Malicious PDF — malware analysis report

Static analysis result for SHA-256 47f304f08ba7e8a5…

MALICIOUS

PDF

86.4 KB Created: 2021-09-24 08:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 92487e237b074994a42877055bae3b5d SHA-1: afdfd5f0a97cd67f5d2c8c80a234010f35abc9e2 SHA-256: 47f304f08ba7e8a5ac7e573386da3f1d624fcab9a669612b531d12ea41396811
156 Risk Score

Malware Insights

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

The file is a PDF identified as malicious by ClamAV and an ML classifier. It contains numerous links, many pointing to compromised CMS upload directories or disposable hosting, indicating a link farm designed to redirect users. The presence of multiple PDF_SEO_DISPOSABLE_LINK_FARM and PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM heuristics strongly suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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://bonvoyageindia.in/ckfinder/userfiles/files/55460038624.pdf In PDF document text
    • https://karlholmbygg.se/UserFiles/files/75717172611.pdfIn PDF document text
    • https://tarsiman.ee/files/file/38089284392.pdfIn PDF document text
    • https://cultureresortpokhara.com/assets/userfiles/files/16346485719.pdfIn PDF document text
    • https://oriental-kitchens.com/userfiles/files/foxelogokagagavonavo.pdfIn PDF document text
    • https://strategieb2b.com/userfiles/file/1043283751.pdfIn PDF document text
    • https://manage3.realtourvision.com/rtv/ckfinder/userfiles/images/files/xidekigivo.pdfIn PDF document text
    • http://donleroy.net/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/numokitajaza.pdfIn PDF document text
    • http://househouse.it/userfiles/files/retonemuj.pdfIn PDF document text
    • http://cesnek-vysocina.cz/UserFiles/File/41622546255.pdfIn PDF document text
    • http://missteenqueenuk.com/userfiles/file/zejivifipapi.pdfIn PDF document text
    • http://qcfloor.com/userfiles/file/mekumizokizuvugitipu.pdfIn PDF document text
    • https://californiaoptionsrealestate.com/wp-content/plugins/super-forms/uploads/php/files/9cfe74cf36e1d04b77a2e17712bb0cc0/65225944190.pdfIn PDF document text
    • http://maulich.vn/attachment/files/mimigatusedixu.pdfIn PDF document text
    • https://pointwebhost.com/calisma2/files/uploads/22249335122.pdfIn PDF document text
    • https://www.wizzfizz.com.au/application/third_party/ckfinder/userfiles/files/52402487228.pdfIn PDF document text
    • http://asirius.su/wp-content/plugins/super-forms/uploads/php/files/a8647baafd6dd593d536a3192f723e70/kedodoxadorob.pdfIn PDF document text
    • http://inteko-tula.ru/f/file/pirufevesorapevigaxofa.pdfIn PDF document text
    • http://custom-mugs-factory.com/uploadfile/files/jagatusivalebebasek.pdfIn PDF document text
    • http://tidomusica.com/uploads/files/202109222033583659.pdfIn PDF document text
    • http://xn--80akij1ajew.xn--p1ai/wp-content/plugins/formcraft/file-upload/server/content/files/1613688ec3712e---87703670641.pdfIn PDF document text
    • http://madonnina.info/userfiles/files/tukesisodomuniji.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=watch+class+of+92+full+time+online+freePDF 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_off0000ec4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC4D 10980 bytes
SHA-256: ef6880ec8ae361bde28465beb74c09e6a9dc2da2bb2fb963660f5131188d87e7
font_01_sfnt_off000105bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x105BB 17560 bytes
SHA-256: 72bae9cada94c34b0d0e6e786bff4fc5650df4a8525c938c93c8a3ce652bd376
font_02_sfnt_off000133d2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x133D2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1