Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e613bb15057a798…

MALICIOUS

PDF

655.7 KB Created: 2021-06-16 07:38:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 339b3353f26aa467bd61c3170bf72905 SHA-1: cb9bace107d8d37e40642ab363b9cabfed53c5af SHA-256: 4e613bb15057a79804ad580fd3bac5e1011ba7ca2b6f2031241673f18f753d6e
94 Risk Score

Malware Insights

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

The PDF file contains multiple links to compromised WordPress sites, suggesting it is used for phishing or malware distribution. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports its malicious nature. The embedded URLs likely lead to a second-stage payload or phishing page, indicating exploitation for client execution.

Machine Learning

  • Nyx PDF Classifier clean score 0.0630

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
  • 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.
  • 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://synerhu.ru/uplcv?utm_term=3d+pool+ball+gold+and+chips+generator PDF link annotation
    • https://www.bluegreenshouseboats.in/wp-content/plugins/formcraft/file-upload/server/content/files/16074bfcbcb8cb---lukegijikinexe.pdfIn PDF document text
    • https://kuechentreff-schmid.de/wp-content/plugins/super-forms/uploads/php/files/sdk36fhn9q8bf5496897a12j6k/4665222071.pdfIn PDF document text
    • http://adria-ex.com/images/blog//file/6568582144.pdfIn PDF document text
    • http://prmakeup.com/Image/files/lojodukubuvedalalu.pdfIn PDF document text
    • https://nanyangtextile.com/userfiles/file/nenoxuburawojesujemik.pdfIn PDF document text
    • https://solarconsulting.org/wp-content/plugins/super-forms/uploads/php/files/46c356e641ba7741ca2757ab61e8eca6/94012851640.pdfIn PDF document text
    • http://smartmedicaleg.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a9e7fb5089b---76431765954.pdfIn PDF document text
    • http://www.fullmooneye.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f268f3c010---12328822688.pdfIn PDF document text
    • http://anhuifan.com/upload_fck/file/2021-5-13/20210513012310767964.pdfIn PDF document text
    • https://schreinerheusi.de/wp-content/plugins/formcraft/file-upload/server/content/files/16085645d4a6cb---29982112352.pdfIn PDF document text
    • http://workcoop.org/fckeditor/userimages/file/20210614193626.pdfIn PDF document text
    • https://bevillelecomte.ovh/ckfinder/userfiles/files/rezetutabupopebojituje.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/a685407b17983adfbf71bf05e4a21bbb/28539241231.pdfIn PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/160832b07678d2---buwegalafuxezigisiwegi.pdfIn PDF document text
    • http://www.radiopopiatej.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c92ecf24578---7350010457.pdfIn PDF document text
    • http://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/160a0efc1d7df6---revepepel.pdfIn PDF document text
    • https://microfocus-realize2020mea.com/wp-content/plugins/super-forms/uploads/php/files/40719f25a40e5a717aa54ad090d5b0b9/18016620281.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/70dfb6c5743397785488e8e46a31c3d1/pupenuguzukezikoriraxisim.pdfIn PDF document text
    • https://inclinedigital.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c4e490b90de---navon.pdfIn PDF document text

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_011_off000788ed.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x788ED 243843 bytes
SHA-256: d24fe474f5362bdd602b0b256103cbb3064c1b07b9e65308a8d964145408dd62

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