PDF malware analysis — malicious · 96066ebaa6934098

MALICIOUS

PDF

73.9 KB Created: 2021-09-20 00:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 9db15ad3320db1b28436714b71511ccc SHA-1: 0831950743e0109f29ec9f1f88ac428ce2f92a50 SHA-256: 96066ebaa693409863e9845a806ba520195ef0ac975284e884c485580e7d4582

156 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which are hosted on compromised or disposable domains, suggesting a link farm or phishing operation. The presence of a ClamAV detection for 'Pdf.Phishing.Trojan' and ML classification further supports malicious intent. The document body is heavily obfuscated, but the heuristic firings indicate a pattern of directing users to potentially malicious URLs, likely for malware distribution or credential harvesting.

Machine Learning

Nyx PDF Classifier malicious score 0.9840

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://crysiq.ru/uplcv?utm_term=download+apk+minecraft+latest+version PDF link annotation
- http://budgettranslation.hu/sites/default/files/file/31746760016.pdfIn PDF document text
- http://stimatacasa.eu/userfiles/files/wotujuxafubigub.pdfIn PDF document text
- http://novehorizonty.sk/userfiles/file/lujelorag.pdfIn PDF document text
- https://bodegoncriollo.com/userfiles/file/65136543613.pdfIn PDF document text
- http://lecieldesandes.fr/ckfinder/userfiles/files/11096064019.pdfIn PDF document text
- https://haps.company/wp-content/plugins/super-forms/uploads/php/files/79a81bfe35542e7fcb40a51bdbe76fc8/11066108930.pdfIn PDF document text
- https://italvaping.com/file/76456172356.pdfIn PDF document text
- http://makassitools.com/userfiles/file///negenowifilujeta.pdfIn PDF document text
- http://netart.hu/userfiles/file/51675374389.pdfIn PDF document text
- http://swissies.lt/ckfinder/userfiles/files/famazifupenijofof.pdfIn PDF document text
- https://glosunspa.com/wp-content/plugins/formcraft/file-upload/server/content/files/161428c48bc397---gigaxomesewofojosu.pdfIn PDF document text
- http://acetuitioncentre.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1613096ed7de63---91395736332.pdfIn PDF document text
- http://ideatity.com/ckfinder/userfiles/files/zosebarukupasojozuv.pdfIn PDF document text
- http://forepic.com/_UploadFile/Images/file/tesikurudazime.pdfIn PDF document text
- http://eastindiaspray.com/suvra/eastindia_spray/files/masokubevoxi.pdfIn PDF document text
- https://fulzugaskozpont.hu/files/42800940505.pdfIn PDF document text
- http://www.tramag.pl/upload/file/84796153957.pdfIn PDF document text
- http://andlupa.com/userfiles/file/nuxaxowobape.pdfIn PDF document text
- https://leganordavigliana.com/uploads/file/26601361092.pdfIn PDF document text
- https://christembassybarking.org/wp-content/plugins/super-forms/uploads/php/files/9d5a10240534c0b6a5721e7bb5db2ba0/94263425555.pdfIn PDF document text
- https://datawire.gr/files/files/xofoluzoruw.pdfIn PDF document text
- https://shoppe.everybodyisnotdoingit.org/gift/userfiles/files/96914407333.pdfIn PDF document text
- https://aathichudi.org/userfiles/file/35018106585.pdfIn PDF document text
- https://bruceautoservice.com/files/file/3327360742.pdfIn PDF document text
- https://ou-ravda.com/ckfinder/userfiles/files/67914929871.pdfIn PDF document text
- http://cartonwrappingmachine.com/userfiles/file/tugebimejodovu.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_off0000bed2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xBED2	16124 bytes
SHA-256: `5e0132ec3ca27ce37c22ec3c4c029468569d94d6533c290bc35a441f0118568e`
`font_01_sfnt_off0000e80a.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xE80A	11028 bytes
SHA-256: `65e771cc9e66ca90524989c607ca3ba70ff35279988e98200eb95094b37c0666`
`font_02_sfnt_off000101b2.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0x101B2	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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