Malicious PDF — malware analysis report

Static analysis result for SHA-256 689ba2b6c53ec130…

MALICIOUS

PDF

105.5 KB Created: 2021-06-30 06:10:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-22
MD5: 0922cc60d04b1d96314a1031d7c96afc SHA-1: 3c5db352cd8662d56db438a93e48cc378cdf2406 SHA-256: 689ba2b6c53ec13002dd4ad68f6dbb2b6defd6a84dbec3b3be4584ff8e1d3fb1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document exhibits characteristics of a phishing lure, indicated by the presence of a link farm pointing to multiple distinct hosts, some of which are hosted on compromised CMS upload storage. The ML classifier and ClamAV detection further support its malicious nature. While no scripts were explicitly extracted, the PDF structure and embedded URIs suggest an attempt to redirect the user to external resources, likely for credential harvesting or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5759

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://afslab.asia/upload/files/9987959348.pdf In PDF document text
    • http://billagelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/lajavanosirebabukelaj.pdfIn PDF document text
    • http://macautemple.com/userfiles/file/nimiwanedoxepo.pdfIn PDF document text
    • https://werbemittelag.chupload/file/1059294859.pdfIn PDF document text
    • https://www.quatainvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160b10135a6518---lavomawenikaje.pdfIn PDF document text
    • https://nowackleverkusen.de/wp-content/plugins/formcraft/file-upload/server/content/files/160aca11c95378---vovulisovuporukadagidot.pdfIn PDF document text
    • http://www.sg-callenberg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a735dbcf273---15298780818.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/kodogifoxobi.pdfIn PDF document text
    • http://eske.hu/wp-content/plugins/formcraft/file-upload/server/content/files/160b0149fe6057---37727669675.pdfIn PDF document text
    • http://ecbpolska.pl/wp-content/plugins/super-forms/uploads/php/files/a2a19458714bdf085ed55ffc6ffd6575/26591873648.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/1608938d210eac---51419375473.pdfIn PDF document text
    • https://lawrenceyezersky.com/userfiles/file/51739449402.pdfIn PDF document text
    • http://www.socalgreatwhite.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b3409c2142---7638274780.pdfIn PDF document text
    • https://pabausa.org/wp-content/plugins/formcraft/file-upload/server/content/files/160c3bdf26f4bc---84464171189.pdfIn PDF document text
    • https://kraftyz.in/ckfinder/userfiles/files/70189299149.pdfIn PDF document text
    • http://hellnocancershow.com/wp-content/plugins/formcraft/file-upload/server/content/files/16089cf60bb2f6---99811628165.pdfIn PDF document text
    • https://gz-topstar.com/wp-content/plugins/super-forms/uploads/php/files/e7666656037181619fc009c4621f82f8/kixiwinowarabexa.pdfIn PDF document text
    • http://vmkmsz.hu/userfiles/file/67570653722.pdfIn PDF document text
    • https://veritiesinstitute.com/wp-content/plugins/super-forms/uploads/php/files/cd44edf008a4808953561abedb3572f3/lonenoruderibelofe.pdfIn PDF document text
    • http://dblbtech.com/userfiles/file/jiwufizifaludutogijufo.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f8c388fc14---nomamabinudomapotovat.pdfIn PDF document text
    • http://baugeraeteverleih.de/benutzerdateien/pukuma.pdfIn PDF document text
    • https://nuevocoach.co.uk/wp-content/plugins/super-forms/uploads/php/files/03edc436bd8c6aa87b6079623fcbbacf/31385196955.pdfIn PDF document text
    • https://bompentax.com/quangbasanpham/app/webroot/upload/image/files/dixigimapuvemovifinasep.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=factor+a+3rd+degree+polynomialPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00018b19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18B19 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1