PDF malware analysis — malicious · 1b73fd83848d35b8

MALICIOUS

PDF

62.3 KB Created: 2021-09-17 08:45:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27

MD5: 61e51d6ca08fcaa7bab72381abe9214c SHA-1: 0589c362a3dee6ed06df2ca8bea46cf3b83e1ebb SHA-256: 1b73fd83848d35b8badde3227f413320078c6d9d18c003a9e1b91ea5bd046057

124 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF file was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous external URIs, including one pointing to 'synerhu.ru', suggests a phishing or malware distribution attempt. The PDF structure and embedded links indicate it functions as a link farm, designed to redirect users to potentially malicious sites.

Machine Learning

Nyx PDF Classifier malicious score 0.7088

Heuristics 4

ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION

ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
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://synerhu.ru/uplcv?utm_term=why+app+is+not+installing+from+play+store PDF link annotation
- http://elfobchod.cz/foto/Image/file/voduvitujejabexaduwozup.pdfIn PDF document text
- http://mail.me.ntou.edu.tw/ckfinder/userfiles/files/20210913_061810.pdfIn PDF document text
- http://baheth24aqari.com/ckfinder/userfiles/files/fogefivabipugu.pdfIn PDF document text
- https://aykutemlak.com/upload/ckfinder/files/gupumopuzujipuso.pdfIn PDF document text
- http://palestraarkadia.it/userfiles/files/85370242276.pdfIn PDF document text
- http://td-mg.ru/uploads/files/luvufewab.pdfIn PDF document text
- https://actaviaserica.org/board/file/files/68213480770.pdfIn PDF document text
- http://squash-fitness.cz/userfiles/file/34635965776.pdfIn PDF document text
- https://www.renfrewareahealthvillage.ca/ckfinder/userfiles/files/mixivi.pdfIn PDF document text
- http://fgosvo.ru/files/files/likagizokeronoganuj.pdfIn PDF document text
- http://zdravi-kromeriz.cz/files/file/8003383829.pdfIn PDF document text
- https://feldmann-spedition.de/pics/userfiles/file/jebira.pdfIn PDF document text
- https://tckontrola.hr/files/fobupu.pdfIn PDF document text
- https://bloc-immo.com/images/78216466272.pdfIn PDF document text
- http://dastone.ru/userfiles/file/lerixafomukivekefukaf.pdfIn PDF document text
- https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613aae430d794---86809298307.pdfIn PDF document text
- http://naasschoolofmotoring.com/fckeditor/userfiles/file/77373050788.pdfIn PDF document text
- https://www.q-jin.ne.jp/ckfinder/userfiles/files/jedilexodujujomivunisa.pdfIn PDF document text
- http://runo34.ru/attachments/file/pigebe.pdfIn PDF document text
- https://rescue.bg/wp-content/plugins/formcraft/file-upload/server/content/files/1613df1477ecb8---22083687981.pdfIn PDF document text
- https://www.posluh.hr/ckfinder/userfiles/files/jepale.pdfIn PDF document text

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