Malicious PDF — malware analysis report

Static analysis result for SHA-256 104724d97ef67723…

MALICIOUS

PDF

47.3 KB Created: 2021-09-25 08:04:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-20
MD5: b8dce1fb5bf78dd9bd75360788d97c65 SHA-1: 8acd633ee0ca3a6fbc465a3bb73fea5f6277a596 SHA-256: 104724d97ef67723b425e98b2affcac46a41eace0bef045c05950c82c00d948a
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded JavaScript and multiple links to external PDFs hosted on various domains, some of which are identified as compromised CMS uploads or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution by leveraging a QR code generator lure. The embedded JavaScript is likely responsible for executing the malicious payload or redirecting the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7840

Heuristics 6

  • 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.
  • JavaScript action low PDF_JAVASCRIPT
    PDF contains a /JavaScript action. 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 http://dpholding.ru/uploads/files/75332452646.pdf In PDF document text
    • http://ekogamma.pl/javascript/ckfinder/userfiles/files/1568241968.pdfIn PDF document text
    • http://akcihlar.cz/userfiles/file/50960320213.pdfIn PDF document text
    • http://www.fdconsult.qa/public/uploads/cms_files/gatomojilederomokugo.pdfIn PDF document text
    • https://elitteaccesorios.com/wp-content/plugins/super-forms/uploads/php/files/pb3ul511v2hb6dvq8sttp8vdc3/60971891464.pdfIn PDF document text
    • http://apsons.eu/files/file/vuwozom.pdfIn PDF document text
    • https://pasarantogel2.com/contents/files/taputolubo.pdfIn PDF document text
    • http://e5tbr2.alruaa.com/ckeditor-ckfinder-integration/uploads/files/78743853375.pdfIn PDF document text
    • http://architettogherardi.eu/userfiles/files/muwigazolegufegezovoji.pdfIn PDF document text
    • http://alhegazgroup.com/userfiles/file/weliwatixos.pdfIn PDF document text
    • http://c2r-auto.com/uploadfiles/file/2021090109112873499.pdfIn PDF document text
    • https://raghuvirtrading.com/userfiles/file/10793170865.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/89a213865fe0f314886adda2a06d9973/69935552434.pdfIn PDF document text
    • http://villa-margherita.biz/userfiles/files/41012022100.pdfIn PDF document text
    • http://fasson.vip/images/editor/files/fusagek.pdfIn PDF document text
    • http://poexali.org/static/image/_u/system/files/96597041087.pdfIn PDF document text
    • http://nocleginaplus.pl/uploads/userfiles/files/77301264729.pdfIn PDF document text
    • http://meghdoothsuzuki.com/uploads/sepilimikigarotareda.pdfIn PDF document text
    • https://cjsc.se/ckfinder/userfiles/files/10207703729.pdfIn PDF document text
    • https://treasurehunterdetectors.solar-ovens.net/ckfinder/userfiles/files/pukopafudibagu.pdfIn PDF document text
    • https://www.dentaltaxpros.com/wp-content/plugins/super-forms/uploads/php/files/b2c77f1401423362580b62376db4356d/31451738616.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/1xuhb7AK25c/uplcv?utm_term=qr+code+generator+download+windowsPDF link annotation

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