Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b655226f2202d02…

MALICIOUS

PDF

81.4 KB Created: 2021-09-15 12:18:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 7a88028ddbd4c2a2b260eb108d1bda0b SHA-1: 13f20d75d6716066bf2830f3a1831fe897b21713 SHA-256: 2b655226f2202d02bbd90fe42160cd6316d54fc39071ac85ac15d453e4594777
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as a link farm, with many URLs pointing to compromised WordPress sites and disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or malware distribution. The embedded URLs are designed to redirect users to external sites, potentially for further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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://www.kiteschule-eckernfoerde.de/wp-content/plugins/formcraft/file-upload/server/content/files/161351f82a3b7a---4513366474.pdf In PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/1614164cc6d990---dudurowapi.pdfIn PDF document text
    • http://irinabailey.com/upload/files/jexokizuju.pdfIn PDF document text
    • http://xn----8sbfhu6ab4bqv.xn--p1ai/userfiles/file/11248197248.pdfIn PDF document text
    • http://scandirent-new.ru/uploads/assets/file/78498841992.pdfIn PDF document text
    • https://www.hs-hofgastein.salzburg.at/ckfinder/userfiles/files/39196511305.pdfIn PDF document text
    • https://northwestconvention.cz/data/files/83056898620.pdfIn PDF document text
    • http://thuocnam.xyz/images/files/nivilobaf.pdfIn PDF document text
    • http://xn----7sbakif2a3azdub.xn--p1ai/admin/ckfinder/userfiles/files/41018848239.pdfIn PDF document text
    • http://hatowo.com/app/webroot/uploads/files/60455899167.pdfIn PDF document text
    • http://qapoll.com/2015/vat/upload/files/pavelodekibekesimewofu.pdfIn PDF document text
    • http://xecuoihuyhoang.com/uploads/userfiles/file/2824315922.pdfIn PDF document text
    • https://spandoekland.nl/userfiles/file/12202574993.pdfIn PDF document text
    • http://muacuoi.vn/Pictures/files/59472543064.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/hlhn208ep1ppmoqpl5cq5pnqg0/niwuvididunoxujem.pdfIn PDF document text
    • http://xn--80aiddhbkcq5bcaz.xn--p1ai/upload/files/97619879303.pdfIn PDF document text
    • http://oneself.pro/wp-content/plugins/formcraft/file-upload/server/content/files/1613223ed12264---fofazamamitojidarat.pdfIn PDF document text
    • https://parisnordmedical.fr/docs/file/81398677673.pdfIn PDF document text
    • https://daotaolaixesontay.com/uploads/file/folizukozowimaziduguk.pdfIn PDF document text
    • https://hensuyenpqa.traigiongthuha.com/ckfinder/userfiles/files/48438060157.pdfIn PDF document text
    • https://ecoinkworld.com/wp-content/plugins/super-forms/uploads/php/files/c7683bd58fce462275a45f1ad27da79b/51991021197.pdfIn PDF document text
    • https://isleo.com/i_photos/file/89729316321.pdfIn PDF document text
    • https://tungafilm.com/dorceiys/ckfinder/userfiles/files/gonelag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=best+android+data+recovery+apkPDF 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_off0000d7e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E9 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f000.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF000 10784 bytes
SHA-256: 6ebd4ac03046b71c414ad81134a43e149c4e533d5ef3b7d8e276c0b75537ac4d
font_02_sfnt_off00010911.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10911 18224 bytes
SHA-256: 3641a37f3019a8ce990cd0ed2b909fed949685b0170c353dc72483081e0d20eb

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