Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b50ae0b8649d23b…

MALICIOUS

PDF

80.4 KB Created: 2021-07-15 22:29:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 5f2775a422b1d408737257c0618df2ca SHA-1: 22f08565398e8885a794e1ca0733aff9fd3b7317 SHA-256: 6b50ae0b8649d23bca5e25b11c31dba1c50aa732a00a675a2929b1c6495e6c82
124 Risk Score

Malware Insights

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

The file is identified as malicious by ClamAV with a 'Pdf.Phishing.Trojan' signature. It contains numerous links, many pointing to compromised WordPress upload directories, suggesting a link farm designed to distribute further malicious content. The presence of these links indicates an attempt to trick users into downloading additional malicious files, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4208

Heuristics 5

  • 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.
  • 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://humantouchtranslations.com/wp-content/plugins/formcraft/file-upload/server/content/files/1/16086ab5a64bf7---95052597585.pdf In PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/1606cbbaf8431b---63227449453.pdfIn PDF document text
    • http://ibb-online.ru/f/file/29254414064.pdfIn PDF document text
    • http://www.nowsingapore.co.id/wp-content/plugins/formcraft/file-upload/server/content/files/160b4701459cae---ruxulapipetibaxipoxaroma.pdfIn PDF document text
    • https://euroroma-bg.org/files/file/bixigis.pdfIn PDF document text
    • http://condosworld.com/abisol1/userfiles/files/derobimijiwugojo.pdfIn PDF document text
    • http://slp72.com/clients/7/7b/7b902bee17765b19ebdde6030f24742d/File/25198987763.pdfIn PDF document text
    • https://cissud.com/uploads/ck_editor/files/buleledawinarini.pdfIn PDF document text
    • http://imagespa.mx/wp-content/plugins/formcraft/file-upload/server/content/files/1608940b5892e3---18892179981.pdfIn PDF document text
    • http://architettoletiziamasciotta.eu/userfiles/files/sakadex.pdfIn PDF document text
    • https://reparationmobile.net/userfiles/file/40639222586.pdfIn PDF document text
    • https://kingcarmotorista.net/uploads/files/1954150329.pdfIn PDF document text
    • https://www.techsrollout.com/wp-content/plugins/formcraft/file-upload/server/content/files/160aae5844ae12---20672816105.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606efb23c0813---ponupifulipamilan.pdfIn PDF document text
    • https://www.kadeavenue.com/wp-content/plugins/super-forms/uploads/php/files/31f3dc1b0ecf08534b930fc8115787dd/18500699560.pdfIn PDF document text
    • https://www.inkfactory.pk/wp-content/plugins/formcraft/file-upload/server/content/files/160c62b5613944---jirumemexowusuwuwudogapu.pdfIn PDF document text
    • https://bellevuecommunityfoodbank.org/wp-content/plugins/super-forms/uploads/php/files/e79c23c088dc6b38101df62e341e8d0d/furoroxazuzukibep.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bd610ee90b6---77042002928.pdfIn PDF document text
    • https://alternatifhirdavat.com/upload/ckfinder/files/vakofatelorevefa.pdfIn PDF document text
    • https://elicopter-de-inchiriat.ro/wp-content/plugins/formcraft/file-upload/server/content/files/160a28481af8f4---65775554904.pdfIn PDF document text
    • http://prodesign31.ru/wp-content/plugins/formcraft/file-upload/server/content/files/160ae82da1a87c---zopuvoba.pdfIn PDF document text
    • https://useoneconvo.com/wp-content/plugins/super-forms/uploads/php/files/2181da6b517825ff9b79ba37d1ed8a18/18828383455.pdfIn PDF document text
    • http://simonkuehner.de/gfx/userfiles/files/17041871807.pdfIn PDF document text
    • https://cullinanconstruction.com/wp-content/plugins/super-forms/uploads/php/files/11ukurf6qa3hhfb8jldhg6eusj/60956597718.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=scalloped+potatoes+with+heavy+cream+and+no+cheesePDF 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_off0000e938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE938 17440 bytes
SHA-256: dd22e19c639a22794f3c1cb1fd0085535ce22815b8833e67492728dcb0c84e4d
font_01_sfnt_off00011745.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11745 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1