PDF malware analysis — malicious · d80d993e0f860127

MALICIOUS

PDF

71.9 KB Created: 2021-09-11 11:38:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14

MD5: 6dba338270d266bd3e50007c181960f2 SHA-1: 4c75e393e4bcd96cb7533204cc92f61aae320616 SHA-256: d80d993e0f8601277dcb41ca90afd1babec9e29be6c6e390c0ac68b0fdb8bd9b

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, with a high ML classifier score and ClamAV detection indicating malicious intent. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' suggests the PDF is part of a link farm designed to redirect users, likely to a phishing site or to download further malicious content. The embedded JavaScript is likely responsible for initiating the redirection or exploit.

Machine Learning

Nyx PDF Classifier malicious score 0.9951

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
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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://headlinesdinerla.com/uploads/files/11538095783.pdf In PDF document text
- https://pasationtravellers.com/root/FCKeditor/file/60146815078.pdfIn PDF document text
- http://marcth.pl/media/fck/file/tusibubekig.pdfIn PDF document text
- https://vontobel.shopbyeberli.ch/userfiles/files/lafimasepe.pdfIn PDF document text
- https://www.fibertech1.com/my_content/js/ckfinder/userfiles/files/94835470024.pdfIn PDF document text
- http://eis-pieschel.de/UserFiles/File/xegumodasulume.pdfIn PDF document text
- https://dehaventransportation.com/home/de/public_html/ckfinder/userfiles/files/dezupax.pdfIn PDF document text
- http://architettorobertafasola.eu/userfiles/files/voluzu.pdfIn PDF document text
- https://tcremich.lu/files/files/punavolinix.pdfIn PDF document text
- https://safetypadlocks.eu/eurostyl/photos/file/7630492733.pdfIn PDF document text
- http://vesimport.ru/userfiles/file/ranarir.pdfIn PDF document text
- http://alituncer.net/userfiles/file/xafiwitegal.pdfIn PDF document text
- http://thankschicken.com/uploads/files/xakevomado.pdfIn PDF document text
- http://yourbuilding.ru/userfiles/files/23029207056.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/763ba099b8ab48e631b26d1e4cbb729f/24357681836.pdfIn PDF document text
- https://nk-sostanj.si/files/file/pinejalitegoloxagajalade.pdfIn PDF document text
- http://siamsankyo.com/Uploads/file/kafedenetebat.pdfIn PDF document text
- http://gdwtechnology.com/fckeditor/file/kajafapowedogafifum.pdfIn PDF document text
- https://textolinguisticsolutions.com/upload/editor/file/pijelidugidu.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/1613a2eb7f101e---39114186894.pdfIn PDF document text
- http://jdjcnc.com/upfolder/e/files/20210911113613.pdfIn PDF document text
- https://bravo-hk.com/userfiles/file/21987292727.pdfIn PDF document text
- https://eletvital.hu/uploads/files/26590899317.pdfIn PDF document text
- https://menu2uplus.com/images/file/97668356875.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/1KS0DP0cxss/uplcv?utm_term=galaxy+sensors+appPDF 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_off0000b7e8.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB7E8	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000cffa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xCFFA	16540 bytes
SHA-256: `5294fa944183cbdc335c191477b89a91a65a8850a5dc90ec3a43462a9732b3dd`
`font_02_sfnt_off0000fadc.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xFADC	10308 bytes
SHA-256: `b2b6ac03b47819d5b632a60de21e1dd21c390890719b3b220ed7eeec35a3fa28`

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