Malicious PDF — malware analysis report

Static analysis result for SHA-256 299c4bc77ed47891…

MALICIOUS

PDF

89.5 KB Created: 2021-07-09 04:49:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 7a0f3f700e937c9d8629dfddead544a9 SHA-1: 3c5020f9ade24b36abd91097957769d381cf2a21 SHA-256: 299c4bc77ed478913524e5cf65675ed6a54a5924b42d9a6daa0b0049c72f5b89
156 Risk Score

Malware Insights

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

This PDF was flagged by multiple heuristics and an ML classifier as malicious, with ClamAV identifying it as a phishing trojan. It contains numerous links pointing to compromised WordPress sites and other disposable hosting, suggesting a link farm designed to redirect users to malicious content. The file's structure and embedded links indicate it's likely part of a phishing campaign or a distribution vector for further malware.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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://baharemadinah.com/wp-content/plugins/formcraft/file-upload/server/content/files/160864c4e72198---fexirodojileza.pdf In PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/dbe7b13c0e3612bd8bc5500732a65489/45574252419.pdfIn PDF document text
    • https://senzedigicraft.com/wp-content/plugins/super-forms/uploads/php/files/1d02d7af6a8f152c2e80566a2337db45/33824534598.pdfIn PDF document text
    • https://autoschiller.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609cc070e1fe5---32840068682.pdfIn PDF document text
    • https://rmp-traueranzeigen.de/cms/files/53995013028.pdfIn PDF document text
    • http://accessibilite-salle-eau.com/ckfinder/userfiles/files/57445229313.pdfIn PDF document text
    • https://www.rogierstoel.nl/wp-content/plugins/super-forms/uploads/php/files/v1bdijg6pdcq0cun05ogo9j0qi/wasafutanilevix.pdfIn PDF document text
    • http://hurtowniagrafit.pl/userfiles/file/wirixekimowepamemile.pdfIn PDF document text
    • https://www.asahinafunnels.com/wp-content/plugins/super-forms/uploads/php/files/4t7qetf4dp2ugl29edb6l5r0fp/sezotejitibirekalakanazew.pdfIn PDF document text
    • http://www.mywil.ch/wp-content/plugins/formcraft/file-upload/server/content/files/16094882d9cb47---jarasewogajora.pdfIn PDF document text
    • http://mobilenmr.com/files/files/11400541383.pdfIn PDF document text
    • http://www.putnamtaxi.net/wp-content/plugins/formcraft/file-upload/server/content/files/1609295487eadb---fajedamud.pdfIn PDF document text
    • http://bulk-supplies.com/userfiles/file/sajizi.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a596d023132---fokanivirukijobewat.pdfIn PDF document text
    • https://fermuar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac698484982---xegabakokawutoxifaronol.pdfIn PDF document text
    • https://spaslask.pl/wp-content/plugins/super-forms/uploads/php/files/i62i13mq568jac1g0k578vle0d/zererulelexubumo.pdfIn PDF document text
    • https://callhfelectric.com/wp-content/plugins/formcraft/file-upload/server/content/files/160747befc7643---gipuw.pdfIn PDF document text
    • http://dansecyr.ca/pdf/file/55056901293.pdfIn PDF document text
    • https://www.projectorrentals.com/wp-content/plugins/formcraft/file-upload/server/content/files/16080d9b325acd---4437982615.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/hniv6j9ia0jusj45bvme3c5el3/belasatopemojamaxisale.pdfIn PDF document text
    • http://pansophers.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607c0f54f1c05---1518072400.pdfIn PDF document text
    • https://www.ideaklinikbakirkoy.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608bc052e05e9---85895628731.pdfIn PDF document text
    • http://ipsgroupjjn.org/userfiles/file/zivanadevapipenogumiton.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/6naE_Nh8_CY/uplcv?utm_term=clearing+my+throat+too+muchPDF 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_off0000fe04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFE04 16444 bytes
SHA-256: 1c51ea6acb63bab31879a4f2452d3e4e01a736e92104bbcb939afa3e88450e62
font_01_sfnt_off00012850.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12850 10752 bytes
SHA-256: 8af8978decae0a2f8168e3ce1d2d5d4af2df3c5528881457fbb8ebb456d69772
font_02_sfnt_off000140e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x140E7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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