Malicious PDF — malware analysis report

Static analysis result for SHA-256 3aa5d33921a00d87…

MALICIOUS

PDF

60.0 KB Created: 2021-09-17 06:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 62f62d84386aed67716fdfecbd6c1a4f SHA-1: 59bf945e1bac2ee7f89394ad31a11af75f075202 SHA-256: 3aa5d33921a00d870ca08de3ffacbd123582cfc69016c718ffef79784b592c98
144 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file is detected as malicious by ClamAV and exhibits characteristics of a phishing lure, including being image-only with a clickable action. It contains numerous external links, many pointing to compromised WordPress upload directories or disposable hosting, suggesting a link farm designed to redirect users to malicious sites. While no scripts were explicitly extracted, the PDF structure and heuristic firings indicate it's designed to facilitate the download or redirection to a malicious payload.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3246

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image-only document with action trigger (screenshot lure) medium PDF_IMAGE_LURE
    PDF has 1 image(s), only 0 text block(s), carries a click-outward action, and is only 60 KB — typical shape of a phishing lure where a full-page screenshot hides a clickable button that launches or submits to an attacker URL.
  • 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://crewmak.ru/uplcv?utm_term=demon+slayer+movie+mugen
    • https://edusfera.pl/upload/file/138102139.pdf
    • http://jiuxingchaoshi.com/uploads/file/030137183383.pdf
    • http://asv-solnice.cz/_files/file/nawaz.pdf
    • http://suportti.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614283cab7289---37067338588.pdf
    • http://nrgmedia.hu/files/file/jenunelibotamebivog.pdf
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/161408c3844c8e---50836422997.pdf
    • https://b7b.reviewz.eu/app/webroot/files/userfiles/files/21357005045.pdf
    • https://rebates.forex/wp-content/plugins/super-forms/uploads/php/files/foo6tsco4r6apbfci33m17plk1/87201273272.pdf
    • http://vizit-k.net/uploads/editor/files/1602545468.pdf
    • http://qazaqbanki.kz/data/content/files/41189229350.pdf
    • http://d-a-s.cn/userfiles/file/fuponapanarawusovale.pdf
    • http://drentmedischadvies.nl/uploads/files/70695063538.pdf
    • http://techcessgroups.com/userfiles/file/sumomulebukonewemalem.pdf
    • http://adacu.org/userfiles/file/20210913130954.pdf
    • http://deurwater.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614194db15e4e---78626919132.pdf
    • http://mydreamtuscanwedding.com/editor_up/rozorurulopewiwumuwibu.pdf
    • https://aslimitada.com/userfiles/file/84935503354.pdf
    • https://suncables.co/images/file/3672187102.pdf
    • https://hr-serdahel.hu/images/file/59232717375.pdf
    • http://lasermedia.cn/userfiles/file/38542545844.pdf
    • http://tdbakademi.org/userfiles/files/12712147736.pdf
    • http://hindustanadvancedsolution.com/t/tutorfirm/uploads/ck/files/vunusalavinijogigi.pdf
    • http://jeyadhurgatemple.com/userfiles/file/wikikadofejigijuxa.pdf
    • https://littleedupark.com/ckfinder/userfiles/files/tosirixapigaseta.pdf
    • http://tele-klass.ru/i/upload/files/zuwupakitexedosi.pdf
    • http://potentialdesign.cn/userfiles/file/1631422269.pdf
    • http://scsychem.com/upload/files/21030138442.pdf

Open this report in the interactive analyzer, or submit your own file for analysis.