Malicious PDF — malware analysis report

Static analysis result for SHA-256 ebefd894f66599ab…

MALICIOUS

PDF

81.9 KB Created: 2021-09-23 04:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: cade447b59d3e96578b6605274454601 SHA-1: 6b7704a437e021cf922225bf3f13db6fa79ef801 SHA-256: ebefd894f66599abcb1a21238f2da6efc10f9c4cefe19031358311d426ed0037
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file was detected as a malicious PDF by ClamAV and an ML classifier. It contains numerous links pointing to compromised websites and disposable hosting, indicating a phishing or malware distribution attempt. The PDF structure and embedded links suggest it's part of a link farm designed to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

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 http://agro-partner.com/Image/files/12247262856.pdf In PDF document text
    • http://gf-location.fr/wp-content/plugins/formcraft/file-upload/server/content/files/16134aed0700e1---sapazotituf.pdfIn PDF document text
    • https://bruceautoservice.com/files/file/58134167160.pdfIn PDF document text
    • https://klingende-zeder.de/wp-content/plugins/formcraft/file-upload/server/content/files/161379da657c63---39497272988.pdfIn PDF document text
    • http://nail-free.com/ckfinder/userfiles/files/foluv.pdfIn PDF document text
    • http://cedresarquitectura.com/wp-content/plugins/formcraft/file-upload/server/content/files/161328e3898fef---xesejezakapen.pdfIn PDF document text
    • http://sochi-vitrazhi.ru/ckfinder/userfiles/files/64327551337.pdfIn PDF document text
    • http://shesob.com/file/files/59966287934.pdfIn PDF document text
    • http://hb1004.com/userData/board/file/kegitinorixew.pdfIn PDF document text
    • https://laneopx.com/wp-content/plugins/formcraft/file-upload/server/content/files/16138127d8076a---ximexamanowepaw.pdfIn PDF document text
    • https://cruiseship.cruises/wp-content/plugins/super-forms/uploads/php/files/4gbdbkt17er4e91cudmdlaidhk/72500240758.pdfIn PDF document text
    • http://casadiriposomarsala.it/userfiles/files/93624420898.pdfIn PDF document text
    • http://guowangcable.com/d/files/88290804685.pdfIn PDF document text
    • http://lagunaapartman.hu/images/user/file/16839339265.pdfIn PDF document text
    • http://beautybybelief.com/admin/images/file/58388424830.pdfIn PDF document text
    • http://optimaglobal.net/ckupload/files/2195359268.pdfIn PDF document text
    • http://loca-granderoue-montaletang.com/ckfinder/userfiles/files/95582247689.pdfIn PDF document text
    • https://almuhja.ps/ckfinder/userfiles/files/sibixukiserojaponuditi.pdfIn PDF document text
    • https://mycocoa.org/images/upload/files/sirugodofumofonivoxatopa.pdfIn PDF document text
    • http://alothongtin.com/upload/FCK/file/mapomerenenazoza.pdfIn PDF document text
    • http://inwama4.vn/webroot/img/files/29204513749.pdfIn PDF document text
    • http://d-a-s.cn/userfiles/file/mifinolepababej.pdfIn PDF document text
    • https://oilbasaro.com/web/images/ckfinder/files/20210909062428.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=android+dosya+y%C3%B6neticiPDF link annotation
    • http://cluster006.ovh.net/~greeters/namur/ckfinder/userfiles/files/kikadibijuf.pdfIn PDF document text
    • 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_off0000dab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAB3 18416 bytes
SHA-256: eb95f3b7dbf1291b7697bad6a34b00e345ec23abc9ab9767b24f10f3758743b9
font_01_sfnt_off00010803.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10803 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0001201a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1201A 10624 bytes
SHA-256: dbb07844004fe1f10d10c64022ce14515eb816e97c9d7facefdc3e1aa13c8cd6

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