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x15ED4	9760 bytes
SHA-256: `2015aac6f43b01364efdb42ef54db2fdb90603467c0bcdc7292808e8ad34f89d`

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