Malicious PDF — malware analysis report

Static analysis result for SHA-256 adf10abef894e5de…

MALICIOUS

PDF

71.6 KB Created: 2021-07-27 15:50:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-04
MD5: a57bf3e4430f154b0df23effcd6fe028 SHA-1: 561648cf43a6d441cde16e9598067dc0f9bc8d5c SHA-256: adf10abef894e5debb6e27bcbf03a42fe03311d0d850b215cfbafc2b764904c9
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm, many hosted on compromised CMS upload directories. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.5771

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://skyfireconsulting.com/wp-content/plugins/super-forms/uploads/php/files/2e8dugl39fhdcv75jpag3sj81o/mikezilezafazebitodawowof.pdf In PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608d6ce2f0f68---sedazake.pdfIn PDF document text
    • https://ballestermultiservicios.com/wp-content/plugins/formcraft/file-upload/server/content/files/16073de9ca51ee---59715239845.pdfIn PDF document text
    • https://joefairless.com/wp-content/plugins/super-forms/uploads/php/files/50982c50860a2a282853abe36a7f3ffd/29188978374.pdfIn PDF document text
    • https://www.areatransfers.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b9d70e3b8eb---28636817324.pdfIn PDF document text
    • http://www.nanodrywash.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607ac4237d441---kugurege.pdfIn PDF document text
    • http://www.fliesen-brill.de/wp-content/plugins/formcraft/file-upload/server/content/files/160770268335ee---wutudakevapalomatozum.pdfIn PDF document text
    • https://relleno-acidohialuronico.com/wp-content/plugins/super-forms/uploads/php/files/3af4df387751ae3f2a99c2d8aacca942/70115131855.pdfIn PDF document text
    • https://truck-diagnostic.ru/wp-content/plugins/super-forms/uploads/php/files/2a73a5f3d2808fa4cf99df16cc25728e/bosugili.pdfIn PDF document text
    • https://poolpoint.be/uploads/file/18889080088.pdfIn PDF document text
    • http://www.iycadana.org/wp-content/plugins/super-forms/uploads/php/files/4jms8ioe18k576sjsm2nf1nmt0/pudujowefefavetevu.pdfIn PDF document text
    • https://gamletaarnhuset.no/wp-content/plugins/formcraft/file-upload/server/content/files/16081655f702bb---mofuvabenezigome.pdfIn PDF document text
    • http://crescentcarpets.com/userfiles/file/nipamuwaduvelutenevorabo.pdfIn PDF document text
    • http://grafiport.com/userfiles/file/45688859632.pdfIn PDF document text
    • https://www.3dreamchurch.com/wp-content/plugins/super-forms/uploads/php/files/410477bbbb9db4317bdadae5c30de516/vusokovonasumadimin.pdfIn PDF document text
    • http://gd-weimi.com/upfolder/e/files/20210530193553.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/64240501512.pdfIn PDF document text
    • https://sharidendesignasphalt.com/wp-content/plugins/super-forms/uploads/php/files/25dc661fb2ba2d8ee241666a55584647/zubanobovova.pdfIn PDF document text
    • https://havanic.com/cache/fck_files/file/nafed.pdfIn PDF document text
    • https://uaqbakery.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e2e9ea6bfe---79540344278.pdfIn PDF document text
    • https://celovechurch.org/wp-content/plugins/super-forms/uploads/php/files/93277ea5b839acf0058dfe1c0517b981/kapugubi.pdfIn PDF document text
    • http://qtjdb.com/UploadFile/2021/05/12/file/20210512_224116_149.pdfIn PDF document text
    • http://gorisum.net/fckeditor/upload_file/file/22811021805.pdfIn PDF document text
    • https://eandjfamilyhealthcenter.com/wp-content/plugins/super-forms/uploads/php/files/23a82eb8319d45b53a1a7540e3f72437/71300978846.pdfIn PDF document text
    • https://journeypeople.cc/wp-content/plugins/super-forms/uploads/php/files/1bf17c02bd3b2516646d6914e42e87bf/jonikixipoxeniniv.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/6naE_Nh8_CY/uplcv?utm_term=free+vlc+download+64+bitPDF 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_off0000c95f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC95F 15788 bytes
SHA-256: c5e4475b50a1bfdb77ed20482b8516cc7429bcb334e5f8e8350cc246cf08e351
font_01_sfnt_off0000f259.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF259 10712 bytes
SHA-256: 2851712799690bb798bbe3ea1604a4e67fd22891e76b6f357d01469f5eb53b8f
font_02_sfnt_off00010b1f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10B1F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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