Malicious PDF — malware analysis report

Static analysis result for SHA-256 5147fb254e5a0dd7…

MALICIOUS

PDF

87.1 KB Created: 2021-09-01 07:45:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 4807f2d32711221c0386033e9d7054c1 SHA-1: 7ac8e719a5ce046f64dcb750edc891d07ff0cb64 SHA-256: 5147fb254e5a0dd7e15e3553683da7ff3ca16b79cbbeaac76e18ad411f9b51e6
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links pointing to compromised WordPress sites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were explicitly extracted, the PDF structure and URL patterns are indicative of malicious activity.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

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://titadoorbinhduong.com/upload/files/71016727641.pdf In PDF document text
    • https://centar-znr-zop.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160af9283c73dc---sexebajipowoju.pdfIn PDF document text
    • http://www.sunarmisir.com.tr/wp-content/plugins/super-forms/uploads/php/files/4nhm2d6nobhvr0qepran7ms397/luganivog.pdfIn PDF document text
    • http://xn--80aaeiengkwpz6p.xn--p1ai/pub/file/37291542041.pdfIn PDF document text
    • http://codemessaging.net/ckfinder/userfiles/files/57038100352.pdfIn PDF document text
    • http://jagatjyotischool.org/jagatjyotischool/userfiles/file/vesogufapuxatisiw.pdfIn PDF document text
    • http://adaviestransportltd.com/userfiles/file/zujomaxunaranafagume.pdfIn PDF document text
    • http://www.cafeinca.com/img/public/contenido/file/76907827485.pdfIn PDF document text
    • http://kursadowicz.pl/Upload/file/21950767351.pdfIn PDF document text
    • http://maslag.eu/userfiles/file/pixamifod.pdfIn PDF document text
    • http://onnetsolution.in/userfiles/file/80650653445.pdfIn PDF document text
    • http://absolutelyneon.com/userfiles/file/85969719015.pdfIn PDF document text
    • http://jjinline.org/file_upload/file/juminufojebovazoragik.pdfIn PDF document text
    • https://qualitycountscleaning.com/wp-content/plugins/super-forms/uploads/php/files/9b068bda210a8762ce606ffdf123d629/kineje.pdfIn PDF document text
    • http://elyriahigh1974.org/clients/0/05/052ab20d644b737728595af1a47b4450/File/vogike.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a5e4f451916---fegeluwuserawu.pdfIn PDF document text
    • http://szilasfood.hu/pic_upload/files/subesav.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/160919282b563c---81753128763.pdfIn PDF document text
    • http://sonnenheizungen.ch/fckeditor/editor/images/file/38370017115.pdfIn PDF document text
    • http://wonikquartz.com/upload/editor/file/1627319926.pdfIn PDF document text
    • https://www.xcelsus.de/wp-content/plugins/formcraft/file-upload/server/content/files/160af9589af4f8---43022631753.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/1608b4827a7c77---tadipiramodirogare.pdfIn PDF document text
    • https://t4g.nasscomfoundation.org/wp-content/plugins/super-forms/uploads/php/files/8d25tgdq4sb7h8cr5kfk83s4i7/sefageje.pdfIn PDF document text
    • http://china-engine.net/ckfinder/userfiles/files/49665898901.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/S30rS-6n6vg/uplcv?utm_term=how+to+fix+damaged+sd+card+on+androidPDF 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_off0000ea41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEA41 10952 bytes
SHA-256: f25d8f50aae4fe6b887e163db6d9c6b3112389ea77a9d83219bc798d876f1af8
font_01_sfnt_off00010376.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10376 19320 bytes
SHA-256: 5dfbf9d5294e3c776bd4c1221a64c31b4a7c2d0b1c0c7ff1a5c6b62efe3c8350
font_02_sfnt_off000135c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x135C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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