PDF malware analysis — malicious · ec89848a97afc243

MALICIOUS

PDF

43.2 KB Created: 2021-09-23 22:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 2f6e87bbc33d168849b1409c82f18e50 SHA-1: f6f1839baec055b14e09b6b6558918e67d442a3b SHA-256: ec89848a97afc243eb1a6da92107fb5b461976adf40c37a3b8475fdd8424142b

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF file was detected as malicious by ClamAV and an ML classifier. It contains a link farm with numerous URLs, many hosted on compromised WordPress sites and disposable domains, suggesting an attempt to redirect users to download potentially unwanted or malicious software, such as VPN APKs. The presence of multiple links and the use of compromised infrastructure indicate a phishing or malware distribution attempt.

Machine Learning

Nyx PDF Classifier malicious score 0.6852

Heuristics 5

ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM

PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
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://queure.ru/uplcv?utm_term=xy+vpn+mod+apk+download PDF link annotation
- https://moveo-sport.pl/userfiles/file/9887193290.pdfIn PDF document text
- http://www.ondebiz.com/userfiles/file/28522118633.pdfIn PDF document text
- http://webmba.fr/client/logo/file/51539169186.pdfIn PDF document text
- https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/9mml4aj3m7dba7ppoev2ll2k70/zipaj.pdfIn PDF document text
- https://merohamro.com/ckfinder/userfiles/files/bovakobemotur.pdfIn PDF document text
- https://kakvkusno26.ru/wp-content/plugins/super-forms/uploads/php/files/05c849c4983170a8dda8449e6589579b/87961430075.pdfIn PDF document text
- http://thebankcardservice.com/uploads/files/38963689205.pdfIn PDF document text
- http://prime42.ru/userfiles/files/vevim.pdfIn PDF document text
- http://gsnursing.in/ckeditor/ckfinder/userfiles/files/kofarotavurufifaxut.pdfIn PDF document text
- http://toyotarent.hk/FileData/ckfinder/files/20210903_0DABFC0FE234B4A4.pdfIn PDF document text
- https://kp-bs.ru/upload/files/jaduzufoxeruzaxel.pdfIn PDF document text
- https://purefeeling8.com/data/file/21796574409.pdfIn PDF document text
- http://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/161451eeb03d95---58638905747.pdfIn PDF document text

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