Malicious PDF — malware analysis report

Static analysis result for SHA-256 c345bcee5d832df4…

MALICIOUS

PDF

62.0 KB Created: 2021-09-18 02:45:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 19ae3f49c7b485a9744cb96f884c2c13 SHA-1: 2e2bc9c3520bd76a559092880cf65307ef3cb461 SHA-256: c345bcee5d832df4cf59fd273650efa1390aa3ad48f018748b12e13519976d4a
124 Risk Score

Malware Insights

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

The PDF was flagged by multiple heuristics, including a critical ClamAV detection for 'Pdf.Phishing.Trojan'. The presence of numerous embedded URLs pointing to a link farm suggests a phishing or malware distribution attempt. The PDF_SEO_DISPOSABLE_LINK_FARM heuristic indicates a tactic to obscure the true destination by using many distinct, low-reputation domains.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7193

Heuristics 4

  • 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
  • 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://cicadit.ro/UserFiles/file/49544819811.pdf In PDF document text
    • http://suliaok.com/v15/Upload/file/2021918519126681.pdfIn PDF document text
    • http://www.culturehousesun.org/photos/file/14646915684.pdfIn PDF document text
    • http://kindervakantieweekdeurne.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613340b2e131f---tafujujunu.pdfIn PDF document text
    • http://zap-interactive.com/uploads/files/vunomiz.pdfIn PDF document text
    • http://aybar-gallery.com/userfiles/files/gezuzesafirijeda.pdfIn PDF document text
    • http://pinedafoundation.org/imageuploads/file/52906995097.pdfIn PDF document text
    • http://beetsom.com/PROGRAM_FCKeditor_UserFiles/file/754293851613027a315bfd.pdfIn PDF document text
    • http://nissanotogovap.vn/uploads/images/files/33463360709.pdfIn PDF document text
    • https://leise.ru/admin/ckfinder/userfiles/files/vavifa.pdfIn PDF document text
    • http://zafirkort.com/uploads/files/1996602685.pdfIn PDF document text
    • http://servicedental.it/userfiles/files/pagojisolesanoriru.pdfIn PDF document text
    • https://xinpayflow.com/ckfinder/userfiles/files/vamifomugakawag.pdfIn PDF document text
    • http://pr-jam.com/ckfinder/userfiles/files/1548128574.pdfIn PDF document text
    • http://nwatchonline.net/userfiles/file/janejeguvamotesiboredapof.pdfIn PDF document text
    • https://tlproduct.com/userfiles/file/kugiviredate.pdfIn PDF document text
    • http://flixgolf.com/ckeditor/ckfinder/userfiles/files/periluvem.pdfIn PDF document text
    • http://sergeybazarov.ru/file/65693648617.pdfIn PDF document text
    • http://gowowdeli.com/uploads/files/78123512193.pdfIn PDF document text
    • http://tehla.eu/userfiles/file/55264948395.pdfIn PDF document text
    • http://afro-safari.com/upload/files/10874650296.pdfIn PDF document text
    • https://realxenon.ru/uploads/files/32764962598.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/37874451746.pdfIn PDF document text
    • http://nenkin-t.com/upload_img/ck/files/3038006871.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/YTWXjIUwRh0/uplcv?utm_term=how+to+make+an+mp3+from+a+videoPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d1c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD1C9 10852 bytes
SHA-256: c56e58077ddb8043d993a78a3add7d8c30c5888b5c0021537ae3c28b7842b5c6

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