Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e8f54b9ae3456a1…

MALICIOUS

PDF

93.4 KB Created: 2021-09-03 23:30:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2e5a0dd2e9d6b725e4edd45e04a7b871 SHA-1: cef9c4ed363a2d63082af287dcdecd7c6ad0c5b4 SHA-256: 1e8f54b9ae3456a141e1ce8b3abdfa146f1ed407f3bb44b286c03ab315ad7441
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file is detected as a phishing trojan by ClamAV. It contains numerous links to external websites, many of which are hosted on compromised CMS platforms or appear to be part of a link farm designed for SEO manipulation. The document body is heavily obfuscated and unreadable, but the presence of external links and the ClamAV detection strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier clean score 0.2122

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 http://xiaohecollege.com/d/files/tefetegetov.pdf In PDF document text
    • http://www.kreasoft.mx/wp-content/plugins/formcraft/file-upload/server/content/files/160d3ba6e2641a---xebogewiwowenijudawu.pdfIn PDF document text
    • https://dfa-finanz.de/wp-content/plugins/formcraft/file-upload/server/content/files/160a548958c0db---sevuwegagapebekewuna.pdfIn PDF document text
    • http://indel.sk/userfiles/file/vazatuxapepiraxoleribosi.pdfIn PDF document text
    • http://asbufestival.com/uploads/FCK_files/file/39315118136.pdfIn PDF document text
    • https://dsodrecital.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d8e4b4ebca---73868671912.pdfIn PDF document text
    • http://sanfrancescovet.com/userfiles/files/81607774363.pdfIn PDF document text
    • http://morenoroofing.com/wp-content/plugins/formcraft/file-upload/server/content/files/161257f4c9f528---zesoxur.pdfIn PDF document text
    • https://ceilford.org/wp-content/plugins/super-forms/uploads/php/files/09db12067ee02938eb0815623c9ba9a8/5908106101.pdfIn PDF document text
    • http://laxycoffee.com/upload/files/jujelajiser.pdfIn PDF document text
    • http://melodylavernebettencourt.com/media/file/36636210032.pdfIn PDF document text
    • http://mkpstroitel.ru/upload/files/51670312355.pdfIn PDF document text
    • http://amuseonline.com/absite/userfiles/file/79364347321.pdfIn PDF document text
    • https://contabil-fiscal.ro/mm/file/figusazefipujiwosuk.pdfIn PDF document text
    • http://mesterek.net/tmp/15661926703.pdfIn PDF document text
    • http://xz-brand.com/ckfinder/userfiles/files/16323139334.pdfIn PDF document text
    • https://www.qlsny.com/wp-content/plugins/super-forms/uploads/php/files/ba9eeaba3703eac2917de37999666291/7978946105.pdfIn PDF document text
    • https://namastehealth.in/wp-content/plugins/super-forms/uploads/php/files/nnan573ftme0qp8bguo95jonhi/kukexujinigelar.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/ouid1coaeet7bcji1gai9p3n16/marebipadunitevaxoro.pdfIn PDF document text
    • https://electroagro.es/pub/files/32269751900.pdfIn PDF document text
    • http://wghsclassof69reunion.com/clients/b/b3/b33699c65747f61a54cd06c2fab73d22/File/bofabufun.pdfIn PDF document text
    • https://agilitynd.com/wp-content/plugins/super-forms/uploads/php/files/09088ffde1981964f5babcc68259a670/mageladotaj.pdfIn PDF document text
    • https://takiminsahada.com/wp-content/plugins/super-forms/uploads/php/files/4n81sndac03vj81387duh4t1b6/26892597458.pdfIn PDF document text
    • http://xn--82ca1bkibi6eufn5bh1b7i3e.com/UserFiles/File/topadagizajirozujiwib.pdfIn PDF document text
    • http://www.loockuniformes.com.br/home/wp-content/plugins/formcraft/file-upload/server/content/files/16081cf8d79a1b---3310188521.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/fzgW7-mxBc0/uplcv?utm_term=jcl+tutorial+pdf+free+ebookPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012373.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12373 18768 bytes
SHA-256: e9554b3d78cdaf1d832c8f74490e193c6698cd36c47a7cded94f01e91a50d2ff
font_01_sfnt_off0001545b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1545B 10664 bytes
SHA-256: 53d2e4b9a8087567024de60720455b70cc5606c2b352ab2f58ad4d795e59f7c3