Malicious PDF — malware analysis report

Static analysis result for SHA-256 018bf6ccf7dfe340…

MALICIOUS

PDF

88.3 KB Created: 2021-08-26 02:59:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: d7f207c1a1cdb714c4e4b9d6308fed4c SHA-1: 6ff54b8c2eb932138f3da3ca20f670438345ecb6 SHA-256: 018bf6ccf7dfe340c1b67af66627e56544e5b35cbe7db540f45573c15c4b567f
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains numerous links, many of which point to compromised WordPress upload storage or other disposable hosting, indicating a link farm designed to distribute malicious content or phish users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9990

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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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://mentaplywood.com/images_upload/files/movamedoxobafutoremomu.pdf In PDF document text
    • http://edwardlankin.com/clients/86087/File/mijonifoxugoze.pdfIn PDF document text
    • http://shangrilayunnan.com/ckfinder/userfiles/files/14779996730.pdfIn PDF document text
    • https://solener.info/ckfinder/userfiles/files/kenemaj.pdfIn PDF document text
    • https://mahae.hu/files/files/wusisovolakuj.pdfIn PDF document text
    • https://hoffmanowska.pl/wp-content/plugins/formcraft/file-upload/server/content/files/160a84ed8de120---xovadifonubeva.pdfIn PDF document text
    • http://psychologyforeverybody.com/ckfinder/userfiles/files/delibetexawemaporemifod.pdfIn PDF document text
    • http://appinaris.net/ckfinder/userfiles/publics/files/bumufejojokademob.pdfIn PDF document text
    • http://careerhack.net/wp-content/plugins/formcraft/file-upload/server/content/files/1607af51d8295d---bidirerawereloba.pdfIn PDF document text
    • https://moderator.lt/components/com_mijoshop/opencart/image/data/files/26006208127.pdfIn PDF document text
    • http://lindendirect.com/tempimg/file/7313131080.pdfIn PDF document text
    • http://peggylittlelawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/57660613760.pdfIn PDF document text
    • https://rrvchefs.com/wp-content/plugins/super-forms/uploads/php/files/4d1c3aaf290f69b5209e88c947368242/zuxetuvutidival.pdfIn PDF document text
    • https://alenakovalchuk.ru/wp-content/plugins/super-forms/uploads/php/files/96f6a1259440c4ada762816654ccfc6c/76185047554.pdfIn PDF document text
    • https://agenciaboom.com/wp-content/plugins/super-forms/uploads/php/files/16la31uce6b1oilqngg48mj7o0/61769879097.pdfIn PDF document text
    • http://dabbleanddesign.com/clients/c/c6/c60e280709801842a26e47e23f21f170/File/kuxewumemeta.pdfIn PDF document text
    • https://harpethvalleypto.org/wp-content/plugins/super-forms/uploads/php/files/c7715c15e5495bf17bee65b306ea39ee/3230493882.pdfIn PDF document text
    • https://www.olympusnorge.no/wp-content/plugins/super-forms/uploads/php/files/cvab9f1ug3u464p5a3931ei5vc/23946873388.pdfIn PDF document text
    • http://augustaelectricalwork.com/editorData/file/26301298508.pdfIn PDF document text
    • http://plkorea77.com/ckupload/files/304487373.pdfIn PDF document text
    • https://unique.global/wp-content/plugins/super-forms/uploads/php/files/14eb69c349088768ac9c69b450455920/rafevarelirebonulirisu.pdfIn PDF document text
    • http://turhantur.com/turhantur/files/9446964369.pdfIn PDF document text
    • https://thai-airpark.com/ckfinder/userfiles/files/mixeje.pdfIn PDF document text
    • https://webhostmurah.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608d0a0d09e10---81256981883.pdfIn PDF document text
    • https://afd.me.uk/wp-content/plugins/super-forms/uploads/php/files/p1ku9eoljgn61421qvh8f29q2l/91337806257.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/ngfLrbzwjls/uplcv?utm_term=eating+below+1000+calories+a+dayPDF link annotation
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • 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_off0000f3b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3B6 11044 bytes
SHA-256: 3db52ccff4b2ae4d7ed2fd18081e98bfaa14415a50f145a7eadfbcc9f6becee9
font_01_sfnt_off00010d6e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D6E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00012580.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12580 17312 bytes
SHA-256: 801d9f0c324a42edc6dfce32c2143d1b4874984a5f77d2e8389f5f0577ffbcb1