Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ca799db97cda2ce…

MALICIOUS

PDF

111.0 KB Created: 2021-06-25 21:23:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 24ae2997c1a7114caa9868e9aa926e03 SHA-1: 5f3d8d519078147246a845b25ddc875dfabddd93 SHA-256: 3ca799db97cda2ce0e6ed5c947de652decacc3a7348f9a74a231de83e428a9fc
156 Risk Score

Malware Insights

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

This PDF file was identified as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs that point to compromised WordPress upload directories and other potentially malicious content. The primary attack pattern observed is the redirection of users to external, compromised sites, likely to host further malicious payloads or phishing content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

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 https://www.hed-endo.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160a7a9313469b---zibobejivasolabuzebo.pdf In PDF document text
    • http://aranykoronakft.hu/userfiles/file/mefejukimupapa.pdfIn PDF document text
    • https://www.cittadelmiele.it/wp-content/plugins/super-forms/uploads/php/files/d5b6adec4dc1be66b0644afc63ae9645/49360981785.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/2a0b3435bcd476e5fae9175cab38c711/bopitevugepekizazaw.pdfIn PDF document text
    • https://www.couleurs-et-jardin.fr/wp-content/plugins/formcraft/file-upload/server/content/files/160ac728ab6941---juripevogowesofav.pdfIn PDF document text
    • https://easy2ticket.com/upload/files/19168977023.pdfIn PDF document text
    • https://avis-medical.ma/wp-content/plugins/super-forms/uploads/php/files/c5a9c1c1e8d7be5a5f8a6374459c9938/60703494398.pdfIn PDF document text
    • https://genesisbehaviorcenter.com/wp-content/plugins/super-forms/uploads/php/files/59a4ee077999667d89cbec7d07377866/bepipefa.pdfIn PDF document text
    • https://mattweidnerlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607939a715149---jixalabo.pdfIn PDF document text
    • http://fantalife.nl/userfiles/file/88717412226.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/fa19489f0620e6244264da93c1ecf3bc/lusegofazetufuwi.pdfIn PDF document text
    • https://www.ccps.mx/wp-content/plugins/super-forms/uploads/php/files/cdce94110570f24882512e37c8bfadc1/fudadijepemow.pdfIn PDF document text
    • http://kystop.com/wp-content/plugins/super-forms/uploads/php/files/b1ecuchrlamg72cd9jsm9edgh7/vuwatuxitalek.pdfIn PDF document text
    • http://aimic.com/userfiles/file/losulilamidumag.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/16093a497b582d---pikobojikikunaxadu.pdfIn PDF document text
    • http://www.gametimecatering.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b49bfc59811---sugunozawuzimato.pdfIn PDF document text
    • http://www.zopfitravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c8dae13c7c4---zalenebagiwomo.pdfIn PDF document text
    • http://ovartec.com/wp-content/plugins/formcraft/file-upload/server/content/files/16079a8850be6b---fatixaloketuwemuzopi.pdfIn PDF document text
    • http://www.linkkorea.co.kr/wp-content/plugins/formcraft/file-upload/server/content/files/160add4b766e58---ritajakof.pdfIn PDF document text
    • http://18554080.com/userfiles/file/32814821645.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8dd6fc657da9f87475d18579d7c0cfc/53995488909.pdfIn PDF document text
    • https://www.sblending.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606ca1dde5508---gikelukewiboniva.pdfIn PDF document text
    • http://israel-aliya.com/wp-content/plugins/super-forms/uploads/php/files/f86e8960c9d73181a0fc5e83739d059b/fikasubimemubavasobuv.pdfIn PDF document text
    • https://hagepoorter.be/files/files/lisak.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/cv9VXjIrmdE/uplcv?utm_term=combination+reaction+chemistryPDF 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_off0001506f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1506F 17392 bytes
SHA-256: 370815ef64bc431c9dc42f91b4e7662aeefa5058880afd5fa2987cee48c801e2
font_01_sfnt_off00017dd0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17DD0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000195e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x195E7 10736 bytes
SHA-256: c71c88d7b040cdf48bbde9ff0a99fe39c3e1f2f56854411f3d3c4d85bae8408b

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