Malicious PDF — malware analysis report

Static analysis result for SHA-256 fab36ef702cd155f…

MALICIOUS

PDF

70.7 KB Created: 2021-09-01 06:21:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: de8328a842b27a26f66147f1fea3d7ff SHA-1: e273a71423bba89392a726e3420e2a6c3a5ee62d SHA-256: fab36ef702cd155fa79d6446fddaae8d66032765a609186adeb5199bd8024809
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It contains numerous links, many pointing to compromised CMS upload storage and disposable hosting, suggesting a link farm designed to redirect users to malicious content. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing or malware distribution attempt, likely leveraging embedded JavaScript for redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9429

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://cfbadalona.net/ckdata/files/5012870177.pdf In PDF document text
    • http://zoo-foto.cz/userfiles/file/23857267895.pdfIn PDF document text
    • https://mebelpozakazu.ru/wp-content/plugins/super-forms/uploads/php/files/ee0b8af40836549ba9ccd4220ce37cf8/xukizepuwitapinom.pdfIn PDF document text
    • http://accessiblevehicleservices.com/userfiles/file/89989765740.pdfIn PDF document text
    • http://churchliferesources.org/wp-content/plugins/formcraft/file-upload/server/content/files/160ff79ab78b93---86223649155.pdfIn PDF document text
    • http://songiadabinhphuoc.com/upload/ck/files/fubamadufositopivuxusu.pdfIn PDF document text
    • http://argra.rs/wp-content/plugins/formcraft/file-upload/server/content/files/160e18a167e6bb---61986591657.pdfIn PDF document text
    • https://ddshower.com/ckfinder/userfiles/files/mewutojomeganog.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/suq5h1drfbgl8kkkkf5kknept5/51709414998.pdfIn PDF document text
    • https://www.conkite.com/wp-content/plugins/super-forms/uploads/php/files/9b37e2e9b9159edae86136b62cacd581/37790008426.pdfIn PDF document text
    • https://yastudio.net/wp-content/plugins/super-forms/uploads/php/files/75e90361d072d1c4b21e58572f8aed39/88788648225.pdfIn PDF document text
    • https://miet.hu/kepek/kinexejuzirodogi.pdfIn PDF document text
    • https://nowbali.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160970f4e7c6c4---wilulidegebukezovul.pdfIn PDF document text
    • http://a2itsolutions.com/chop/multimedia/userfiles/file/nujupul.pdfIn PDF document text
    • https://devismesport.fr/userfiles/file/nanezujoti.pdfIn PDF document text
    • https://www.grandeprairie.org/wp-content/plugins/formcraft/file-upload/server/content/files/1609d8cb473571---33535147197.pdfIn PDF document text
    • https://nicemexico.net/wp-content/plugins/formcraft/file-upload/server/content/files/160f12d74d9041---74819720668.pdfIn PDF document text
    • http://vipavtoufa.ru/wp-content/plugins/super-forms/uploads/php/files/2ee0d0f01d3321136108ef77683add08/72069746329.pdfIn PDF document text
    • http://www.brennholz-heinlein.de/wp-content/plugins/formcraft/file-upload/server/content/files/1609f8df770eb1---49605293346.pdfIn PDF document text
    • http://margheritango.it/userfiles/file/7832363425.pdfIn PDF document text
    • https://tecnibat.net/uploads/archivos/kininafolixunoxis.pdfIn PDF document text
    • https://nwdglobal.com/ckfinder/userfiles/files/dexujigorujiduwov.pdfIn PDF document text
    • http://mijneigenlift.nl/wp-content/plugins/formcraft/file-upload/server/content/files/160a5c6ad9632f---gowobifenu.pdfIn PDF document text
    • https://www.businesswatchguardingservices.co.uk/wp-content/plugins/super-forms/uploads/php/files/p156hcfu8ou4rhhbp3t76vb6p4/jubipazozejexipowimikod.pdfIn PDF document text
    • http://asu.com.vn/wp-content/plugins/super-forms/uploads/php/files/aiv6c5d6b9s7lmufg9l5f79t71/tulubuxogamazojuzabe.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=equal+opportunity+act+of+1964PDF 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_off0000e321.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE321 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fb38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB38 10984 bytes
SHA-256: 7e9b2edc6eb19f9c70096b726c3a3b2206ada7820091c2f743ba9d8808984eb1