Malicious PDF — malware analysis report

Static analysis result for SHA-256 466fc4fb300e9616…

MALICIOUS

PDF

76.2 KB Created: 2021-09-21 00:49:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 44c7fbb38da9c0d939af224275b932aa SHA-1: 89744946f21e524d43951611f96761e14ab4885f SHA-256: 466fc4fb300e9616ebc513e6ebf50ecf9163a3f16ea3bc20b82d84d7cbff0c73
156 Risk Score

Malware Insights

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

The PDF contains a large number of embedded URLs, many of which point to disposable hosting or compromised CMS upload directories, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery via these links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9976

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://balmbeach.hometeamcorp.com/images/usr/26958908031.pdf In PDF document text
    • http://ne-moloko.ee/wp-content/plugins/super-forms/uploads/php/files/4e094f1bb34a06460b6c0c6b8474a544/vimatobodigug.pdfIn PDF document text
    • http://sunway.me/uploads/file/191230568072.pdfIn PDF document text
    • http://kabaretyimpresariat.pl/Upload/file/sadajipokomutu.pdfIn PDF document text
    • http://another-partner.morefriendship.com/upload/files/39878184736.pdfIn PDF document text
    • http://galerie45.com/userfiles/file/89517191404.pdfIn PDF document text
    • http://voszveszprem.hu/_user/file/47881319376.pdfIn PDF document text
    • https://soudureornementalelauziere.com/upload/editor/file/49901607274.pdfIn PDF document text
    • https://zifu-tech.com/app/webroot/userfiles/files/golowijusovino.pdfIn PDF document text
    • https://indianhairtransplant.com/ckfinder/userfiles/files/menugulimev.pdfIn PDF document text
    • http://diplomat2014.ru/ckfinder/userfiles/files/tidefuga.pdfIn PDF document text
    • http://www.caribbeandentist.com/wp-content/plugins/formcraft/file-upload/server/content/files/16140f2c18660b---rogezikakanibale.pdfIn PDF document text
    • http://kaitosushisb.com/uploads/files/81634228206.pdfIn PDF document text
    • https://thietbivesinhanhhuy.com/asset/files/wogazofadowob.pdfIn PDF document text
    • http://florylaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/pijewinuvebu.pdfIn PDF document text
    • https://mimpiindah88.com/contents/files/vedun.pdfIn PDF document text
    • https://amd-export.com/site/upload/file/91289643175.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ccad4d0a42---84885942893.pdfIn PDF document text
    • https://bda.ch/ckfinder/userfiles/files/gilexulufetegewozuzososib.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/susurodozorojisaxoxonujep.pdfIn PDF document text
    • http://ciatic.saintelserver.com/archivos_editor/file/9208575778.pdfIn PDF document text
    • https://nyig.com/files/file/41413805708.pdfIn PDF document text
    • https://eccdc.org/application/webroot/userfiles/file/93969310127.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/FevRqgeaUVY/uplcv?utm_term=cricket+t20+fever+3dPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c6bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6BD 17108 bytes
SHA-256: a53085101314eaf9e7f09d2d54dca57f467a370e2eff562f663c039c37f738ae
font_01_sfnt_off0000f30c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00010b23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B23 10472 bytes
SHA-256: 37e527b2666461172204c5a98c037704edb8697951b3f41c1fab174dc77eeb4d