PDF malware analysis — malicious · 8f0dabb9b3341de1

MALICIOUS

PDF

76.4 KB Created: 2021-05-01 13:16:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-01

MD5: 3ab70df5dd6bb3bb5de0ff4bc5e49c82 SHA-1: 6d91fa659f2899469fe95c79e26c9701e2ef2dd8 SHA-256: 8f0dabb9b3341de13e45e616b5484b9db7d8dfb824d26369751d6fc4441f419b

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier malicious score 0.9998

Heuristics 6

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
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://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/160743d7662f97---35065543824.pdf In PDF document text
- https://krimgranit.ru/wp-content/plugins/super-forms/uploads/php/files/f3c4ca0dda498d91b33a276c5bef6515/52464846541.pdfIn PDF document text
- http://ankamet.com/userfiles/file/5860556906.pdfIn PDF document text
- https://ajitcoatings.com/uploads/90274847012.pdfIn PDF document text
- https://ontime-taxi.kg/wp-content/plugins/super-forms/uploads/php/files/0289006aee352422da62a8bd57199848/davodilagosupebekovepesos.pdfIn PDF document text
- https://www.finestkindcharter.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607884339402f---bosowivotexejiwi.pdfIn PDF document text
- https://psychotherapie-dr-albrecht.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca9928361f---92556858486.pdfIn PDF document text
- https://www.northwoodmedical.ca/wp-content/plugins/super-forms/uploads/php/files/pblnbdaus22hl63hnot9n1muk6/79343818870.pdfIn PDF document text
- https://www.charityweiss.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607c9459cfe48---14777893883.pdfIn PDF document text
- https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/40b511cf3bbac84c8d9c8286a536bed4/20812105969.pdfIn PDF document text
- http://www.dj-csnl.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16075b56d25755---8771793991.pdfIn PDF document text
- https://www.hamburgeriaagricola.com/wp-content/plugins/super-forms/uploads/php/files/gdubf3j4uj1sc567kuo9prgu33/39229645517.pdfIn PDF document text
- https://sidexsideaudio.com/wp-content/plugins/formcraft/file-upload/server/content/files/160847bc094c47---zifonoxikusegopowijafikis.pdfIn PDF document text
- https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1e340694d7b6c3592ff026cb6a5668e5/wiraxejuza.pdfIn PDF document text
- http://exactblue.com/wp-content/plugins/formcraft/file-upload/server/content/files/160759b92d473c---8999147660.pdfIn PDF document text
- http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/16078b4d630ea6---7714016973.pdfIn PDF document text
- https://apparel.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/35d9beaeb302ad63ba3a79b8706c53a9/xekob.pdfIn PDF document text
- https://www.spreefahrten-berlin.de/wp-content/plugins/super-forms/uploads/php/files/f5tcbsfgucr57roesfevlnrh9o/45720041498.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/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=motu+patlu+cartoon++mp4+newPDF 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000e11d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE11D	3208 bytes
SHA-256: `04d10eae330d6fd2b19f52a354cb1372c60a98a70346f7260b0acb1675351890`
`font_01_sfnt_off0000eca5.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xECA5	5088 bytes
SHA-256: `7d5bb78d3bf94be19878389b0350674982d050acc628a093ccdc1f0481bd9ccc`
`font_02_sfnt_off0000fdfd.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFDFD	11216 bytes
SHA-256: `3fbf1ddef0ce94f99e51c83e920883f0adde4c02e55b8dec705e434a154cfc68`

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