PDF malware analysis — malicious · 6139d4f4bf419969

MALICIOUS

PDF

54.0 KB Created: 2021-09-19 11:50:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24

MD5: 318890948c7502c2466edbcd1dfaf0a5 SHA-1: 7bfa8682fd6b25b666b0aa9143eac0f286cc3570 SHA-256: 6139d4f4bf41996974bd65fedfdeb097f266e08241a1f1f22b9b45cb54dcf8dc

132 Risk Score

Malware Insights

MITRE ATT&CK

T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code within documents. The heuristic 'PDF_SEO_DISPOSABLE_LINK_FARM' and the numerous extracted URLs suggest a phishing or spam campaign aimed at driving traffic to potentially malicious sites. The ML classifier and ClamAV detection further support the malicious nature of the file.

Machine Learning

Nyx PDF Classifier malicious score 0.8133

Heuristics 5

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.
Embedded JS stream low PDF_JS

PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
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://coretry.ru/uplcv?utm_term=movies+online+watch+free+sites PDF link annotation
- http://jn-zhsc.com/upload/kiwufuxafexine.pdfIn PDF document text
- http://blankheich.de/images/uploads/file/25826033213.pdfIn PDF document text
- https://cevhertemizlik.com/userfiles/files/pajakudetorepufolokipo.pdfIn PDF document text
- https://habrit.tw/ckfinder/userfiles/files/wakimubu.pdfIn PDF document text
- http://rayocazar.com/images/elfinder-1.1/files/file/2508091640.pdfIn PDF document text
- http://hefei.chinatupai.com/web/js/ckfinder/userfiles/files/vetosofimegogunig.pdfIn PDF document text
- http://laptopcuhaiphong.vn/upload/files/77578662885.pdfIn PDF document text
- http://beiwendq.com/userfiles/file/dovasifipoxofovuma.pdfIn PDF document text
- https://mmeasar.com/mmeasarfiles/file/jutemu.pdfIn PDF document text
- http://szintai.hu/ckfinder/userfiles/files/90728340267.pdfIn PDF document text
- https://master.plus/wp-content/plugins/super-forms/uploads/php/files/65a089ea90e6181d0bb646823753dc55/84801354019.pdfIn PDF document text
- http://autofactory-jin.com/js/upload/files/10492060129.pdfIn PDF document text
- http://4reality.cz/userfiles/files/67971530452.pdfIn PDF document text
- http://elfast.ru/userfiles/file/77541695648.pdfIn PDF document text
- http://retailcop.ca/files/geteg.pdfIn PDF document text
- http://duocmyphamcongty.com/app/webroot/uploads/files/xakidoruroj.pdfIn PDF document text
- http://ailizia.com/userfiles/judivajilelog.pdfIn PDF document text
- http://a2kat.ru/userfiles/file/noriwa.pdfIn PDF document text
- https://mavibusiness.it/file/2380505067.pdfIn PDF document text
- http://inventory-acepipe.com/images/uploads/files/73811586337.pdfIn PDF document text
- https://hkparkkonutlari.com/image/files/40116093172.pdfIn PDF document text

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