PDF malware analysis — malicious · 5c7e5bf9570b5d5f

MALICIOUS

PDF

66.4 KB Created: 2021-09-02 19:58:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11

MD5: ca80a535db86d4210969789662f44a7c SHA-1: 413304b054bd623235e5efa2b7f548ff22b9cbb9 SHA-256: 5c7e5bf9570b5d5f3d8a4c33eba357dfd8d5ad81746ca729a2cdc66433bf72d1

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file was detected as malicious by ClamAV and an ML classifier. It functions as a link farm, containing numerous URLs that point to compromised WordPress sites and disposable hosting. These links likely lead to phishing pages or further malware downloads, aligning with a spearphishing attachment attack pattern.

Machine Learning

Nyx PDF Classifier malicious score 0.5231

Heuristics 5

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
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://smidgel.ru/uplcv?utm_term=online+advertisement+management+system+project+pdf PDF link annotation
- http://faizleathergloves.com/userfiles/files/dufiluliwozizujosegilu.pdfIn PDF document text
- http://clinicacomciencia.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160a19df0cb55d---wirukari.pdfIn PDF document text
- https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1611904ebe8b44---15009755273.pdfIn PDF document text
- http://andreevmag.com/wp-content/plugins/super-forms/uploads/php/files/1fda76d5d77ccbd3ee4706804ad81bf2/vuvuxasoku.pdfIn PDF document text
- https://hanurichurch.org/ckfinder/userfiles/files/11391807952.pdfIn PDF document text
- http://www.maarsehoveniers.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160f55a35cccce---82098674326.pdfIn PDF document text
- https://antoinepanau.com/wp-content/plugins/super-forms/uploads/php/files/abbe3bb362dcb4f2cc88ef97880c09fa/27901712071.pdfIn PDF document text
- http://www.ausafrica.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16099667f50f0d---67711830280.pdfIn PDF document text
- http://lienming-rubber.com/uploads/files/202108190019186841.pdfIn PDF document text
- http://www.eflox.net/wp-content/plugins/formcraft/file-upload/server/content/files/160bf8d0fc56d8---57695439662.pdfIn PDF document text
- https://fobiy.net/wp-content/plugins/super-forms/uploads/php/files/a37043faf7202d151073b21a4b3cb3ea/47301873114.pdfIn PDF document text
- https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/7a361dcc44d96f8599bc631f505f3f70/lupefokibiwejedekiwuxami.pdfIn PDF document text
- http://loaamtran.com/files/usersfiles/files/vimik.pdfIn PDF document text
- http://miskolciharsona.hu/pictures/file/viwowida.pdfIn PDF document text
- http://allseasonsart.com/uploads/fck_uploads/file/59709764446.pdfIn PDF document text
- https://eminencesolutions.in/resources/userfiles/file/26378582725.pdfIn PDF document text
- http://test.uebersetzungen-nesselberger.de/wp-content/plugins/formcraft/file-upload/server/content/files/16087e3ce77fcc---bunulajirapejofelojativi.pdfIn PDF document text
- https://speeddating.lt/speeddating/ckfinder/userfiles/files/66027116846.pdfIn PDF document text
- https://www.popcaffe.it/wp-content/plugins/super-forms/uploads/php/files/d95b409e512345708f50e0eacd42ec0e/8373248216.pdfIn PDF document text
- http://krindustria.com.br/site/wp-content/plugins/formcraft/file-upload/server/content/files/1611a5f768a4be---zimopanodakobizupo.pdfIn PDF document text
- http://aatmicscience.org/asuserfiles/file/sasituzoxijamexunemu.pdfIn PDF document text
- https://www.frontierexim.com/wp-content/plugins/super-forms/uploads/php/files/4tecgvhhndili9ugtp1m5clegk/50911255314.pdfIn PDF document text
- https://oneremote.ru/wp-content/plugins/super-forms/uploads/php/files/fbb08c70c9e8ea9e301012e26da0030f/gipepugemedarakuv.pdfIn PDF document text
- http://dejavu.sourceforge.netIn PDF document text
- http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

Filename	Kind	Source	Size
`font_00_sfnt_off0000d571.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD571	11296 bytes
SHA-256: `3b86529616d7e7d0f2991ff5f13f54858812a72635ede8d1deb43f758851a305`
`font_01_sfnt_off0000efcc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEFCC	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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