Malicious PDF — malware analysis report

Static analysis result for SHA-256 e11787f6183a6124…

MALICIOUS

PDF

38.6 KB Created: 2021-05-22 17:57:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: f81228fb45072469176fc1cc808a104f SHA-1: 1533050d37ceaa633949f68410fd09b9c63441c7 SHA-256: e11787f6183a61242dd713889a380fc8ac9d0d92a51b8bbd5d274a39758bf217
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document is identified as malicious by ClamAV and a machine learning classifier, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to trick users into interacting with embedded links. Multiple links point to compromised WordPress upload directories and disposable hosting, suggesting an attempt to distribute further malicious content or conduct phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6833

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 38 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 http://www.chicagoalphas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d26ae41313---33278350825.pdf In PDF document text
    • http://www.wallisandemmanuel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e8dccba5fd---duxojawoxogi.pdfIn PDF document text
    • https://myupfield.link/wp-content/plugins/super-forms/uploads/php/files/p11rf914t47bu1r7mncbckgaq2/77551022599.pdfIn PDF document text
    • https://webtraffic.ch/wp-content/plugins/super-forms/uploads/php/files/kb6ldlr269op0bec3qb88r0ihv/44979625426.pdfIn PDF document text
    • https://space1500.com/wp-content/plugins/super-forms/uploads/php/files/e3c73d8de382de38dc93889895ecdbd2/10147105424.pdfIn PDF document text
    • http://lookkorea.net/userfiles/file/jovetodefovakumubaweza.pdfIn PDF document text
    • http://sazjah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609876034f757---11371336821.pdfIn PDF document text
    • https://3dreamvr.com/wp-content/plugins/super-forms/uploads/php/files/1b3813c1b261f09b5ba4a88765e6af46/30493320336.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/1608f2d7d9cbd2---wiradawagirotafefazuj.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=whatsapp+dare+games+for+friends+with+answers+downloadPDF link annotation

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

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