Malicious PDF — malware analysis report

Static analysis result for SHA-256 da7b3949e49a466a…

MALICIOUS

PDF

42.4 KB Created: 2021-07-09 06:54:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-25
MD5: c835014f03f822d51241d49df02f9f92 SHA-1: 1e7bba8492962e2344df37a4346edc8a63caa76e SHA-256: da7b3949e49a466a8f3169f7bdd93ce390ab7cdf8752db84baf198d47b233291
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories and uses an image-based lure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6947

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 42 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://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/3a09pooanihh883bmf2oc4og84/zeroparunupadi.pdf In PDF document text
    • https://amerismithenterprises.com/wp-content/plugins/super-forms/uploads/php/files/751ef477db21662969f7abc89f643c3a/73800129257.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609627ba98578---18694225515.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/vt4nr777dma7cc29r7gm67l466/fepisa.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b2cde7153ab---devetijolalejaj.pdfIn PDF document text
    • http://www.kevinbrooks.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1609f1ecb318db---59809936604.pdfIn PDF document text
    • https://vieclamhanoi247.com/upload/files/23977451770.pdfIn PDF document text
    • https://adiwirawanbali.com/wp-content/plugins/super-forms/uploads/php/files/39b0b9298206929b1846ea393ef6f38a/51832745257.pdfIn PDF document text
    • http://secohthailand.com/file_media/file_image/file/famevusoxarowabikev.pdfIn PDF document text
    • https://sgcaregiver.org/contents/files/65573558894.pdfIn PDF document text
    • https://canionglobal.com/FCKeditor/file/19409951702.pdfIn PDF document text
    • http://happyland-nsk.net/ckfinder/userfiles/files/jekepaf.pdfIn PDF document text
    • https://amartzon.store/wp-content/plugins/super-forms/uploads/php/files/72e5d7a043b9f4a554efa839a1a985b0/98991653329.pdfIn PDF document text
    • http://unicorn-furnitures.com/d/files/setaxe.pdfIn PDF document text
    • http://jointrilogy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce3fd657b0---17241206523.pdfIn PDF document text
    • https://paloaltospeakerseries.com/wp-content/plugins/super-forms/uploads/php/files/3b2e9c11abf438543511494d5804410a/nomeda.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/f8dc19fc5792554c9bb4764cbfb6e6fd/sajijujazelesuzajaral.pdfIn PDF document text
    • http://melly-incendie.fr/img_db/23178222380.pdfIn PDF document text
    • http://lookupagency.es/wp-content/plugins/formcraft/file-upload/server/content/files/160ccedd785ddd---vovidinejalakunedu.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/7a89e8cbe80905b99192b4808254a56b/rasolobegipiwemebevewugar.pdfIn PDF document text
    • https://carthink.org/wp-content/plugins/formcraft/file-upload/server/content/files/1608ecd05c58bd---refapox.pdfIn PDF document text
    • http://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/1606d2a775efcf---mumasameruseja.pdfIn PDF document text
    • http://panteres.com/files/files/benomupipogiwepep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=input+character+array+in+javaPDF link annotation

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