PDF malware analysis — malicious · 04c149e3a2534c97

MALICIOUS

PDF

50.6 KB Created: 2021-01-04 17:42:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 308e6ce3b7733a98e5c473703212c603 SHA-1: 3fb74ab53b576dc132226b277d49925fa5b63ff6 SHA-256: 04c149e3a2534c976d9c1f1adf26b2cfee650d7be9e9ec786d634660ab8f5c3d

242 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF was flagged by multiple critical heuristics as a malicious redirector and link farm. It contains numerous links to external sites, with at least one pointing to known malicious infrastructure. The ML classifier also indicated a high probability of maliciousness. The document body is largely unreadable binary data, suggesting it's not intended for human consumption but rather to host links.

Machine Learning

Nyx PDF Classifier malicious score 0.7801

Heuristics 5

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

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
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.
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://traffmen.ru/aws?utm_term=melioidosis+treatment+guideline+%25E0%25B9%2584%25E0%25B8%2597%25E0%25B8%25A2
- https://cdn.sqhk.co/kizofapekeku/jdjeggf/mojoja.pdf
- https://cdn.sqhk.co/kanedufopuma/ShbheCC/tovurisosanobiravijufines.pdf
- https://vurofagulomefu.weebly.com/uploads/1/3/1/4/131452840/xataxozuz.pdf
- https://patewowuxafopon.weebly.com/uploads/1/3/4/5/134595548/wubigekizopukawodib.pdf
- https://zaridonuxubotu.weebly.com/uploads/1/3/0/7/130775126/mipudibavi.pdf
- https://zewabezasakaru.weebly.com/uploads/1/3/4/5/134593707/dazufuwulixedidoza.pdf
- https://feruvemigik.weebly.com/uploads/1/3/4/6/134693586/zabasuzoremegeguta.pdf
- https://nuvitofoje.weebly.com/uploads/1/3/4/6/134640236/4265620.pdf
- https://baxikulalul.weebly.com/uploads/1/3/4/5/134582220/3575753.pdf
- https://uploads.strikinglycdn.com/files/c6996351-29b6-4a23-9d76-178afe200ec2/78558201303.pdf
- https://uploads.strikinglycdn.com/files/2a35e92c-0d6c-4e59-a610-42334ff9bacc/elements_of_music_notation.pdf
- https://uploads.strikinglycdn.com/files/db41c734-55da-40b0-ac67-cb03b8ae67ee/pofiloso.pdf

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