Malicious PDF — malware analysis report

Static analysis result for SHA-256 0276d2a8827c6246…

MALICIOUS

PDF

63.6 KB Created: 2021-07-02 00:50:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: ab2cdfdf33ccc15cbef85938d9dcc161 SHA-1: bb6082667a306c5b6f35dbec79aacd8157d3cb71 SHA-256: 0276d2a8827c62467a46cb30129938335194a3f4c023d0391cf7636ec51ca130
154 Risk Score

Malware Insights

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

The PDF contains numerous links pointing to compromised WordPress sites, specifically within form upload directories. These links lead to other PDF files, suggesting a link farm designed to obscure the ultimate destination. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6819

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://ceadersvalet.com/wp-content/plugins/formcraft/file-upload/server/content/files/160819c40f0aed---38099414780.pdf In PDF document text
    • http://www.cargeacrew.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/1609711603cb83---rinuzasanesomenorilo.pdfIn PDF document text
    • http://re-view.online/fckFiles/file/rajoge.pdfIn PDF document text
    • https://atlasautoglass.com/wp-content/plugins/formcraft/file-upload/server/content/files/160769351982b5---viguxaxijaxefixipo.pdfIn PDF document text
    • https://www.brunosistemi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16088e07cdbb26---gozirokepevaxovazomeser.pdfIn PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d7cf2156f9---pilenuwejilotugedukol.pdfIn PDF document text
    • http://www.vitrierbxl.be/wp-content/plugins/formcraft/file-upload/server/content/files/16070bed2d759b---tinijovizanopen.pdfIn PDF document text
    • https://www.teppiche-waschen-hamburg.de/wp-content/plugins/formcraft/file-upload/server/content/files/160b89463445fa---68267752927.pdfIn PDF document text
    • http://www.stockholmswingallstars.com/wp-content/plugins/formcraft/file-upload/server/content/files/160880440e944b---43521217517.pdfIn PDF document text
    • http://csc-021.com/userfiles/file/20210623145055_v5cu6l.pdfIn PDF document text
    • https://www.kadinlarsitesi.org/wp-content/plugins/formcraft/file-upload/server/content/files/1607d3dda3956c---robirigaruz.pdfIn PDF document text
    • http://pleasanthillpchurch.com/clients/5/55/55aa087cacc886b2254ddcc242c0699b/File/19838894862.pdfIn PDF document text
    • http://berallebags.com/UploadFiles/FCKeditor/20210512033058.pdfIn PDF document text
    • http://bascobrunswick.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160a27b2cbd1a1---lokefajujigikaketimuk.pdfIn PDF document text
    • https://rhythmcprandfirstaid.com/wp-content/plugins/super-forms/uploads/php/files/d931ea95d753448fb8db4a3682a116b1/muluvoz.pdfIn PDF document text
    • https://krono-original.vn/Images_upload/files/nexub.pdfIn PDF document text
    • http://bugaboo-buffalo.eu/UserFiles/File/60841724962.pdfIn PDF document text
    • https://laser-arena.ch/wp-content/plugins/formcraft/file-upload/server/content/files/160913b32a9713---3766526953.pdfIn PDF document text
    • https://ensasoft.com.tr/wp-content/plugins/super-forms/uploads/php/files/liibv7gpeoklnkgcvtcj5hrub8/tedenufi.pdfIn PDF document text
    • https://karinbentum.nl/uploads/file/24532057346.pdfIn PDF document text
    • http://jamoncup.es/wp-content/plugins/formcraft/file-upload/server/content/files/160765068400b0---sarozonisusudepaxewa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/A3Ryygt5BCM/uplcv?utm_term=best+app+to+watch+downloaded+movies+on+androidPDF link annotation
    • https://bxthirteen.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/52f7b03f8d7443499a24df777ea9b2ae/dadakuwamerudone.pdfIn PDF document text

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