Malicious PDF — malware analysis report

Static analysis result for SHA-256 584669dea9643469…

MALICIOUS

PDF

68.3 KB Created: 2021-08-02 22:27:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: d52f88e293feae25157ce2086886f257 SHA-1: 0b91f7959ca6cd78e123eecb3f5d7568014c6a9a SHA-256: 584669dea964346924b5bc1141db69872e865772f64ef2885d7f181a601a16e9
154 Risk Score

Malware Insights

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

The PDF document contains a link farm that directs users to multiple websites, many of which are hosted on compromised WordPress installations or disposable domains. The ClamAV detection and ML classifier indicate a high likelihood of malicious intent, likely phishing or malware distribution through these linked sites. No scripts were extracted, and the document body was unreadable binary data.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7182

Heuristics 5

  • 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
  • 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://xn----8sbaavnccwq4am.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/41c62cd0d16e03958eb95e9112a582ed/widevabekuzipadonofonowus.pdf In PDF document text
    • https://www.cedicar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d697c10df1b---12567004934.pdfIn PDF document text
    • https://www.scanworld.se/wp-content/plugins/formcraft/file-upload/server/content/files/160771139b86dd---8300007092.pdfIn PDF document text
    • https://www.capitalroofingct.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d955d4bd4fc---4638355091.pdfIn PDF document text
    • http://asupuro.com/user_data/image//file/jasunorogusotoja.pdfIn PDF document text
    • https://kayakbranson.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e90ac4d0d0---38537561457.pdfIn PDF document text
    • http://richmore.kr/uploadfile/fckeditor/file/36249680096.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/9d6c47cebe6e55703b4e0ce13122e2f4/82251132071.pdfIn PDF document text
    • https://mavismanagement.com/wp-content/plugins/formcraft/file-upload/server/content/files/16099c65d206db---nagibetigifavolaxuvepes.pdfIn PDF document text
    • http://assushop.com/userfiles/assushop.com/file/mupetadodojezudatilok.pdfIn PDF document text
    • http://labotinnghia.com/img/files/22901792848.pdfIn PDF document text
    • https://www.caesarstravel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609f624381a49---baroge.pdfIn PDF document text
    • https://myphi.biz/nbloom/fckuploads/file/gasujuketamuselokogepudal.pdfIn PDF document text
    • http://iwishop.hu/file/gezulop.pdfIn PDF document text
    • https://activepymes.com/pub/file/65264634780.pdfIn PDF document text
    • http://www.kliningstroy.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16072892de4752---44746025868.pdfIn PDF document text
    • http://epsilonsigorta.com/files/jafifajifobefusomij.pdfIn PDF document text
    • https://gruntbudowa.pl/files/file/50227456079.pdfIn PDF document text
    • https://transit-connection.com/userfiles/files/79001406913.pdfIn PDF document text
    • https://ecef-groupe.com/wp-content/plugins/super-forms/uploads/php/files/l0udfgncff8efnmecm8e5snha5/43580550334.pdfIn PDF document text
    • https://414movement.com/wp-content/plugins/super-forms/uploads/php/files/7883d2eafa0f3a83fc9ba7360bdda700/rezugiwasexotunonog.pdfIn PDF document text
    • https://lightupalife.org.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160df9946f3c6b---lesivanegiton.pdfIn PDF document text
    • http://beijingxinzhi.com/userfiles/file/20210626065333_1612167888.pdfIn PDF document text
    • http://www.peretprod.ro/content-images/file/dewopikevonedej.pdfIn PDF document text
    • https://pensionatiitalianiinportogallo.it/wp-content/plugins/super-forms/uploads/php/files/60795b02e582d1719ee702248c901e63/zonirase.pdfIn PDF document text
    • http://mrtowing.ca/Lawyers/userfiles/file/33131243218.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/GLLx1DTH0VQ/uplcv?utm_term=market+leader+3rd+edition+extra+advanced+pdfPDF 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_off0000d372.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD372 19492 bytes
SHA-256: 9ffa5abf654445c500f4b577a45deea86c349c15cbb2834ad4347456b07bd4a6