Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b4823b9b387a604…

MALICIOUS

PDF

48.3 KB Created: 2021-09-20 02:09:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 6296ac11cf64183dca0cd8694432fb32 SHA-1: 03088b38984f521ac9f16d2ddb0aeb42547b2a97 SHA-256: 3b4823b9b387a604225a4f3719be9f8da7ebd845e22ea77e5c4fbc8832210e9e
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external URLs, many of which point to compromised websites or disposable hosting. The embedded JavaScript and link farm structure suggest an attempt to redirect users to malicious sites, likely for phishing or to download further malware. The ClamAV detection and ML classifier further support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8987

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
  • 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 https://catamma.ru/uplcv?utm_term=anime+sex+games+apk PDF link annotation
    • http://pololanna.com/user_img/files/52156111784.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/aef701e1b1e64f6e0656764b746c1b42/fokogovap.pdfIn PDF document text
    • https://minervatech.work/js/ckfinder/userfiles/files/42458003813.pdfIn PDF document text
    • http://otpetye.com/images/shared/file/pawekogupemux.pdfIn PDF document text
    • http://graphicon.hu/wp-content/plugins/formcraft/file-upload/server/content/files/1613f4d2d11a09---dujexukubemaxakogok.pdfIn PDF document text
    • http://www.oknookna.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1614314cdc510b---nezejata.pdfIn PDF document text
    • http://maquinandoysubastando.com/dleyes/admin/fotos/file/vokabenejabekujedipove.pdfIn PDF document text
    • https://lisacutler.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ac7d8aaaf4---76595449571.pdfIn PDF document text
    • http://xn--38-mlcqjbufcz6h.xn--p1ai/userfiles/file/fagapaxogesosodudizopit.pdfIn PDF document text
    • https://fancybox.pamlskovnik.cz/ckfinder/userfiles/files/41892934687.pdfIn PDF document text
    • https://gpuhub.net/wp-content/plugins/super-forms/uploads/php/files/v917j55od3ovf6l7ni4330qurk/15824394337.pdfIn PDF document text
    • https://churchosonline.com/wp-content/plugins/super-forms/uploads/php/files/07f0d1772a3459319af0520e9ff958d1/86828669137.pdfIn PDF document text
    • https://austdoorcaocap.com/upload/files/wusonoregeminisudugigewa.pdfIn PDF document text
    • https://ferdavagnar.is/images/fck/file/pawebutebuvupepusonaro.pdfIn PDF document text
    • http://mega.kz/media/upload/files/75619827041.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/4480835880.pdfIn PDF document text
    • http://neonatal-surgery.ru/userfiles/files/96976752754.pdfIn PDF document text
    • http://rogersdesignhouse.com/uploads/files/mutozatofewizexeb.pdfIn PDF document text
    • http://capesociety.ca/uploads/files/fupokakofazug.pdfIn PDF document text
    • http://xaydunglenguyen.vn/upload/files/f37a1d.pdfIn PDF document text
    • http://congtyvima.com/images/Download/24565640688.pdfIn PDF document text
    • http://conhantaoankhanh.com/webroot/img/files/98154474947.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16143acabcdc8e---95956608393.pdfIn PDF document text

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