PDF malware analysis — malicious · 95ed2da101bffba8

MALICIOUS

PDF

74.1 KB Created: 2021-09-18 23:23:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: c2373a2fa636862f57a3a743dae88dde SHA-1: 0e3525a8b76cae8b91516bb8b998b41958bd7307 SHA-256: 95ed2da101bffba869833ffb53fd5f24fa206df22e9b1107a27d914974ffe372

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 User Execution: Malicious File

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection for Pdf.Phishing.Trojan. The file functions as a link farm, with numerous embedded URLs pointing to various domains, some of which are hosted on compromised CMS upload storage. The primary purpose appears to be directing users to external resources, likely for phishing or malware distribution.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

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 http://pferdefreunde-brueckenhof.de/sites/default/files/userfiles/file/36824114358.pdf In PDF document text
- http://www.insight-assessment.com/ckfinder/userfiles/files/8496866847.pdfIn PDF document text
- https://dubaimotorcycletours.dubaimotorhomerentals.com/uploaded_images/files/jutumovekekevov.pdfIn PDF document text
- https://nvsrolko.org/ckfinder/userfiles/files/53504772431.pdfIn PDF document text
- http://joy05.com/_UploadFile/Images/file/vowebutitoboboxifu.pdfIn PDF document text
- http://abwlargo.com/uploads/files/72752048277.pdfIn PDF document text
- https://workinhotel.com/upload/fckfile/memupodavanis.pdfIn PDF document text
- https://asoriofrio.org/ckfinder/userfiles/files/kusabofomelegukajudab.pdfIn PDF document text
- https://uzunlarpeynir.com/dursun/upload/files/82311976739.pdfIn PDF document text
- https://thanaclusterwestgate.leaddeehub.com/userfiles/files/veroruxitas.pdfIn PDF document text
- http://sjatupornservices.com/file_media/file_image/file/tiponunagataxawu.pdfIn PDF document text
- http://easy-sleep24.de/shop/images/editorfiles/file/vanupuruxararu.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16141fe6925ebe---tojuwexe.pdfIn PDF document text
- https://webmodeli.com/wp-content/plugins/formcraft/file-upload/server/content/files/161388bed64d21---tafumavewuzukenaba.pdfIn PDF document text
- http://biancoacolori.it/userfiles/files/fojazeginadabekawovimutiv.pdfIn PDF document text
- http://trendstyleimage.com/uploads/ckfinder/userfiles/files/kofuvufudigevupubazofed.pdfIn PDF document text
- http://linhkienhunganh.vn/luutru/files/87156856157.pdfIn PDF document text
- https://agrocare.ro/ckfinder/userfiles/files/jevanoxexefewonaximu.pdfIn PDF document text
- http://iccj.jp/images/uploads/fckeditor/file/87161316702.pdfIn PDF document text
- http://cobe-ing.it/userfiles/files/sigubafuje.pdfIn PDF document text
- http://nowyhotelik.pl/userfiles/file/pejorafujo.pdfIn PDF document text
- https://propbrains.com/wp-content/plugins/super-forms/uploads/php/files/6b64b7246d713adc481c0d289caa4af9/82289290403.pdfIn PDF document text
- https://areopag.ru/sites/default/files/uploads/lonok.pdfIn PDF document text
- http://augustaelectricalwork.com/editorData/file/86445083546.pdfIn PDF document text
- http://relaxzenter.com/uploads/files/42555268260.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=the+woman+in+black+123moviesPDF 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_off0000c016.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xC016	16216 bytes
SHA-256: `bc681d1a7a330a6d29892f3053a9222b1c0f4db698e175cf322c7955218c4c77`
`font_01_sfnt_off0000e98b.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE98B	10988 bytes
SHA-256: `afd2d30ec3aad9916153c5b49777c774f597ff2b8dd94b3f29ed41882589419b`
`font_02_sfnt_off00010308.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x10308	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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