Malicious PDF — malware analysis report

Static analysis result for SHA-256 cc06ed1474a16454…

MALICIOUS

PDF

96.8 KB Created: 2021-09-01 06:27:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: d7bc2506b185715a8ebee6e50f6f99a5 SHA-1: d4569f004fb9cd5e0cfe2aff3514a73b83f21b8d SHA-256: cc06ed1474a1645458fde857133f50b1b20ae9219ef7f3fcb581f81089e65ab5
126 Risk Score

Malware Insights

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

The PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting. This structure is characteristic of phishing or malware distribution campaigns, aiming to lure users to malicious content. ClamAV detection further supports its malicious classification.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4621

Heuristics 6

  • 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
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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://sherylrobphotos.com/clients/56056/File/dizerurogub.pdf In PDF document text
    • https://acornschoolcharleston.org/wp-content/plugins/super-forms/uploads/php/files/366ab55856a10fa94dc53c0381e518c7/77470347633.pdfIn PDF document text
    • https://bookatowncar.com/userfiles/file/51521956583.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095c5165e071---dekagepasijifobuwap.pdfIn PDF document text
    • http://www.gcsystem.pl/wp-content/plugins/formcraft/file-upload/server/content/files/1609c7c0845ee4---90576839362.pdfIn PDF document text
    • http://driscollandgibson.com/images/edit_images/file/38750553362.pdfIn PDF document text
    • https://evocative.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16096d7446e8df---dipitebowobitubata.pdfIn PDF document text
    • https://feldmann-spedition.de/pics/userfiles/file/16760562218.pdfIn PDF document text
    • http://tropo-design.com/ckfinder/userfiles/files/suvebumujevivowaberevizif.pdfIn PDF document text
    • http://hferrynetworks.com/FileData/ckfinder/files/20210723_2D35CCC2D9FB1541.pdfIn PDF document text
    • https://laihouston.com/wp-content/plugins/super-forms/uploads/php/files/db1ea769121a966abbe9d61809ea1219/49565302830.pdfIn PDF document text
    • http://holidayinntorino.com/userfiles/files/38594454039.pdfIn PDF document text
    • http://colafranceschi.it/userfiles/files/runodikugawilasakitirowi.pdfIn PDF document text
    • https://christianboudreau.com/wp-content/plugins/formcraft/file-upload/server/content/files/160718724cdbdd---sukem.pdfIn PDF document text
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1611b60735586a---86768856541.pdfIn PDF document text
    • http://www.deopendeur.org/imgUser/file/85291105875.pdfIn PDF document text
    • https://jjmassociates.com/wp-content/plugins/super-forms/uploads/php/files/f6090a5c40612a38f374b6d4f6112939/sumupaxerabalefojusugoru.pdfIn PDF document text
    • http://k3projekt.pl/uploads/userfiles/files/wodevolexefizu.pdfIn PDF document text
    • http://vagtteam.dk/userfiles/Files/5843432138.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/160da8c523e5ef---zavigalivanabagurejaj.pdfIn PDF document text
    • http://sendedianqi.com/upload_fck/file/2021-6-23/20210623040805721463.pdfIn PDF document text
    • http://www.cemeba.com/uploads/ckfinder/files/19843492829.pdfIn PDF document text
    • http://www.naturhalles.fr/fckeditor/userfiles/file/32938732258.pdfIn PDF document text
    • http://stylist.in.ua/wp-content/plugins/formcraft/file-upload/server/content/files/160984fa76f256---wopamakewufexabo.pdfIn PDF document text
    • http://totaleclipsenv.com/wp-content/plugins/formcraft/file-upload/server/content/files/160af5934ebbf0---puvulonedelejeluv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=electronic+numerical+integrator+and+computer+was+developed+inPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0001223e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1223E 11092 bytes
SHA-256: bd5b97bfa8f6b7fc8b198a2471c65d326bd1f22d249aec5aa58fe0e42f1550d5
font_01_sfnt_off00013be8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13BE8 18132 bytes
SHA-256: 291df40127828e16057827817bff75cd7f374e52d7a3383f189cb2d239688cf1
font_02_sfnt_off00016aee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16AEE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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