PDF malware analysis — malicious · 5a0646a21fb7ce4a

MALICIOUS

PDF

62.2 KB Created: 2021-04-09 04:17:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)

MD5: 7597f87cbdd4612d8f3c4156479070f3 SHA-1: ac91710ac16081270157b335f467064b3192e4ca SHA-256: 5a0646a21fb7ce4a6cb8c0256a3edd9ad5ae1ba61fea2df550469d7f76fbd41e

184 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains a link farm with numerous external links, many pointing to disposable hosting, suggesting a phishing or spam campaign. The ClamAV detection and ML classifier indicate malicious intent, likely related to phishing or malware distribution. No scripts were extracted, but the presence of embedded URLs and the link farm structure strongly suggest an attempt to redirect users to malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.5137

Heuristics 5

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.
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://seumenha.ru/strik?utm_term=calculo+integral+unidad+4+definicion+de+sucesion
- https://cdn-cms.f-static.net/uploads/4394077/normal_601a57fb90442.pdf
- https://static.s123-cdn-static.com/uploads/4451039/normal_5fdecc05049bc.pdf
- https://waferipesor.weebly.com/uploads/1/3/5/3/135307907/xasivelop-pizadugifo-xuganokojok-pepide.pdf
- https://cdn-cms.f-static.net/uploads/4459776/normal_601e16f533d1d.pdf
- https://static.s123-cdn-static.com/uploads/4486037/normal_5fcb934057bd7.pdf
- https://sibitolifi.weebly.com/uploads/1/3/4/7/134732274/2706748.pdf
- https://static.s123-cdn-static.com/uploads/4486200/normal_5fef670f44d7c.pdf
- https://zovakilezogavi.weebly.com/uploads/1/3/1/1/131163957/3289167.pdf
- https://nitavadokeja.weebly.com/uploads/1/3/1/1/131163909/fowasojufudozilamup.pdf
- https://banafazag.weebly.com/uploads/1/3/4/3/134325205/wubet_xuvevonetivat.pdf
- https://30b7a97f-6117-4fff-8876-4b3c2220b6c6.filesusr.com/ugd/15cd4d_558c89bf7187431788e7c2eed32ab2df.pdf?index=true
- https://s3.amazonaws.com/fowonaxul/davupejilevuvotaligeradu.pdf
- http://jovuxajir.rf.gd/2018_mathematics_grade_12.pdf
- http://xajovezosesazu.epizy.com/18th_amendment_to_the_constitution_of_pakistan.pdf
- https://76a725e8-946c-4ae9-9249-cda469d35108.filesusr.com/ugd/83c8cc_c84e41afeb5b4e24b2b432ceaedbae09.pdf?index=true
- https://s3.amazonaws.com/kovibu/westworld_season_1_episode_5_script.pdf
- https://s3.amazonaws.com/nosepevozux/gmat_official_guide_2019_gmatclub.pdf
- https://35b1a599-9f45-4897-82ce-59a931fc5495.filesusr.com/ugd/daca0d_8e04a77ba9ca41dba79fcf132bf47308.pdf?index=true
- https://23751d96-d7b3-42ca-b8ca-e459b671ea95.filesusr.com/ugd/7de994_99ae90badad64b99a97ed21742b2dc02.pdf?index=true
- https://246406bc-bb0d-4f29-baed-d8a6153a9543.filesusr.com/ugd/3ddeef_f311b7bab5a6447b9a4e3239cc84ad27.pdf?index=true
- https://9c8f49e5-5895-4656-bc53-c560b1a0ede3.filesusr.com/ugd/0f7a6f_3d8b812854d94bde8e7c656df4064431.pdf?index=true
- https://1094d5c0-a920-47c7-a1de-7e2d56a92d84.filesusr.com/ugd/47b1e8_f3eaa37e9c824bdb8cae9796d65e9ecb.pdf?index=true
- https://e50eee24-2d95-422d-8083-6f618d95927b.filesusr.com/ugd/594ae5_b491398492f8467e953c13c397e7551c.pdf?index=true
- https://ebd157e6-94c3-4ff5-b3ab-516f87acbde6.filesusr.com/ugd/e87473_3ce32104593d402b8d70f14f03e04b0e.pdf?index=true
- https://1cbf0fd9-62af-4102-a3dc-982f361539e7.filesusr.com/ugd/bfbc46_663e0eb5c2ac4a6daece631fb17549b8.pdf?index=true

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