PDF malware analysis — malicious · 6a82e3e5f2f8d25e

MALICIOUS

PDF

39.2 KB Created: 2021-09-23 16:51:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23

MD5: 57ec2b0bb546e13382a4b17aa7d79f01 SHA-1: 4fea7370e1d41f390f8ee98834d57c2c8504c35b SHA-256: 6a82e3e5f2f8d25e3c3ca1acc4ac964f987e8670a65af380d8b34a0ab6d4e96b

144 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF is identified as a phishing lure due to its image-only nature and embedded clickable link. The ClamAV detection and ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest it's designed to redirect users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.8883

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 39 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 http://henghuitong.com/jingkelun/userfiles/files/20210918103230.pdf In PDF document text
- http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614787ac8ba89---sufivaliwowazotegiwej.pdfIn PDF document text
- http://dentish.ru/ckfinder/userfiles/files/pofidazejitu.pdfIn PDF document text
- http://morebricks.com/ckfinder/userfiles/files/sugafenarubirodavisilola.pdfIn PDF document text
- http://www.alex-vasilkov.ru/images/wisdom/file/wogibusatemejukujo.pdfIn PDF document text
- https://sowlindia.com/userfiles/file/83198670641.pdfIn PDF document text
- http://cu-mbc.com/ckfinder/userfiles/files/1390501936.pdfIn PDF document text
- http://heathrowairporttaxi.website/userfiles/file/gigukanajibu.pdfIn PDF document text
- http://tecs4.com/intranet/ckfinder/userfiles/files/dinuditewupotugexa.pdfIn PDF document text
- https://nic-irq.com/userfiles/files/dovotumefebozuxe.pdfIn PDF document text
- https://wineart.online/userfiles/file/36792009303.pdfIn PDF document text
- http://gospel-pour-100-voix.com/fichiers/newsletter/file/9248938994.pdfIn PDF document text
- http://sirinthepgroup.com/userfiles/file/78143413476.pdfIn PDF document text
- http://fli.edu.mn/ckfinder/userfiles/files/73793334896.pdfIn PDF document text
- http://matsonconstruction.net/userfiles/file/39483913551.pdfIn PDF document text
- https://ngonluathan.vn/images/ckeditor/files/87583114067.pdfIn PDF document text
- http://metalzilemboeventi.com/userfiles/files/padezaregu.pdfIn PDF document text
- https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=how+to+connect+phone+to+pc+using+usb+cablePDF link annotation

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