Malicious PDF — malware analysis report

Static analysis result for SHA-256 bda026f10c183db8…

MALICIOUS

PDF

63.7 KB Created: 2021-09-04 15:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 3f1149d1b390acd1e87687f355db7eb1 SHA-1: b5273d75a7c07109c44d34a01d5664d97416b271 SHA-256: bda026f10c183db803494118b0925b8829381a3996d545e760dfa62407fc69cb
152 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple links pointing to compromised WordPress sites, indicating an attempt to host and distribute malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' strongly suggests a phishing or trojan delivery mechanism. The presence of a raw IP address in one of the URIs further increases suspicion.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2988

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. 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://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ad1bb7c1f8---nazigemudotu.pdf In PDF document text
    • https://www.novet.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c414faa4f20---82590702293.pdfIn PDF document text
    • https://principesgs.com/userfiles/file/81767349229.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/1606fbad3a7051---vikajanagoligudaxojiju.pdfIn PDF document text
    • http://murphysbeads.com/clients/54316/File/wakidatukifewifokezasari.pdfIn PDF document text
    • http://www.kzhep.in.ua/wp-content/plugins/super-forms/uploads/php/files/lh704t4ibpub362u6rk1rig510/94721650448.pdfIn PDF document text
    • http://cartonwrappingmachine.com/userfiles/file/temonipani.pdfIn PDF document text
    • https://almoheetmanpower.com/public_html/userfiles/file/54003730555.pdfIn PDF document text
    • http://104.156.58.56/~web2inbox/wp-content/plugins/formcraft/file-upload/server/content/files/160a679c32f9e0---20147772319.pdfPDF link annotation
    • http://gazosilikatnn.ru/uploads/files/kiditabokasibegizabazora.pdfIn PDF document text
    • http://amphorabeautyclub.com/campannas/file/disojudalis.pdfIn PDF document text
    • http://0851gay.org/userfiles/202108file/2021082610053170554.pdfIn PDF document text
    • https://advik.net/userfiles/file/xisipalitigeja.pdfIn PDF document text
    • https://ksa-machinery.com/images/file/xegifor.pdfIn PDF document text
    • https://www.thecandystoresudbury.com/wp-content/plugins/super-forms/uploads/php/files/5igm77i2unbtvnq4b5e6nrt28g/zuxuwegoko.pdfIn PDF document text
    • https://roadtoring.com/wp-content/plugins/super-forms/uploads/php/files/5c112540789ce72d24190bf6be970d9b/67588647429.pdfIn PDF document text
    • https://m-isc.com/userfiles/file/bizunefarov.pdfIn PDF document text
    • https://napraforgohotel.hu/upload/file/89978528663.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160c314b2dbe7c---fubujikaletojulujeka.pdfIn PDF document text
    • http://czytamzezrozumieniem.pl/userfiles/file/73031126399.pdfIn PDF document text
    • http://vishwkarmaenterprises.com/webroot/img/userfiles/files/mexaletoxazoreba.pdfIn PDF document text
    • https://sgdivorcelawyers.com/wp-content/plugins/super-forms/uploads/php/files/02f88bcf2d02d28fde18e069d2243535/38624251790.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/4tb69hvigckj9966mdlrre4ab7/97673715745.pdfIn PDF document text
    • https://ewms.vn/wp-content/plugins/super-forms/uploads/php/files/cad9mdlqnqks6vkuf4bs9u2c3a/55728697025.pdfIn PDF document text
    • https://deewo.de/wp-content/plugins/formcraft/file-upload/server/content/files/1610b5f78678d1---93062087635.pdfIn PDF document text
    • http://www.johnknox.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160b7ab3e8adc8---gibixefedos.pdfIn PDF document text
    • http://evergreendentistryva.com/app/webroot/js/ckfinder/userfiles/files/wekumesujexinep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=grammar+worksheets+indefinite+pronounsPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC685 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000de9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE9C 11032 bytes
SHA-256: e115baaf66747a6df5e8b05dd9412b59d806844d2fd9bb4245c69a7825b6b461