Malicious PDF — malware analysis report

Static analysis result for SHA-256 250b3df2d0ef92b1…

MALICIOUS

PDF

80.1 KB Created: 2021-06-27 15:29:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: f44c467908c79f192b29bb3d5fd05913 SHA-1: bca50010b316ad53856eb658b4f5febb3c05719a SHA-256: 250b3df2d0ef92b1ee1984230c238e0e99d5277ebc7a1d95370ca9df5c2ffc49
156 Risk Score

Malware Insights

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

This PDF was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning model. It contains numerous links to compromised WordPress sites, specifically pointing to PDF files within formcraft plugin upload directories. These links likely serve as a lure to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9952

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.zaantraining.nl/wp-content/plugins/formcraft/file-upload/server/content/files/16084a02a4e175---pizumaxebugozuvin.pdf In PDF document text
    • https://stillwaiting.org/userfiles/file/95405485604.pdfIn PDF document text
    • http://host.keraladreamhomes.com/~viswabrahmathach/admin/fckeditor/editor/filemanager/connectors/php/userfiles/file/bulazezunevinodurusegal.pdfIn PDF document text
    • http://www.thediethub.in/wp-content/plugins/formcraft/file-upload/server/content/files/160a9554840543---46162878383.pdfIn PDF document text
    • https://realimpacto.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16094b73927e8e---zevelukopupaxalixawezog.pdfIn PDF document text
    • https://www.frankcapassoandsons.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ba246d04ebd---19750196953.pdfIn PDF document text
    • https://www.psalighting.com/wp-content/plugins/super-forms/uploads/php/files/0136a8c6aa6fa8a2f0a78cd74fd0bc32/rotetubikawirewazirevati.pdfIn PDF document text
    • https://machnik.net/ckfinder/userfiles/files/86309823744.pdfIn PDF document text
    • https://pfgmm.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/1606cdd7297087---zifawapapabemaketufaxi.pdfIn PDF document text
    • http://paintingservicesonline.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160a73e5e2f1c9---badimurafakuloli.pdfIn PDF document text
    • http://andrewsexes.org/clients/867461/File/lubewi.pdfIn PDF document text
    • https://baxsporthorses.com/userfiles/file/7960911874.pdfIn PDF document text
    • https://bonafideonline.com.ar/wp-content/plugins/super-forms/uploads/php/files/814b2862b2bd3fc6d1813e73e00cbc8a/dituwegilamiwotetetexixam.pdfIn PDF document text
    • https://amalighting.com/wp-content/plugins/super-forms/uploads/php/files/c40e9b470b8f76eb3a9968c60630d56c/vurazobazuzasuzifi.pdfIn PDF document text
    • https://dipinkrishna.com/wp-content/plugins/formcraft/file-upload/server/content/files/160706b9bbe935---finuludodeduzadajafuz.pdfIn PDF document text
    • https://www.ideakliniksisli.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609faa2206d44---mufozajexokimodawila.pdfIn PDF document text
    • http://pechati-piter.ru/userfiles/file/jigiwofepal.pdfIn PDF document text
    • http://www.peopleoftheheath.com/wp-content/plugins/formcraft/file-upload/server/content/files/160944b27a85c0---34655477851.pdfIn PDF document text
    • http://www.majorisinvestimentos.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160aecf4d8d0fa---rilijowarid.pdfIn PDF document text
    • https://apoc.com.au/wp-content/plugins/super-forms/uploads/php/files/5b4845be230906777045515595b4632b/83893489722.pdfIn PDF document text
    • http://domplus.su/userfiles/files/bizefezofoxovipuwivi.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/20105244183.pdfIn PDF document text
    • http://���etcherpenney.net/multimarkdown/In PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/cv9VXjIrmdE/uplcv?utm_term=what+is+mmdPDF 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000cd3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD3A 17504 bytes
SHA-256: dac7a92770e89d4bbe64d7e0761ee16b9edf63a31a58f577760df553fa00570b
font_01_sfnt_off0000fab3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFAB3 10004 bytes
SHA-256: 21691d3d7ec7eb7dcde3f72581aafb457233f7b3a08bd1ff4a0e9ecc8e98f9c1
font_02_sfnt_off000110e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x110E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_03_sfnt_off000128ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x128EF 2328 bytes
SHA-256: 5b3120ed5b607dde25b44c5d179b1649874b8c06cf9713d5470c86e62e5bec0e

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