Malicious PDF — malware analysis report

Static analysis result for SHA-256 06746bcddf336166…

MALICIOUS

PDF

82.7 KB Created: 2021-09-01 01:35:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: b15bf915da499919f9c1554556ad19c0 SHA-1: 717744025532f97edd525ca5f5b4786a60dbd5bf SHA-256: 06746bcddf336166bc1af2fbce4ef98b5a9ce91518f22f947a7e0f7f565ca04d
156 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document contains a link farm pointing to multiple compromised WordPress upload storage locations and other disposable hosting sites, suggesting an attempt to distribute malicious content or conduct phishing. The presence of numerous unknown URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

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 https://totalyoumovement.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac3dc8b5b7c---48127064922.pdf In PDF document text
    • http://cu-hinothai.com/ckfinder/userfiles/files/zatarisejepawogugefenopaf.pdfIn PDF document text
    • http://simoncaulkin.com/images/30462523516.pdfIn PDF document text
    • https://prana.video/wp-content/plugins/super-forms/uploads/php/files/hln2d2ol4dsa3umgpntk36rhv3/95611860213.pdfIn PDF document text
    • https://perfecthospitals.org/ckfinder/userfiles/files/moratosexinotupexema.pdfIn PDF document text
    • https://connect.allianceflooring.net/wp-content/plugins/super-forms/uploads/php/files/2a8e12b0065595cf8a2a07e3fa9272fc/wufej.pdfIn PDF document text
    • http://neurooperations.com/ckfinder/userfiles/files/dubeguxuxekafumewabemurup.pdfIn PDF document text
    • http://sushikyototogo.com/uploads/files/63187774155.pdfIn PDF document text
    • http://sitepride.com/clients/c/c8/c8c605999f3d8352d7bb792cf3fdb25b/File/gadifarawibidojudatazo.pdfIn PDF document text
    • https://otdelkamos.ru/wp-content/plugins/super-forms/uploads/php/files/f65c47e17bea132f4e06191119b7c082/88598954089.pdfIn PDF document text
    • http://www.photobreak.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160723a109739c---posuwibovusekibegup.pdfIn PDF document text
    • https://drmarlenebothma.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16096d8a6171c6---40682571438.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210630091312.pdfIn PDF document text
    • http://kitpaisal.com/mypicture/file/dijiwesunowi.pdfIn PDF document text
    • http://www.alexgis.com/siteuploads/editorimg/file/litupomomerunapupojevidar.pdfIn PDF document text
    • http://digitalpolicycouncil.com/imagenes/file/33888521885.pdfIn PDF document text
    • http://dulwichtaxi.com/survey/userfiles/files/38920796788.pdfIn PDF document text
    • https://equantumconsulting.com/files/files/51925867162.pdfIn PDF document text
    • http://www.fsnn.se/wp-content/plugins/formcraft/file-upload/server/content/files/1607be1486bbc0---65179899054.pdfIn PDF document text
    • https://samyenngochoang.com/wp-content/plugins/super-forms/uploads/php/files/4hl5c99g6nv4jq3hnai2msed6h/37355670792.pdfIn PDF document text
    • http://www.hcibatiment.fr/wp-content/plugins/formcraft/file-upload/server/content/files/1612ae4cfab1af---womilowagenasonoben.pdfIn PDF document text
    • https://noihoithanhtuan.com/media/ftp/file/bifok.pdfIn PDF document text
    • https://www.lindopoint.it/wp-content/plugins/super-forms/uploads/php/files/71ccd237dd1b21c09dd0909eda0311c3/72248687477.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/3CAf4wW3hvY/uplcv?utm_term=icebreaker+questions+would+you+ratherPDF 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_off0000de89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDE89 11096 bytes
SHA-256: 9bedee26fc46c3f8f931aa6714fe3f8f45e11e3b1ad64de518a37b25ead37826
font_01_sfnt_off0000f834.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF834 16968 bytes
SHA-256: cbbf31b0cb523bb4d056f90c5b045a7930207792af3a1a39113b848103929fae
font_02_sfnt_off00012400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12400 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1