Malicious PDF — malware analysis report

Static analysis result for SHA-256 29cc5d4d869df07f…

MALICIOUS

PDF

76.2 KB Created: 2021-05-05 13:32:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: a463a142c9f990ab62f2714c4c636c79 SHA-1: 2233eefcb2276ca5ff025bdcc57f780dd67fff30 SHA-256: 29cc5d4d869df07f8d8235ba466fc7d677c2528038bf549c1fd7519bebb286f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are consistent with techniques used to host malicious content or redirect to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9727

Heuristics 5

  • 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.
  • 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://ilc.ua/wp-content/plugins/super-forms/uploads/php/files/q860ogvi622b31g47v78fc0kg5/gikababobifov.pdf In PDF document text
    • https://rebel-guitars.com/wp-content/plugins/super-forms/uploads/php/files/9777f4e44985c71de4e3b706651542ce/worevasulufatejejomo.pdfIn PDF document text
    • https://www.adcgrain.com/wp-content/plugins/super-forms/uploads/php/files/d93a44abdfc46bbde5adf093a7e7f211/subugufatawepixojenovefax.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/c7323f4ac15d936ea180b725328f1247/kezegapejajudobutisile.pdfIn PDF document text
    • https://utilitydiscount.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e66b6d92c4---43493328808.pdfIn PDF document text
    • http://aftckwt.com/uploads/file/lepumuguwo.pdfIn PDF document text
    • https://lynnesnaturaltreats.com.au/wp-content/plugins/super-forms/uploads/php/files/601ae1fbcf61a14b7bb77c644135e967/busudof.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/42aeaa341a0560a9520bdf00ddadaa55/lutopegumemiwulune.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16082866b22089---91251824267.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/73983889353.pdfIn PDF document text
    • https://interesttour.com/wp-content/plugins/super-forms/uploads/php/files/14a7c379d67e07d212be7382af384bee/59801166823.pdfIn PDF document text
    • http://caacoding.net/wp-content/plugins/formcraft/file-upload/server/content/files/16075e232ab157---56957257466.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1607ea797cc010---8128779651.pdfIn PDF document text
    • https://sasalidayanisma.org/uploads/file/bibolevejixule.pdfIn PDF document text
    • https://relaxationplusmn.com/wp-content/plugins/super-forms/uploads/php/files/ae4212047801ef3e5405b20799a139d7/95559248089.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/290a4aef98df82cfbdaed3d585b3287a/95257811462.pdfIn PDF document text
    • http://akinmedikal.com/uploads/file/41637948113.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=anthracycline+induced+cardiomyopathy+guidelinesPDF link annotation

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