Malicious PDF — malware analysis report

Static analysis result for SHA-256 f01f169e3fe19bd4…

MALICIOUS

PDF

89.5 KB Created: 2021-09-01 13:48:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 2ee49fb0f5fe4755a71b457d8916252a SHA-1: 2cd1b277254a6c30ce8e4e6e67d498dea12400cb SHA-256: f01f169e3fe19bd4e06a54724c8bf10a1b10a169b40a914f8b2e8dfe4f0bace3
156 Risk Score

Malware Insights

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

The PDF file contains numerous embedded URLs, many of which point to compromised or suspicious domains, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or distributing further malware. The presence of multiple external URIs and link farms on disposable hosting supports this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

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://barrybusiness-crm.com/ressource/devis-photo/files/39620257920.pdf In PDF document text
    • http://vdadanang.vn/app/webroot/assets/files/berogaju.pdfIn PDF document text
    • https://suhrsmad.dk/wp-content/plugins/formcraft/file-upload/server/content/files/1607787f4c9e24---49332976998.pdfIn PDF document text
    • http://skybuildinfraprojects.com/uploads/73326152618.pdfIn PDF document text
    • https://argumentua.com/i/file/41035165765.pdfIn PDF document text
    • http://hainescentreasia.com/images/file/35106626166.pdfIn PDF document text
    • http://ahzycw.com/upload_fck/file/2021-8-3/20210803134056455030.pdfIn PDF document text
    • http://massimomoroni.it/userfiles/files/78029885751.pdfIn PDF document text
    • http://mountmedpharmacy.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/16088001dddbb3---58518991713.pdfIn PDF document text
    • http://sugarfree-gelato.com/upload/file/gulutudolizukabifalu.pdfIn PDF document text
    • http://ontheedgeofnow.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609e18878f875---pilefefanavapa.pdfIn PDF document text
    • https://akdenizokullari.k12.tr/wp-content/plugins/super-forms/uploads/php/files/6kjcpsqc719ntes271dpe6mdlb/18837251712.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612f56cb6996f---wimokuvipiv.pdfIn PDF document text
    • http://chagatea.ru/wp-content/plugins/super-forms/uploads/php/files/4accfab0f96fab7ddae3e48f62345677/wegunoboregiwozujasipugur.pdfIn PDF document text
    • https://www.karenlovelee.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608b01fd143ee---jufom.pdfIn PDF document text
    • https://www.davidcosz.de/wp-content/plugins/super-forms/uploads/php/files/roequju19mnmfpgl2nhhvu94t4/10673918621.pdfIn PDF document text
    • http://grani-tonkogo-mira.ru/wp-content/plugins/super-forms/uploads/php/files/145a600a76b3bcd200f0787f69236b8c/82471040488.pdfIn PDF document text
    • https://www.ergunaygoren.com/wp-content/plugins/formcraft/file-upload/server/content/files/160753812602e9---695542364.pdfIn PDF document text
    • http://thepokeluau.com/uploads/files/43219047532.pdfIn PDF document text
    • https://mamproducciones.es/wp-content/plugins/formcraft/file-upload/server/content/files/1607c06d0b421a---dapanit.pdfIn PDF document text
    • http://pensjonatagat.pl/userfiles/file/firutixijesigivofe.pdfIn PDF document text
    • http://jarosi.hu/files/file/12881004252.pdfIn PDF document text
    • http://agrobud.net/uploaded/file/16640862794.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=1985+queen+live+aidPDF 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_off0000f63d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF63D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010e4f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10E4F 19260 bytes
SHA-256: 4fa2a07bf2093074592b3a203c51ab91b9b89640b3fe4a2be4dba7fb97976bfd
font_02_sfnt_off00013ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13FF9 10532 bytes
SHA-256: 38c29408b9bdf77c92f3d7003ce758bd7a1c44b3fa559e65394d96c6af4b517e

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