PDF malware analysis — malicious · 49af6f0b89b7e21e

MALICIOUS

PDF

37.2 KB Created: 2021-06-24 16:55:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14

MD5: b5ff1db20455d8596eea9387acf19948 SHA-1: 3ef05e2597c059e215e9a12e2565db855c3fa215 SHA-256: 49af6f0b89b7e21e9781ce8458b2af052aeed20caa793b12fadc9dc8b267f4c8

174 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

This PDF document is identified as a phishing lure due to its small size and image-only content, designed to trick users into clicking embedded links. The numerous external URLs point to compromised CMS uploads and disposable hosting, suggesting a campaign to distribute malicious content or redirect users to phishing sites. ClamAV detection further confirms its malicious nature.

Machine Learning

Nyx PDF Classifier malicious score 0.5704

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
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 37 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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://huntic.ru/uplcv?utm_term=adobe+pdf+plugin PDF link annotation
- https://bohemiamaestro.com/webpagebuilder/ckfinder/userfiles/files/38558607269.pdfIn PDF document text
- http://atlantichomeportugal.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a97ea46425f---81844481296.pdfIn PDF document text
- https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/c9cf31278c457e888ae36f7c049099c0/41626656730.pdfIn PDF document text
- https://www.cir.cloud/wp-content/plugins/formcraft/file-upload/server/content/files/160a698e59ca1b---50573843632.pdfIn PDF document text
- http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/16071f31fd4f8d---fifomodezexofuvetixogaz.pdfIn PDF document text
- http://mynigaoe.com/upload/file/20210508224612.pdfIn PDF document text
- https://flyingfish-stay.com/userfiles/file/61388495845.pdfIn PDF document text
- http://training-solutions.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160ce86fc302c1---zezozusofo.pdfIn PDF document text

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