Malicious PDF — malware analysis report

Static analysis result for SHA-256 b505cc1821457dcd…

MALICIOUS

PDF

58.6 KB Created: 2021-06-18 21:07:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 33e4a1586179d8fe488990f92e4d4f0e SHA-1: d5411e918354eb01d9aee3b54a5cecc5199c8f19 SHA-256: b505cc1821457dcd2d919d5d90e077e83cf6db5afee7a450f6ebb3343222c08d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to external websites, many of which appear to be compromised or hosted on disposable domains, suggesting a link farm designed to redirect users to malicious content. The ClamAV detection and ML classifier further indicate malicious intent, likely related to phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and embedded URIs are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6847

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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 http://serendipityorlando.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075853035ba0---zifofivopizi.pdf In PDF document text
    • https://www.ayersworthglen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160895ce15dc48---kupejozizoxifavaguzosag.pdfIn PDF document text
    • http://stylowa-pss.pl/userfiles/file/89359256912.pdfIn PDF document text
    • https://matskaren.se/anvandarbilder/203/files/pozew.pdfIn PDF document text
    • https://stpetejazz.com/wp-content/plugins/super-forms/uploads/php/files/4glkbe7cnu0it6coe7hsl79si7/sadazotunulizuwage.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/50968742650.pdfIn PDF document text
    • https://bringem.de/wp-content/plugins/super-forms/uploads/php/files/41939293f887cf17f2c1d8cbbe3b4755/48084833549.pdfIn PDF document text
    • http://pkynfe.net/userfiles/file/jujuf.pdfIn PDF document text
    • https://www.heainc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f10ae1d320---75812940714.pdfIn PDF document text
    • https://www.apartamentselsllacs.com/wp-content/plugins/super-forms/uploads/php/files/c600je29f76ob5ghq8q89g97uk/15925822536.pdfIn PDF document text
    • http://geology.ie/wp-content/plugins/formcraft/file-upload/server/content/files/16075eef50e301---14734584614.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/e18a5c2b4873a9aa6e30e2e165b51f91/tirafewogulimu.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/74999593747.pdfIn PDF document text
    • https://vashadvokat82.ru/wp-content/plugins/super-forms/uploads/php/files/eb5114942e47a136fb1a567d22820b2b/kudapirupasebiven.pdfIn PDF document text
    • https://www.cocochan.com.pk/wp-content/plugins/super-forms/uploads/php/files/7e2b4221e271e0b0598a81a98c97197a/47170338665.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/PmAiG5ZyT-k/uplcv?utm_term=new+malayalam+mp3+songs+free+download+vellithiraPDF link annotation

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