Malicious PDF — malware analysis report

Static analysis result for SHA-256 88ac71d38beb7eba…

MALICIOUS

PDF

44.4 KB Created: 2021-09-14 01:17:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ba49e0b3b42246c1443b3f6d0827fcfb SHA-1: a36736d7569d691bc2262ea8923ffbc10fa0c742 SHA-256: 88ac71d38beb7eba1fa93031e45e5a797a75c9ebcdfc9c058783baa4d4a48cc5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to redirect users. ClamAV detection as 'Pdf.Phishing.Trojan' and ML classification further support its malicious nature. The primary attack pattern involves luring users to external sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7853

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://jpt.mysmartedu.com/uploadimages/files/77184418232.pdf In PDF document text
    • http://vasekurzy.cz/userfiles/file/fefizufupanobotuve.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1613406f3a10a8---sufagebowizinuteve.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1613a085334aa2---13840882826.pdfIn PDF document text
    • https://goez1.com/10005001208290177/ckfinder/userfiles/files/doladega.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/wetiwatufurafos.pdfIn PDF document text
    • http://hotelbelleepoque.bg/userfiles/file/pipusikiboxetagajitemamu.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/23090976251.pdfIn PDF document text
    • http://unicaconsultoriarh.com/images/files/zifafuxexikarepos.pdfIn PDF document text
    • http://asid.rw/userfiles/file/gepegisoti.pdfIn PDF document text
    • http://kbchina.de/upload/zobogotufelusapij.pdfIn PDF document text
    • https://goodluckfishing.com/ckfinder/userfiles/files/wixexoru.pdfIn PDF document text
    • https://xtrafitcoaching.com/www/images/files/33682189779.pdfIn PDF document text
    • http://giaydantuongphongngudep.com/images/news/file/nadifofijamobobumebeji.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/16132f19827270---54581236251.pdfIn PDF document text
    • https://happyjourney.webtrails.in/ckfinder/userfiles/files/46499331481.pdfIn PDF document text
    • https://manpowernepal.net/ckfinder/userfiles/files/78651016811.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/85592328102.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/72933147983.pdfIn PDF document text
    • http://erbaytag.com/resimler/files/koziva.pdfIn PDF document text
    • http://dzirerealtors.com/uploads/66275926081.pdfIn PDF document text
    • http://nataliashishkina.com/userfiles/file/nagitonejudoxedukedevalu.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=cara+melacak+posisi+hp+androidPDF link annotation

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