Malicious PDF — malware analysis report

Static analysis result for SHA-256 5250c37cc2f6393a…

MALICIOUS

PDF

83.5 KB Created: 2021-08-23 11:32:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: ccfb02538cdcccf88bf5962337aaf280 SHA-1: 31b19855c4f70c744dd8feef9e1c580f8f6e35d3 SHA-256: 5250c37cc2f6393aec57fcf2723f5c0d6ad7de614492e212b5b064a531a88d09
156 Risk Score

Malware Insights

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

The ML classifier and ClamAV both strongly indicate this PDF is malicious. It contains numerous links pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of multiple distinct hosts and the use of disposable hosting further support a malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9991

Heuristics 6

  • 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
  • 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://www.iamgoingto1996.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a2a3d936665---zegexi.pdf In PDF document text
    • https://carpanea.it/wp-content/plugins/super-forms/uploads/php/files/1d1d7ef7da391179947a6bb9f32c3147/36405944192.pdfIn PDF document text
    • http://springswellness.net/wp-content/plugins/formcraft/file-upload/server/content/files/160725d5ee32d5---poresiludimarazo.pdfIn PDF document text
    • https://www.reliancecareuk.com/wp-content/plugins/super-forms/uploads/php/files/d07823d81494912dc79751fb99e11db0/selojufupal.pdfIn PDF document text
    • http://zadonskiy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1609f161b3f674---tanamomosujugafojex.pdfIn PDF document text
    • https://polnische-zaune.de/userfiles/file/fisogakovilixovi.pdfIn PDF document text
    • http://sarahscupcakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1611a09bc13178---20881889462.pdfIn PDF document text
    • http://peak-experience-japan.com/images/blog/file/32336686511.pdfIn PDF document text
    • https://www.lumisolar.pe/wp-content/plugins/formcraft/file-upload/server/content/files/16093a90c5ecb1---47424363904.pdfIn PDF document text
    • http://www.tsssport.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aa9b1f07bf3---bodaxabawabu.pdfIn PDF document text
    • http://tuhocxuatnhapkhau.com/uploads/ckfinder/files/52048356790.pdfIn PDF document text
    • http://www.qookspot.kitchen/wp-content/plugins/formcraft/file-upload/server/content/files/16070f4fd97c65---kiwebuwaduxe.pdfIn PDF document text
    • http://irinaburmistrova.ru/files/lezisolupijewuzase.pdfIn PDF document text
    • http://kgmda.com/upload/files/50867006658.pdfIn PDF document text
    • http://runbo.net/upfiles/files/16279996049343.pdfIn PDF document text
    • https://assignmentmart.com/ckfinder/userfiles/files/nebemeta.pdfIn PDF document text
    • http://www.esthemed.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160a2ba03c4ec4---reriladarawizin.pdfIn PDF document text
    • http://dangkyidol.com/wp-content/plugins/super-forms/uploads/php/files/696kti013ctjiggbjjvffjh8tr/gojona.pdfIn PDF document text
    • https://cvenhancer.com/wp-content/plugins/super-forms/uploads/php/files/48fa61d37413781010cbc390dc828485/vodupajug.pdfIn PDF document text
    • http://julieesteban.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b594dbed654---kaxevatolo.pdfIn PDF document text
    • http://andrelandberg.com/userfiles/file/8153640405.pdfIn PDF document text
    • http://alexanderkanevskyartistbiography.com/clientMedia/file/wesirazepitifipegapevexug.pdfIn PDF document text
    • https://luxurytravel-show.com/wp-content/plugins/super-forms/uploads/php/files/a11e71d9c736261705eaa913096ba2ad/sajadome.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=if+i+have+a+yellow+heart+on+snapchat+does+the+other+personPDF 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_off0000de30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE30 17572 bytes
SHA-256: 62aa243dc793ee069dea2a3d79f4757bcd6b733a57de34b1646d16dc1c5041d9
font_01_sfnt_off00010c0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C0F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012426.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12426 10936 bytes
SHA-256: e29820a2f9f3b399833a5dacd5a905efa9a7192fd39f49f532b14e4b66d2804e

Open this report in the interactive analyzer, or submit your own file for analysis.