PDF malware analysis — malicious · 1f62166cfd4acb98

MALICIOUS

PDF

70.5 KB Created: 2021-09-18 18:15:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26

MD5: d618e64744f3b469c88c9e46554ca2e2 SHA-1: 53385a25febb146c4ed276d9a9fa2572b35dcdc6 SHA-256: 1f62166cfd4acb98c9d104ed79af4583a12ab1a4c9b07cc600b7ba9876b71262

134 Risk Score

Malware Insights

MITRE ATT&CK

T1059.007 JavaScript T1566.001 Spearphishing Attachment

The file was detected as malicious by ClamAV and an ML classifier, and contains embedded JavaScript. The presence of numerous external URIs, many hosted on disposable domains, suggests a phishing or malware distribution scheme. The embedded JavaScript likely facilitates the redirection to these malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.9947

Heuristics 6

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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 https://catamma.ru/uplcv?utm_term=dsi+emulator+android PDF link annotation
- http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/4d3ec3c0d9ff1338956a13e22934079a/kumumumixifilulupug.pdfIn PDF document text
- http://manegedebuitenwijck.nl/uploads/file/dofajoda.pdfIn PDF document text
- https://powerliteaac.com/userfiles/file/nidaxixibapeku.pdfIn PDF document text
- http://graylegalservices.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/jamebemozoxemadixesamunud.pdfIn PDF document text
- https://babetravelling.com/ckfinder/userfiles2/files/zuliletebedalamib.pdfIn PDF document text
- http://vestmorecapital.com/images/epost/38754290364.pdfIn PDF document text
- https://orderpoet.com/ckfinder/userfiles/files/29550591501.pdfIn PDF document text
- https://skywaytravelandholidays.com/ckfinder/userfiles/files/66039665923.pdfIn PDF document text
- http://marthomaiticherukole.com/userfiles/file/81144909877.pdfIn PDF document text
- https://nycsmindia.org/ckfinder/userfiles/files/jizis.pdfIn PDF document text
- http://tk-weld.com/images/library/File/sutomegoj.pdfIn PDF document text
- https://leuphuotcamap.com/uploads/image/files/87249417210.pdfIn PDF document text
- https://4wheelchile.cl/admin/uploads/file/36990227832.pdfIn PDF document text
- http://glamour-nsk.ru/ckfinder/userfiles/files/95194326254.pdfIn PDF document text
- http://cellfruits.com/ckfinder/userfiles/files/98310446613.pdfIn PDF document text
- http://kahasat.cz/data/file/kevipuvemo.pdfIn PDF document text
- http://posekatzahradu.cz/files/file/13433671227.pdfIn PDF document text
- http://to-kajihan.net/js/upload/files/94204209820.pdfIn PDF document text
- http://yuanyoujie.vip/userfiles/file/kifesiba.pdfIn PDF document text
- https://kapefashion.com/files/files/mimav.pdfIn PDF document text
- http://eugensa.lt/app/webroot/uploads/userfiles/files/xelisegukudododa.pdfIn PDF document text
- http://primaria-ciocirlia.ro/media/file/40639580432.pdfIn PDF document text
- http://www.jindatunnel.com/up_files/file/45858656815.pdfIn PDF document text
- http://kanoonkaraj.ir/dbmanager/filebank/htmlgallery/file///26557032238.pdfIn PDF document text
- http://pepinieres-soupe.com/userfiles/file/576657926.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_off0000b31d.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xB31D	16232 bytes
SHA-256: `52a935ae56ef26b90c0096a99cd71d2af40401dea950d0012ff69aaf2f838244`
`font_01_sfnt_off0000dcaa.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDCAA	10508 bytes
SHA-256: `72cc9d1a2c3d08df2c55486f9b1e72c66dfcd2c5428809c784784efb7858a098`
`font_02_sfnt_off0000f48f.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF48F	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`

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