PDF malware analysis — malicious · b9520b4e03029bbe

MALICIOUS

PDF

74.3 KB Created: 2021-09-12 00:47:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: 096c584ebe9e72a171def5e6f96b5cbe SHA-1: 5c0cb0a4ae93a3d446c8c0b7877cb2932793806e SHA-256: b9520b4e03029bbe1d65cdc6108bc4db0e753e8290a47d1d9dd4ed4d58df4af2

102 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV. The file embeds a large number of external links characteristic of an SEO link farm and contains embedded JavaScript. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

Nyx PDF Classifier suspicious score 0.4750

Heuristics 5

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
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://laborke.ru/uplcv?utm_term=abc+song+download+mp4 PDF link annotation
- https://hotararicedo.ro/files/files/28972208020.pdfIn PDF document text
- http://cathyknightwaite.com/ckfinder/userfiles/files/sadivuvujelozosamuzi.pdfIn PDF document text
- https://kamionosnyelvlecke.hu/userfiles/file/18459371064.pdfIn PDF document text
- http://machi-tomo.xyz/js/ckfinder/userfiles/files/favumo.pdfIn PDF document text
- http://malovanesklomh.cz/images/file/32495699076.pdfIn PDF document text
- http://optimumnieruchomosci.pl/uploads/userfiles/files/40372837981.pdfIn PDF document text
- http://deaprogettazioni.it/userfiles/files/nixajux.pdfIn PDF document text
- https://fietenhaardenenkachels.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613a6b3367e4f---dezoxixipixilojivudor.pdfIn PDF document text
- https://afra24.com/basefile/afra24/files/39813648941.pdfIn PDF document text
- http://thedewakohchang.com/image/upload/File/isegu.pdfIn PDF document text
- https://learnrkb.jugalbandiresearch.com/ckfinder/userfiles/files/96498370852.pdfIn PDF document text
- http://fields-on-earth.com/images/blog/file/kikidumotutuxupo.pdfIn PDF document text
- http://hrjok.com/uploadfile/file/jamoxojapupimupenu.pdfIn PDF document text
- http://garagehayashi.com/js/upload/files/nolixanipujobemi.pdfIn PDF document text
- http://the100voicesofgospel.de/fichiers/newsletter/file/61945478278.pdfIn PDF document text
- https://pepinieramontana.ro/ckfinder/userfiles/files/libegovizirogigix.pdfIn PDF document text
- http://danieldesignpro.com/userfiles/76898242601.pdfIn PDF document text
- https://thietkeweblongan.com/upload/files/lavikuvuxiwugijevebivudo.pdfIn PDF document text
- http://aroma-es.site/yamituki-n/uploads/files/3938914526.pdfIn PDF document text
- https://itracmediav5.com/ckfinder/userfiles/files/41077394849.pdfIn PDF document text
- http://geoass.eu/userfiles/files/73991314146.pdfIn PDF document text
- http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612fe1387dd14---354431627.pdfIn PDF document text
- https://factorysales.com/userfiles/files/nazovabonuxu.pdfIn PDF document text
- http://kubablimel.pl/Image/files/98935599321.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_off0000ddb4.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xDDB4	16792 bytes
SHA-256: `9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1`
`font_01_sfnt_off0000f5c6.bin`	pdf-font-stream	PDF embedded font (sfnt) at offset 0xF5C6	18292 bytes
SHA-256: `3d6d387f751a89d2be60e67bbfac93e7189e60edb7f53d714579dea93ff80d92`

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