PDF malware analysis — malicious · 6adfb35b5b6bdd44

MALICIOUS

PDF

38.7 KB Created: 2021-09-12 03:13:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05

MD5: f5434fe4c5fd9a0d399721b2d27f93fd SHA-1: 00b7923ffacfae44e7a769296a8b881f33ffb9b8 SHA-256: 6adfb35b5b6bdd44babd696d2dd45c28ad8b4aae742b20897fac05a9103121d2

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its small size and image-heavy content, typical of a screenshot designed to hide clickable elements. The presence of numerous external URIs, many pointing to potentially disposable domains, further supports this. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.8588

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
Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE

PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 38 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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://www.tratedu.net/ssss2018/assets/143ad273/ckfinder/core/connector/php/upload/userfiles/files/aa4f8e9afdf3f65f744f2ada41192045.pdf In PDF document text
- https://woft-dining.com/webroot/editor-uploads/files/jiragusugunoxedux.pdfIn PDF document text
- https://www.pirkitpadangas.lt/ckfinder/userfiles/files/joguresif.pdfIn PDF document text
- http://norilskgu.ru/userfiles/file/21327033414.pdfIn PDF document text
- http://draftingfloorplan.com/ckfinder/userfiles/files/62128869640.pdfIn PDF document text
- http://www.itbaloch.com/wp-content/plugins/formcraft/file-upload/server/content/files/161376a170cdbd---96642529746.pdfIn PDF document text
- http://haciogullari.com/depo/sayfaresim/file/44513944295.pdfIn PDF document text
- http://biomehl.com/images/content/files/nuxamuvufunujivikoze.pdfIn PDF document text
- https://papiratisk.cz/soubory/78745535161.pdfIn PDF document text
- http://richmore.kr/uploadfile/fckeditor/file/jubifamutodefuwu.pdfIn PDF document text
- http://lhdrum.com/User_File/UpFile/file/20210908224923_YnVzb3Rpbmlsb3dva2lrYXZpbg==.pdfIn PDF document text
- http://sherwoodchambergolf.com/ckfinder/userfiles/files/19292836007.pdfIn PDF document text
- http://elfuklid.cz/foto/Image/file/xufolepiruwagebub.pdfIn PDF document text
- http://www.garriagricola.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f79fb4c7ca---80556064939.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=average+of+rate+of+changePDF link annotation

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