PDF malware analysis — malicious · f66b9a0ad7460e9e

MALICIOUS

PDF

55.8 KB Created: 2021-04-09 13:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-08-25

MD5: ccf4fb5467b5f7b0969d88a54944ef1f SHA-1: e9d0308e65b7767869a571daed0c0a549b37ee52 SHA-256: f66b9a0ad7460e9e965a59e1d97393de1ca996c80924b1597d6f0752c0a3508d

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. Heuristics indicate it functions as a link farm with many embedded URLs pointing to potentially disposable hosting. While no scripts were extracted, the PDF structure and numerous links suggest an attempt to redirect users to malicious sites for phishing or malware delivery.

Machine Learning

Nyx PDF Classifier malicious score 0.7659

Heuristics 4

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 http://www.guninetwork.org/system/files/webform/heirri_proposals/dagen.pdf In PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/sidetarebuw.pdfIn PDF document text
- https://www.pharoxglobal.com/sites/default/files/webform/garuwofewitenobakufenewi.pdfIn PDF document text
- https://extranet.blanchisserie-toulousaine-de-sante.com/sites/extranet.blanchisserie-toulousaine-de-sante.com/files/documents/justificatifs/ratasivovo.pdfIn PDF document text
- https://www.woonsocketri.org/system/temporary/webform/51053607868.pdfIn PDF document text
- http://cicatsalud.com/html/sites/default/files/webform/buvonajevomowetizebijix.pdfIn PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/xetomaroronep.pdfIn PDF document text
- http://klm3fg.grhosting.cz/sites/default/files/webform/files/30253637425.pdfIn PDF document text
- http://oaklandchildcare.org/sites/default/files/webform/41266633523.pdfIn PDF document text
- https://grossenbacher.co.nz/en/system/files/avoidance-training-certificates/13178745316.pdfIn PDF document text
- https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=cuento+jorge+bucayPDF link annotation
- https://printandmail.princeton.edu/system/files/webform/31356988355.pdfIn PDF document text
- https://community.princeton.edu/system/files/webform/wijudabopijobomoxusosul.pdfIn PDF document text
- https://ubmemeaensoprod.s3.amazonaws.com/ifsec_international/call_for_papers/2021/03/1901815882.pdfIn PDF document text
- https://lib.asu.edu/system/files/webform/46247033309.pdfIn PDF document text
- https://www.vub.be/sites/vub/files/webform/43319512550.pdfIn PDF document text
- https://www.vub.be/sites/vub/files/webform/fazarixi.pdfIn PDF document text

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PDF

Malware Insights

Machine Learning

Heuristics 4

Related samples 8