Malicious PDF — malware analysis report

Static analysis result for SHA-256 09ed0a5fad4c61e2…

MALICIOUS

PDF

42.1 KB Created: 2021-09-26 11:37:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: 012103273c70cd0c59d3980d72f9af55 SHA-1: aa7306970d12dcf0e016b74a1289d97159d7a038 SHA-256: 09ed0a5fad4c61e2be47bd43498fb9cb4ee0e95dded1821c49696dba226e9ad7
182 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating an attempt to redirect the user to malicious content or download further payloads. The heuristic firings suggest this is a phishing lure, likely using an image to obscure clickable links. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7347

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 42 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.
  • 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 http://xn--76-6kca8aqc6c.xn--p1ai/pic/userfile/jewakuponofaje.pdf In PDF document text
    • http://rheumatology.institute/upload/content/file/fusitaxukelepe.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/54e6f397aef55bb68552531b02916b45/zumexatakekibebawuso.pdfIn PDF document text
    • https://mauspro.net/upload/files/faxokivaxuteka.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/16142179bc3b68---nufunagobivulolufitobapop.pdfIn PDF document text
    • https://stw-nowogard.pl/download/file/mokiju.pdfIn PDF document text
    • https://abhrian.com/userfiles/files/13805112132.pdfIn PDF document text
    • https://plantbiochem.com/ckfinder/userfiles/files/wimusajosilijujibivaxor.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/pumizotigagomi.pdfIn PDF document text
    • https://kvgrup.com.ua/wp-content/plugins/formcraft/file-upload/server/content/files/16141b7872d221---86253656114.pdfIn PDF document text
    • http://daehnfeldt.com/userfiles/file/42003471742.pdfIn PDF document text
    • https://gsacademy.ge/uploads/files/wuzixudazabixanaliziviliv.pdfIn PDF document text
    • http://mama.plovdivweek.com/js/ckfinder/userfiles/files/67382662220.pdfIn PDF document text
    • http://dolupin.com/calisma2/files/uploads/pamerabudiki.pdfIn PDF document text
    • http://villaturri.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614ed8b9823f9---lenixedezivaxejewolu.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/witadewi.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/wewipezeras.pdfIn PDF document text
    • http://gitishahjahanpur.org/ckfinder/userfiles/files/kikipipuf.pdfIn PDF document text
    • https://axlthailand.com/imagexx/files/35472587055.pdfIn PDF document text
    • http://homeopathyhk.com/files/napigezoxixolojinumowuxe.pdfIn PDF document text
    • http://terralis.eu/catalogue_dynamique/file/kexap.pdfIn PDF document text
    • https://duythanhsd.webthoidai.com/img-dn/files/57758810847.pdfIn PDF document text
    • http://evola.it/userfiles/files/64071378307.pdfIn PDF document text
    • https://growyourmoney.in/userfiles/files/leguxoguduziraneb.pdfIn PDF document text
    • https://gameadvisers.com/js/new/fckeditor/userfiles/file/3518042396.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BvfzZFkJO3s/uplcv?utm_term=ps1+highly+compressed+games+downloadPDF link annotation

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