Malicious PDF — malware analysis report

Static analysis result for SHA-256 ce0c7a7405eaf4a8…

MALICIOUS

PDF

78.1 KB Created: 2021-07-01 13:36:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: 8d2b2b300119292535d13d685d34f67f SHA-1: bf20a0756837b375ae2d33324d5889a32798d7d5 SHA-256: ce0c7a7405eaf4a8a63b76842a7deddd8f3880d16360553ef0596770a61a7b7c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links, many of which point to compromised CMS upload directories, suggesting a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection further support its malicious nature, classifying it as a phishing trojan. No scripts were extracted, but the structure indicates a phishing or redirection attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5624

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://www.emporiocaritaspisa.it/wordpress/wp-content/plugins/formcraft/file-upload/server/content/files/1607ff074ebc70---zelakoju.pdf In PDF document text
    • https://cristiandellavedova.com/wp-content/plugins/super-forms/uploads/php/files/8gr1n4pcut8jbbtoat7u9tcum2/75201182124.pdfIn PDF document text
    • http://www.viksexteriors.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a83c561dff4---80929962405.pdfIn PDF document text
    • http://dalnoboy.net/data/filestorage/upload/files/26853256604.pdfIn PDF document text
    • https://southernlightingsource.com/wp-content/plugins/super-forms/uploads/php/files/9aaabcb7578ead061e7e9abd824f6986/poseboborowuvetazos.pdfIn PDF document text
    • https://lncl.org/ckfinder/userfiles/files/xekikigevup.pdfIn PDF document text
    • https://gservicepz.com/wp-content/plugins/super-forms/uploads/php/files/c470d67e7cbb90a5de88b2754227cff7/wofavidedazexel.pdfIn PDF document text
    • http://hoshitorionline.com/uploads/files/migudujanuzipejazizewuxam.pdfIn PDF document text
    • https://kvkumariajnkvv.org/singhania/downloads/file/mazapozavu.pdfIn PDF document text
    • https://www.mozartcantat.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160858bfbc58dc---wobalelijavuzuvofala.pdfIn PDF document text
    • https://refundsrefunds.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609faa72afb08---mugezuxonalaguvakibe.pdfIn PDF document text
    • http://www.northeastmarquees.com/wp-content/plugins/super-forms/uploads/php/files/1aa2070d55e5630f47f5d25d0dc85b77/rutukusekinesa.pdfIn PDF document text
    • https://greyquotient.com/wp-content/plugins/super-forms/uploads/php/files/f0ba20cb975232916a205fffbe9e4cc7/96867599495.pdfIn PDF document text
    • http://chatfieldfarms101.com/userimages/76093910054.pdfIn PDF document text
    • http://dichvugiayphep.net/hinhanh_fckeditor/file/xowewazojodosimutesan.pdfIn PDF document text
    • http://shsalumniauditorium.org/clients/f/fa/fa32e32112b7cad64a7d7e78b95ed61b/File/rakamitano.pdfIn PDF document text
    • https://www.saltriot.com/wp-content/plugins/super-forms/uploads/php/files/8c8c6bec497fd5b66922546da1df17fc/91035406339.pdfIn PDF document text
    • http://geose.ru/userfiles/file/37439844107.pdfIn PDF document text
    • http://bazatalty.pl/wp-content/plugins/super-forms/uploads/php/files/df136eb652d4f515ac99f4fcd3d6aeb1/41232077884.pdfIn PDF document text
    • http://www.jhannahs.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607f22d04953d---kemewowo.pdfIn PDF document text
    • https://fo-prefectures.com/pages/files/nezigetoza.pdfIn PDF document text
    • http://loveperfectionschool.com/upload/file/sidujewinenetilamomixa.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/LPIa9PGmDLg/uplcv?utm_term=what+does+arg+mean+in+textPDF 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_off0000e954.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE954 17624 bytes
SHA-256: 7589d136ed7b11e6c301cf19b125c36f68733dcc02367d7a9016448274b5e965
font_01_sfnt_off00011762.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11762 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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