PDF malware analysis — malicious · 43b621c97db7053b

MALICIOUS

PDF

34.3 KB Created: 2020-12-01 21:07:15 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-06-05

MD5: 99c8b9270acbccb444bd320cdd7c695e SHA-1: d656ca33e6f114e502b9dd0c80885389bcf5e14d SHA-256: 43b621c97db7053b347a599cf4e9c043bfab03a558e35fb1881c1a47d72b536a

154 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file is identified as malicious by multiple heuristics, including ML classification and ClamAV, indicating it's a phishing lure. It contains a single image and minimal text, typical of a screenshot lure designed to conceal a clickable link. The embedded URL, https://trafffi.ru/strik?utm_term=intensive+and+extensive+properties+chemistry, is an SEO redirector, further supporting the phishing pretext.

Machine Learning

Nyx PDF Classifier malicious score 0.9256

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
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.
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 34 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
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://trafffi.ru/strik?utm_term=intensive+and+extensive+properties+chemistry PDF link annotation

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