PDF malware analysis — malicious · 65ac7b3d3b60ce4c

MALICIOUS

PDF

49.6 KB Created: 2020-12-27 08:43:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05

MD5: 633432c5cdc177fe91d615b0ccb3cabc SHA-1: 72b2542cf875c5a6aa807420ed916901f74f6cbc SHA-256: 65ac7b3d3b60ce4c2491fc6fdfcf563708a7254aa8382a4edf8a60de7e93e2f1

252 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating malicious redirection and link farming, specifically pointing to a redirector URL. The ML classifier and ClamAV detection further support its malicious nature. The document body, though heavily obfuscated, contains metadata suggesting it was generated by wkhtmltopdf, a tool often used to create documents for malicious purposes.

Machine Learning

Nyx PDF Classifier malicious score 0.7011

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 links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK

PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM

Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK

PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
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://cctraff.ru/aws?utm_term=vehicle+mileage+log+book+template In PDF document text
- https://cdn-cms.f-static.net/uploads/4452152/normal_5f9ef36c8bda0.pdfIn PDF document text
- https://dazuvekojuj.weebly.com/uploads/1/3/4/8/134863877/pukijolu.pdfIn PDF document text
- https://cdn-cms.f-static.net/uploads/4446500/normal_5f9d7843ac714.pdfIn PDF document text
- https://disadaniti.weebly.com/uploads/1/3/4/4/134463451/d758eaa23ed086.pdfIn PDF document text
- https://static.s123-cdn-static.com/uploads/4449968/normal_5fc9df352194c.pdfIn PDF document text
- https://s3.amazonaws.com/xazarujokemus/90431364557.pdfIn PDF document text
- https://s3.amazonaws.com/tajimipojimo/math_in_the_modern_world_ched.pdfIn PDF document text
- https://s3.amazonaws.com/gixawetopoli/69998746241.pdfIn PDF document text
- https://s3.amazonaws.com/desekusoxi/free_psd_calendar_template_2020.pdfIn PDF document text
- https://s3.amazonaws.com/jajoxulabojaso/summoners_war_monsters_names.pdfIn PDF document text
- https://s3.amazonaws.com/vabemavuputenif/skullcandy_grind_wireless_manual.pdfIn PDF document text
- https://s3.amazonaws.com/votawawo/golopowedikome.pdfIn PDF document text
- https://s3.amazonaws.com/mutirexa/wiwoworiz.pdfIn PDF document text

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