Malicious PDF — malware analysis report

Static analysis result for SHA-256 b9ad71d95e7e5814…

MALICIOUS

PDF

92.9 KB Created: 2021-08-03 02:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: de4e5d69360ee8e2c0efa553b867af17 SHA-1: 619d63d7491e1ca7d4a76b4f5045dd26d3457ea7 SHA-256: b9ad71d95e7e5814b2da6268ab0d749854abe3b23c7c43a93e14d223ad8e5376
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a large number of embedded URLs, many of which point to compromised websites or disposable hosting, indicating a link farm designed to lead users to malicious content. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The file's structure and URL distribution suggest it's part of a phishing campaign, likely delivered as an attachment.

Machine Learning

  • Nyx PDF Classifier clean score 0.1405

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://ilturismoinitalia.it/userfiles/files/josunolosusawomabipup.pdf In PDF document text
    • http://www.jcca.co.in/wp-content/plugins/formcraft/file-upload/server/content/files/1607bca8f1953e---15757254807.pdfIn PDF document text
    • https://anukulagrotech.com/userfiles/file/68229142719.pdfIn PDF document text
    • https://supermagnum-bg.com/userfiles/file/vuledumewebot.pdfIn PDF document text
    • https://islandsvefir.is/wp-content/plugins/super-forms/uploads/php/files/nrkgvpcljtkov4u35lj70qer62/repalafezimeg.pdfIn PDF document text
    • https://husvagnsexpo.se/wp-content/plugins/formcraft/file-upload/server/content/files/160bfb28e2dffa---luvawoxumisebuzi.pdfIn PDF document text
    • http://www.sas.edu.mn/ckfinder/userfiles/files/vebusijezexagusarukigij.pdfIn PDF document text
    • http://naucseto.cz/storage/26723464639.pdfIn PDF document text
    • https://www.stamfordtaxis.com/wp-content/plugins/super-forms/uploads/php/files/l0qct0crq5et1t134ac4qle8nj/miguxabesajanonoxenarapiw.pdfIn PDF document text
    • http://anhuishangbiao.com/upload_fck/file/2021-6-21/20210621095249302319.pdfIn PDF document text
    • http://thallo-food.hu/uploads/ckfinder/userfiles/files/91539272426.pdfIn PDF document text
    • https://www.natursany.com//ckfinder/userfiles/files/14771487067.pdfIn PDF document text
    • http://lpkgoodframeupvc.com/userfiles/files/94296518485.pdfIn PDF document text
    • https://www.westcountrystoves.co.uk/wp-content/plugins/super-forms/uploads/php/files/217070662a6a64ba732d661aebbd09ef/88358003087.pdfIn PDF document text
    • http://katheran.com/clients/55933/File/mejifozimiwem.pdfIn PDF document text
    • https://elitstroycraft.ru/source/file/30947686786.pdfIn PDF document text
    • http://www.stratcareerservices.com/wp-content/plugins/formcraft/file-upload/server/content/files/160818d2400ee6---rakunuzuvefewisakalor.pdfIn PDF document text
    • https://gmonlinestore.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d8950c8bcf9---51824939800.pdfIn PDF document text
    • http://classtool.info/upload/files/3898213531.pdfIn PDF document text
    • https://sanvexe.vn/webroot/img/files/51712217275.pdfIn PDF document text
    • http://cohn-vossen.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c35c2f3fd6b---mitotosanizadoxine.pdfIn PDF document text
    • https://loskutova.site/wp-content/plugins/super-forms/uploads/php/files/df039b6245bb0497138cf37361f11309/tigupufijozolojebavoguma.pdfIn PDF document text
    • http://akcjonariusz.com/UserFiles/file/41758463914.pdfIn PDF document text
    • http://thenext.pk/userfiles/files/595433449.pdfIn PDF document text
    • https://pacpartner.net/images_client//imagesfile/xoxusiv.pdfIn PDF document text
    • http://ucity68.com/clients/e/ea/ea220da86df44fb0ae3b7c8e8295ccc1/File/gagubipukoz.pdfIn PDF document text
    • http://samnakthodrahassob.com/userfiles/file/zanure.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BkSY9tpko7c/uplcv?utm_term=difference+between+financial+and+management+accountingPDF 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_off00012375.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12375 17388 bytes
SHA-256: 84cb3665707d3d12b9d3ddbe28972a715a263ed006bfa0c1428a7902a1527734
font_01_sfnt_off0001511e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1511E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1