Malicious PDF — malware analysis report

Static analysis result for SHA-256 ede566696d18d7ad…

MALICIOUS

PDF

121.8 KB Created: 2021-08-12 04:15:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: e299ca6db2b2bde356d0e4f064d7837d SHA-1: f4222bb8475c7f1740f9de8338e62bbc2c0e726d SHA-256: ede566696d18d7adb9c2e704ffb4178a2774e2876d79a3a9e585ba3d8917677b
156 Risk Score

Malware Insights

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

This PDF file was detected as malicious by ClamAV and an ML classifier, indicating a high likelihood of malicious intent. It functions as a link farm, containing numerous URLs pointing to compromised WordPress sites and other disposable hosting. These links likely serve as redirects to phishing pages or malware download sites, aligning with the 'Spearphishing Attachment' technique. The presence of multiple compromised CMS upload links suggests a coordinated effort to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9994

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://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/16082acad6a2ff---zafopox.pdf In PDF document text
    • http://olympicburger1988.com/uploads/files/mafikerisavovixek.pdfIn PDF document text
    • http://leap-egypt.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610e28665adb2---20629677210.pdfIn PDF document text
    • http://brunagabriele.it/userfiles/files/31378591440.pdfIn PDF document text
    • http://www.hotel-margherita.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8a829a362---zuwerajedonobupavuliren.pdfIn PDF document text
    • https://wscnaturalhealings.com/wp-content/plugins/super-forms/uploads/php/files/9813bb81003b44912b5c1a28a5026581/94570546090.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/16156096008.pdfIn PDF document text
    • http://rainbowcaterers.in/userfiles/file/85966782629.pdfIn PDF document text
    • http://www.orhancoskun.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b15786c200---97096470344.pdfIn PDF document text
    • https://weyergans-hcc.lv/userfiles/file/88412696359.pdfIn PDF document text
    • http://solarhomepage.ch/fckeditor/editor/images/file/wimekefajele.pdfIn PDF document text
    • http://kaufdeinauto.de/wp-content/plugins/formcraft/file-upload/server/content/files/160ae63cc57cff---kebofonivofezetesogusuz.pdfIn PDF document text
    • https://www.a2zmedical.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160adce3cbbeea---79536815360.pdfIn PDF document text
    • http://khangvietdn.com/uploads/file/jitit.pdfIn PDF document text
    • https://nenmongdangquang.com/upload/files/nekufapademotegavib.pdfIn PDF document text
    • https://outsourcedbackoffice.co.uk/wp-content/plugins/super-forms/uploads/php/files/8758a84cddc459b2bcbb509ba56e50a3/19260876703.pdfIn PDF document text
    • http://omonetach.pl/foto/ilustracje/file/wedazugu.pdfIn PDF document text
    • https://nutricount.cz/UserFiles/File/37473015100.pdfIn PDF document text
    • http://reclaimsplus.com/wp-content/plugins/super-forms/uploads/php/files/77cdda856c79702b73ab98963a86b459/51565495147.pdfIn PDF document text
    • http://sxhk365.com/uploads/file///kotog.pdfIn PDF document text
    • http://global-gypsum.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606d8d8773c00---somaropenaxejibudolux.pdfIn PDF document text
    • http://glina-master.ru/admin/ckfinder/userfiles/files/robalipabuzapamidali.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/S30rS-6n6vg/uplcv?utm_term=smcr+model+of+communication+shannon+and+weaverPDF 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_off0001726c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1726C 11068 bytes
SHA-256: a7cccbdcbe4749ccd1771b26d1c2db18b46ec75398a3266120aa12dec714ec27
font_01_sfnt_off00018c08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x18C08 20472 bytes
SHA-256: 7e2031e6b9edfe68b2a74262cf36b1c8edad763eaf7c609d2eb26daa98dc1732
font_02_sfnt_off0001be5b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1BE5B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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