Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ccdbbdb5e7de8d2…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 13:05:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 44c05ab9438bd8392b2e60a92fa5a8e2 SHA-1: 08b539eef1e16589cada588b9de945a8b4b4a778 SHA-256: 3ccdbbdb5e7de8d28b3310a0c9f4356f5457499eb56881a1435b874450d04607
132 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains embedded JavaScript and a significant number of links, many of which point to compromised WordPress upload directories. The ClamAV detection as 'Pdf.Phishing.Trojan' further supports a malicious classification. The embedded JavaScript likely facilitates the redirection to these malicious links, which are designed to deceive users.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.3497

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://vasvaripalmuzeum.hu/upload/file/42849575783.pdf In PDF document text
    • http://proxima-design.cz/files/file/volaridoramofetexadene.pdfIn PDF document text
    • https://btcauction.vn/hinhanh/file/92827124671.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b453b0ac0b---37622474621.pdfIn PDF document text
    • http://tatvideo.ru/ckfinder/userfiles/files/84730064023.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1608dcf1c41e13---12667350300.pdfIn PDF document text
    • https://capital-tic.com/upload/ckfinder_temp/files/20210527191417.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/kegujazuvewevaximosabube.pdfIn PDF document text
    • https://hongmao.tw/uploads/files/202108251437599225.pdfIn PDF document text
    • https://www.pferde-fuer-unsere-kinder.de/wp-content/plugins/formcraft/file-upload/server/content/files/160c7b40f3b7ac---72102857279.pdfIn PDF document text
    • http://kaplanpm.com/wp-content/plugins/formcraft/file-upload/server/content/files/16075cb471a329---96987627047.pdfIn PDF document text
    • http://uro-medical.pl/zdjecia/fotki/file/pubulunaku.pdfIn PDF document text
    • http://awkontrakt.pl/ckfinder/userfiles/files/biwifimojuwoja.pdfIn PDF document text
    • http://bud-drog.pl/userfiles/file/zekiselukobesikavevi.pdfIn PDF document text
    • https://www.bocamvigliesrooms.com/wp-content/plugins/super-forms/uploads/php/files/2a8736aa73197c02d64bda1c68cf372e/40238749305.pdfIn PDF document text
    • https://www.audifonosdoshoydos.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b423a1acb97---13276249221.pdfIn PDF document text
    • http://timelessmebel.ru/wp-content/plugins/super-forms/uploads/php/files/28b75f8db1b935a2561fa86d6aabeffb/75336451004.pdfIn PDF document text
    • https://soba05.org/wp-content/plugins/super-forms/uploads/php/files/ffef927c0c66582aebaa98ec997063e4/76255697972.pdfIn PDF document text
    • http://heatherjansch.com/ckfinder/userfiles/files/jezegadubilibunodok.pdfIn PDF document text
    • http://thesciencenetwork.org/uploads/files/dakaloluvotixujimibeto.pdfIn PDF document text
    • https://hotelindigha.com/FCKeditor/file/71166743792.pdfIn PDF document text
    • http://gaishachuukobuhin.com/js/upload/files/kugerew.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/DOqCt-cVA4I/uplcv?utm_term=passport+annexure+d+form+pdfPDF link annotation
    • https://mediaget.com/userfiles/files/57957557891.pdfIn PDF document text
    • 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_off0000e86e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE86E 10724 bytes
SHA-256: 858958b0159063a8d1ae5c4204e57072442aa4f668b675199fcf82c1712ae19d
font_01_sfnt_off00010119.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10119 18664 bytes
SHA-256: 528cd81d77f0218ea9837f3c743829737f83468a7da1be1158dabf3b3af849ae

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