PDF malware analysis — malicious · 0a522071e7b77382

MALICIOUS

PDF

70.6 KB Created: 2021-09-05 05:26:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16

MD5: 081e49c13db88b23639ded50d476c321 SHA-1: d13e9622625f1400e381fb5c559e9794c753a908 SHA-256: 0a522071e7b77382882e08150aad4fb1c596b22abde1bde6ec956c364a18f9ef

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The file is identified as malicious by ClamAV and exhibits characteristics of a link farm, directing users to multiple compromised websites. These sites host further PDF files, suggesting a multi-stage attack designed to distribute malicious content or phish for information. The presence of embedded URLs and the structure of the PDF indicate an attempt to lure users to external, untrusted resources.

Machine Learning

Nyx PDF Classifier suspicious score 0.4393

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://toskov-yordanov.com/userfiles/file/95684992468.pdf In PDF document text
- http://giasuminhtam.com/Images_upload/files/nubadevuvamatot.pdfIn PDF document text
- http://fashioncenterpoint.com/wp-content/plugins/super-forms/uploads/php/files/15a3f47d78f736bcecfb4ae627d9bdaf/31596052833.pdfIn PDF document text
- https://fjordancv.info/wp-content/plugins/super-forms/uploads/php/files/f067e885619f019fef14709550d534ef/tudatuzabufusevodakag.pdfIn PDF document text
- https://mycocoa.org/images/upload/files/xufotoviwidi.pdfIn PDF document text
- https://stef-nancy.fr/upload/document/94791616982.pdfIn PDF document text
- http://www.champcaregivers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607df703dabdd---temunomuwibugiritufugaz.pdfIn PDF document text
- https://retake.dk/ckfinder/userfiles/files/99550791375.pdfIn PDF document text
- https://bentzendesign.se/wp-content/plugins/formcraft/file-upload/server/content/files/1609cf344acfbf---dimevesamilowulelidatep.pdfIn PDF document text
- https://laxmigrouppune.com/wp-content/plugins/super-forms/uploads/php/files/fbab41abf935516abf2e54038a1b61f5/vuresa.pdfIn PDF document text
- http://mopron.ru/upload/files/33998332322.pdfIn PDF document text
- http://www.hollyskauaicondo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be0dff71b56---1731688487.pdfIn PDF document text
- http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1609d7c885c92d---49422180037.pdfIn PDF document text
- http://ilovegabal.net/fckeditor/_upload/file/jolixowanor.pdfIn PDF document text
- http://jiehuist.com/userfiles/files/6339462777.pdfIn PDF document text
- https://qqhanoman.com/contents//files/85002395378.pdfIn PDF document text
- http://manu-transport.com/documents/file/5271369497.pdfIn PDF document text
- http://kpghomerepairs.com/uploads/image/files/86012523059.pdfIn PDF document text
- http://www.tecnobor.com/ckfinder/userfiles/files/8910043961.pdfIn PDF document text
- https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c75cfa36d9f---nakad.pdfIn PDF document text
- https://textosolutionslinguistiques.ca/upload/editor/file/ralemimukipepasamegireze.pdfIn PDF document text
- http://atol-res.pl/uploads/file/raxozugexuzafaxugexolij.pdfIn PDF document text
- https://brtim.com/uploads/wysiwyg/files/zikuniliwivosudetixujesom.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/Om9ozkHLxGw/uplcv?utm_term=vb.net+add+image+to+pdf+filePDF link annotation
- 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_off0000d35a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xD35A	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000eb71.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xEB71	10748 bytes
SHA-256: `c169506ee7464db8a4743fa8ed4371a02ff69ea2e48552be2ba675d6ce92c2df`

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