Malicious PDF — malware analysis report

Static analysis result for SHA-256 2bf4064207a90720…

MALICIOUS

PDF

39.6 KB Created: 2021-06-10 19:50:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: e23fb6e17e9a25b0aec64f1b12428a88 SHA-1: 278c84adcd30c56465a09d364aee02ccb5a4d09c SHA-256: 2bf4064207a907203ad63b1d5c399f77baf51b4d64e8f22750ca2ecb96a95421
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF is identified as malicious by ClamAV and an ML classifier, exhibiting characteristics of a phishing lure. It contains a single image and minimal text, typical of a screenshot designed to trick users into clicking an embedded link. Multiple URLs were extracted, many pointing to compromised WordPress sites, suggesting a link farm used to distribute malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9804

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 39 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://coretry.ru/uplcv?utm_term=pearson+mylab+homework+answers PDF link annotation
    • https://k-kompany.ru/wp-content/plugins/super-forms/uploads/php/files/3f7c421bc1bf19ce7a12e0276d6f9d7f/faragegalijakarikujalirak.pdfIn PDF document text
    • https://residenciasanamaro.es/userfiles/files/44582812845.pdfIn PDF document text
    • https://aimhc.com/userfiles/file/23742630631.pdfIn PDF document text
    • https://www.kiteschule-kiel.de/wp-content/plugins/formcraft/file-upload/server/content/files/16093d50773e90---15972216318.pdfIn PDF document text
    • http://zuche0551.com/upload/file/27643869836.pdfIn PDF document text
    • http://warraichmeats.com/wp-content/plugins/formcraft/file-upload/server/content/files/160738f4578cd6---50620864571.pdfIn PDF document text
    • https://mehreganimaging.ir/images/upload/files/37298974769.pdfIn PDF document text
    • https://www.sadcmedia.com/wp-content/plugins/super-forms/uploads/php/files/382d2sttdi81jfaltmbsssq3df/32115323859.pdfIn PDF document text
    • https://carea2plus.com/wp-content/plugins/super-forms/uploads/php/files/04f10d1be9a83c16a854ffd4741e8703/gufavoluzoganuxigorer.pdfIn PDF document text
    • https://brusroom.com/wp-content/plugins/super-forms/uploads/php/files/12a7b3bff7e11ad80a7ec2f3ce01883b/jegutemisirefo.pdfIn PDF document text
    • https://fallsplat.se/file/49130473704.pdfIn PDF document text
    • http://uniondeautoescuelas.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b134116f70---rubewetuxidukenunemidomu.pdfIn PDF document text
    • http://banphimchuot.com/userfiles/file/xukuzivaduliwolivuragufi.pdfIn PDF document text
    • http://nsdadventist.org/FCKData/file/45716554982.pdfIn PDF document text
    • https://sip7.pl/autoinstalator/sip7.online/wp-content/plugins/super-forms/uploads/php/files/95f79d0861ff01858f0b0b410e733386/85275905723.pdfIn PDF document text
    • https://artsketch.ru/wp-content/plugins/super-forms/uploads/php/files/f1a929f78130d6d1ef701fa3d483812d/biwubaseta.pdfIn PDF document text

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