PDF malware analysis — malicious · c79a9937173e4a68

MALICIOUS

PDF

91.1 KB Created: 2021-08-19 13:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: 0066b38b090605533fa43c32d85e6e7a SHA-1: 97ad5f4266d8dcd4215966192cf60809959cf13a SHA-256: c79a9937173e4a68624950d0f9a22a5b17a4d9a690c42f53addb125e941c15bd

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links pointing to compromised WordPress sites and other domains, suggesting a phishing or malware distribution campaign. The PDF structure and embedded URLs are indicative of a technique used to redirect users to malicious content, potentially leveraging JavaScript for execution.

Machine Learning

Nyx PDF Classifier malicious score 0.9990

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://medvor.ru/uplcv?utm_term=uncitral+arbitration+rules+2018+pdf PDF link annotation
- https://www.sahabatkeluargahomecare.com/wp-content/plugins/formcraft/file-upload/server/content/files/160788248aef3f---6539702690.pdfIn PDF document text
- https://conrays.ru/f/data/86100636624.pdfIn PDF document text
- https://wpsqld.com.au/wp-content/plugins/super-forms/uploads/php/files/3a8375c92070b3dd9969fa924713a7b8/durifidul.pdfIn PDF document text
- http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a403271eea1---17910964082.pdfIn PDF document text
- https://dogathermalhotel.com/resimler/files/luwiruzuzokonazova.pdfIn PDF document text
- https://cape-electronics.com/media/file/bibof.pdfIn PDF document text
- http://dirabrealtors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f531891719---nujitudedorogavumejirov.pdfIn PDF document text
- https://dazzlin.co.uk/wp-content/plugins/super-forms/uploads/php/files/7304559de4bec8b7d242808ab2ab3cc7/34675812432.pdfIn PDF document text
- https://www.kalirich.com/wp-content/plugins/super-forms/uploads/php/files/u0oq4dmol6i2c3t09ahm4t4er1/koxebufuwukul.pdfIn PDF document text
- http://botosani.ro/img/uploads/file/57606996537.pdfIn PDF document text
- http://la-roofers.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/16090463278e51---vofapokulolatomijabuko.pdfIn PDF document text
- http://maduraigarlandshop.com/userfiles/file/73006404878.pdfIn PDF document text
- https://sambelteri.com/contents//files/36461011092.pdfIn PDF document text
- https://designcoordinators.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607a932774e89---ximenamusofew.pdfIn PDF document text
- https://limpjet.com.br/wp-content/plugins/super-forms/uploads/php/files/5b3364481e8c2f2b7b089c8bef3caa54/30234285021.pdfIn PDF document text
- http://sungsam.net/userData/board/file/61424129253.pdfIn PDF document text
- https://akproauto.com/nbloom/fckuploads/file/76898815968.pdfIn PDF document text
- http://ejmk.com/ej/upload/files/moparazib.pdfIn PDF document text
- http://entone.es/wp-content/plugins/super-forms/uploads/php/files/08a9068f4432f37a4f478841be96f0c0/potunetosopegibod.pdfIn PDF document text
- http://www.advancedevents.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a807d26d265---wigipaxujowoba.pdfIn PDF document text
- http://mesotects.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afb768146ef---25965863072.pdfIn PDF document text
- https://gtsonline.nl/wp-content/plugins/super-forms/uploads/php/files/pgmqpvujadct10f2fjb9n1fol0/pekefajixi.pdfIn PDF document text
- https://aartipalette.com/userfiles/file/82061616231.pdfIn PDF document text
- https://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/6fij250d9q5kq455sf110pt60o/tewepava.pdfIn PDF document text
- https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e97da809ba5---xatomuripatirapakile.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_off0000fea0.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFEA0	17356 bytes
SHA-256: `d96b9851fe0ec31370416ec947b73128bbef2f4914cc258c7f7311dbe09f0ce5`
`font_01_sfnt_off00012b56.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x12B56	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_02_sfnt_off0001436d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x1436D	11364 bytes
SHA-256: `aac686223bd1007d9c6ce049ad52fafd6846b80636a651f6e419b46563e291e4`

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