Malicious PDF — malware analysis report

Static analysis result for SHA-256 a30f19986582d86e…

MALICIOUS

PDF

60.9 KB Created: 2021-09-05 22:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: 0851774b77c25dbd028525615c2a222c SHA-1: 33fe181cf8385a68abcf81d619de75694f168ef6 SHA-256: a30f19986582d86eae4cbfb43f5025f2101a62c454a537ac4029561cc8b4ab36
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 it is likely a phishing or malware distribution lure. The heuristics reveal it functions as a link farm, pointing to numerous compromised WordPress sites and other disposable hosting. While no scripts were explicitly extracted, the PDF structure and its nature as a lure suggest potential for embedded malicious JavaScript or other exploit mechanisms.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5042

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://crewmak.ru/uplcv?utm_term=testable+questions+worksheet+answers PDF link annotation
    • https://serviceelectric.ca/userfiles/file/57616956274.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/16095b8c49fa7c---nobedugibal.pdfIn PDF document text
    • http://www.sunarpazarlama.com/wp-content/plugins/super-forms/uploads/php/files/nhf644r2vm5bfhhpihkkq2h743/41205341666.pdfIn PDF document text
    • https://www.mii.net/wp-content/plugins/super-forms/uploads/php/files/219a404c73cda6f0b5f32b5162df5225/jarepikefuwakeze.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160907589a227a---72285992313.pdfIn PDF document text
    • https://abhimaninteriors.com/ckfinder/userfiles/files/vikadidemijanajoxozo.pdfIn PDF document text
    • http://www.smwiarus.pl/ckfinder/userfiles/files/girakukarodoz.pdfIn PDF document text
    • http://actionelectric.pt/www/wp-content/plugins/formcraft/file-upload/server/content/files/160a0eb8b6df6f---64155292257.pdfIn PDF document text
    • https://greenbins.ca/ckfinder/userfiles/files/93716517020.pdfIn PDF document text
    • http://bitite.lv/media/txt/122/file/zupel.pdfIn PDF document text
    • https://detector-billetes.com/Imagenes/file/bolegin.pdfIn PDF document text
    • https://sy-tech.eu/file/xudokujofikojajel.pdfIn PDF document text
    • http://www.icodar.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a0db9c315e5---lexovepun.pdfIn PDF document text
    • http://studiopol.it/userfiles/files/27943112391.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/160b5fd4bad082---48368576320.pdfIn PDF document text
    • https://www.propertyfilevault.com/wp-content/plugins/super-forms/uploads/php/files/f9dd807c8849fa90bb34eb2965257d3a/33950367882.pdfIn PDF document text
    • https://mobistore.co.nz/wp-content/plugins/super-forms/uploads/php/files/2a172b58d23d4675b7d3c529be42f8df/vilewe.pdfIn PDF document text
    • http://solarexperten.ch/fckeditor/editor/images/file/wedilekoloporowi.pdfIn PDF document text
    • https://www.cifphosteleriayturismo.es/ckfinder/userfiles/files/fafapuxav.pdfIn PDF document text
    • http://bjoybrands.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d37d9480427---bokut.pdfIn PDF document text
    • https://storage-in-motion.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608826a7ce354---78904000135.pdfIn PDF document text
    • https://abe-rdc.com/userfiles/file/82911148659.pdfIn PDF document text
    • http://mishelik.ru/userfiles/file/30551511111.pdfIn PDF document text
    • http://xn--12cfu9bc1efac9a9azfdsb7b9d1f0j.net/ckfinder/userfiles/files/nowepojipibinafaloxodo.pdfIn PDF document text
    • http://abwmarlboropike.com/uploads/files/22473667062.pdfIn PDF document text
    • https://chineseclothingonline.com/File/gafofarabumalitot.pdfIn PDF document text
    • 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_off0000c978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC978 17196 bytes
SHA-256: b2d10d395fb495df7a40e2843efcee7a47006d46796c85a53772eba62ba0759d