Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fd1d7dd2133ab2c…

MALICIOUS

PDF

80.4 KB Created: 2021-03-02 04:57:26 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 0bdf03b3eb6abf8d89e901824e9ffaf7 SHA-1: 63fd73bdaf504d252f6a62cc0e8a1c611cbaddf3 SHA-256: 4fd1d7dd2133ab2cdee6e0bf7d1abba7018fab2926fce5c1184bf658bce57b53
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains numerous embedded URLs, with a primary URL pointing to 'https://midufefew.ru/wix?keyword=sat+dates+2020+august'. Heuristics indicate this PDF is part of a link farm on disposable hosting, suggesting a phishing or malicious redirection attempt. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://midufefew.ru/wix?keyword=sat+dates+2020+august PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4369317/normal_5fc931109ad8f.pdfIn PDF document text
    • https://cdn.sqhk.co/xiwasazafu/li9bie6/pewovogotuxu.pdfIn PDF document text
    • https://bulurumuz.weebly.com/uploads/1/3/1/1/131163623/gijuxikap_gosobopijif.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4424043/normal_5ffa3d55bcc71.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4418370/normal_60302e2b3cc87.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424043/normal_60356bb52e70e.pdfIn PDF document text
    • https://cdn.sqhk.co/gilubibawi/hjbifhd/sword_of_chaos.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486221/normal_5fd2d01d5768f.pdfIn PDF document text
    • https://cdn.sqhk.co/nubokeso/BHhgFiS/best_free_flight_tracker_app_2020.pdfIn PDF document text
    • https://vugesajovor.weebly.com/uploads/1/3/4/2/134265649/4826c09bad6f.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4448750/normal_5ff5b867a056d.pdfIn PDF document text
    • https://cdn.sqhk.co/madufuxenuw/jfhdDgj/cosmos_flower_plant_images.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375087/normal_6023d05da2e87.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fabodatutowew.epizy.com/lenovo_y410_bios_update.pdfIn PDF document text
    • http://bizuwututemi.rf.gd/kasated.pdfIn PDF document text
    • http://genenapukiral.epizy.com/34284854183.pdfIn PDF document text
    • http://kalujagemivinid.epizy.com/55865815160.pdfIn PDF document text
    • https://s3.amazonaws.com/fatikonavori/best_rated_convection_toaster_oven_2020.pdfIn PDF document text
    • https://s3.amazonaws.com/gonasidupij/clasificacion_de_empresa_segun_su_forma_juridica.pdfIn PDF document text
    • 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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fde2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDE2 5244 bytes
SHA-256: 16cffd2c95e684dca70722d6ae7b2e8b8c676059a597137ccd2f4677235dca1d
font_01_sfnt_off00010fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FC4 10692 bytes
SHA-256: 3abe84f3c864c594a5c899e8f9e1fa84fec49d0bc4aa8bc52d46a625b7c1f767

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