Malicious PDF — malware analysis report

Static analysis result for SHA-256 308f91da06b1f8e7…

MALICIOUS

PDF

76.7 KB Created: 2021-09-05 06:30:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 18075e83ba44f2b86b61be27c697d4d6 SHA-1: 6660e4337b9565717a579ee88d8e04352ae4d78e SHA-256: 308f91da06b1f8e76f02279a301d38fdb5c88ff1622c8f45ed749c58c06d1f3b
156 Risk Score

Malware Insights

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

The PDF document contains a large number of external URIs, many of which point to compromised WordPress sites and disposable hosting. This behavior is indicative of a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly support its malicious nature.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9908

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.beadvised.co.uk/wp-content/plugins/super-forms/uploads/php/files/c8a68cdcdc050b16ade067d9bb25e15a/lomef.pdf In PDF document text
    • http://www.skk.com.hk/admin/ckfinder/userfiles/files/95444092047.pdfIn PDF document text
    • http://asirakademi.com/resimler/files/81122650751.pdfIn PDF document text
    • http://backupcenters.com/userfiles/file/xefujaluwedetedobugilu.pdfIn PDF document text
    • http://litroshaber.net/resimler/files/somad.pdfIn PDF document text
    • https://coachtourbusrental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d1877026fc---23384136047.pdfIn PDF document text
    • http://staropolski.net/Upload/file/wovoxulid.pdfIn PDF document text
    • http://vegasoft.hr/wp-content/plugins/formcraft/file-upload/server/content/files/160fcaee08aa26---96302447637.pdfIn PDF document text
    • http://good163.cn/Uploadfiles/files/venotiwokop.pdfIn PDF document text
    • http://sjanzee.nl/file/11782896473.pdfIn PDF document text
    • https://www.kcequipment.com.au/wp-content/plugins/super-forms/uploads/php/files/bbd1f9b5f6f5ff66cbccb478fa6db0b7/xeselo.pdfIn PDF document text
    • http://www.assignproject.com/wp-content/plugins/formcraft/file-upload/server/content/files/16074a92c3fe3f---punomeluda.pdfIn PDF document text
    • https://cahayaapi1.com/contents//files/gogilutotokokuf.pdfIn PDF document text
    • http://armanetti.com/images/kotuzugixizeru.pdfIn PDF document text
    • http://debsecond.net/UserFiles/File/lomazupokinusunora.pdfIn PDF document text
    • http://www.oomewatersport.nl/upload/files/geroz.pdfIn PDF document text
    • http://allprintusa.com/admin/images/file/sipafolovajijabunuto.pdfIn PDF document text
    • http://aelma.com/sites/default/userfiles/file/95930175932.pdfIn PDF document text
    • http://poketomecam.com/uploads/files/22034758344.pdfIn PDF document text
    • http://barrybusiness-crm.com/ressource/devis-photo/files/83925104380.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/tutowixonawepi.pdfIn PDF document text
    • http://www.vivelamusica.es/wp-content/plugins/formcraft/file-upload/server/content/files/16078a63924abd---50332296855.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160dcca8def7dd---3314863605.pdfIn PDF document text
    • https://miamiuniquelimo.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a288fe13c6a---kexalalemugogolax.pdfIn PDF document text
    • http://3handseg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160efd92f58b9d---95555758849.pdfIn PDF document text
    • http://karmand24.ir/basefile/ehotel724ir/files/juwukalesukusixusosezepuv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/1KS0DP0cxss/uplcv?utm_term=rointe+series+k+manualPDF 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_off0000c9d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC9D5 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e1e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE1E7 16736 bytes
SHA-256: 8a74cdc42eb6835ea30705b2419dc8fc9bb1fd3c8c33fb99188dccfc5843853f
font_02_sfnt_off00010ce0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CE0 10504 bytes
SHA-256: d27f9caf3adad4ecceb1ed0198682f6f56e2449a5b58168d10ca077563b47837

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