Malicious PDF — malware analysis report

Static analysis result for SHA-256 11c229cfe7a8c9b1…

MALICIOUS

PDF

102.3 KB Created: 2021-07-19 22:35:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-08-25
MD5: 392cc92191b2e1560eef6569c7e5067f SHA-1: 5257e6972964948dae8e4ddb48acaade06c463cc SHA-256: 11c229cfe7a8c9b1f247103088647ad3f79acad53bdee802ec7a874a3d669865
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a large number of external links, many of which point to compromised WordPress sites. The ML classifier and ClamAV both flagged this PDF as malicious, indicating it is likely part of a phishing or malware distribution campaign. The embedded links are designed to lure users to malicious content, potentially leading to further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9917

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 https://qboardapp.com/wp-content/plugins/super-forms/uploads/php/files/39db84c8ea1514f30c8848d3627b3d03/wozizapofotedarij.pdf In PDF document text
    • https://jamiatulbanat.in/wp-content/plugins/formcraft/file-upload/server/content/files/160f15d7997b1f---nubam.pdfIn PDF document text
    • https://www.inter-tube.co.uk/wp-content/plugins/super-forms/uploads/php/files/a30fca04cc9f05d146fd050bc419ea4f/rirupudamefiva.pdfIn PDF document text
    • http://bright-inter.com/file_media/file_image/file/12895857902.pdfIn PDF document text
    • https://alfa-clining.ru/wp-content/plugins/super-forms/uploads/php/files/21d6a72c7dd6495370ffcd508a0c0773/47903595379.pdfIn PDF document text
    • https://kopari.hu/files/file/xetaroz.pdfIn PDF document text
    • http://www.sunaryem.com.tr/wp-content/plugins/super-forms/uploads/php/files/f3rbj2eloke0r5g4ugs0vs4eu3/pufumifexike.pdfIn PDF document text
    • http://bethelhanberryaaa.com/clients/2/24/2465ef4bb9bb1b7382310ae17d7cafeb/File/godusubidosaxinasi.pdfIn PDF document text
    • https://gulertrafik.com/wp-content/plugins/super-forms/uploads/php/files/chhvokcjchqrlros6fr7ng1mkg/12036380988.pdfIn PDF document text
    • https://signaturetowerpune.com/wp-content/plugins/super-forms/uploads/php/files/127up7ne1k1n04deipf9pohqg6/10625181243.pdfIn PDF document text
    • https://webmodels.studio/wp-content/plugins/formcraft/file-upload/server/content/files/160c4ea5e58aae---supadewuxadanov.pdfIn PDF document text
    • http://medicamarsala.it/userfiles/files/wotukeg.pdfIn PDF document text
    • https://tcufroghouses.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b08e4b28715---14640421929.pdfIn PDF document text
    • http://brightwayconsultancyservices.com/userfiles/file/51851237388.pdfIn PDF document text
    • https://www.gsccn.it/wp-content/plugins/formcraft/file-upload/server/content/files/160a1e7e00896c---24254672620.pdfIn PDF document text
    • http://for-rent-aalst.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e7b531ff2d---85940232036.pdfIn PDF document text
    • http://doreenindiatours.com/userfiles/file/murelefi.pdfIn PDF document text
    • https://kalatranslation.co.uk/wp-content/plugins/super-forms/uploads/php/files/kisif3lok5enl4uhgtp994ugpl/3741500596.pdfIn PDF document text
    • http://halvani.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d69564449d5---kuvedeboneridavodefesa.pdfIn PDF document text
    • https://legacydockandmarine.com/wp-content/plugins/super-forms/uploads/php/files/a2e073280826ca2082d8bd5bcb9ed88f/mebatab.pdfIn PDF document text
    • http://www.julitolaschools.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609d18620da5f---wituvamotonadajurodaro.pdfIn PDF document text
    • https://www.azembay.com/wp-content/plugins/super-forms/uploads/php/files/grh9nqe05r0ubgmk8sh3sptb5o/25187163324.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/ad3c125642e4f8218d9d2b8a17a43a77/59825463321.pdfIn PDF document text
    • https://joyfool.art/wp-content/plugins/super-forms/uploads/php/files/9ad2196cb9a6c504640b4e7d45b5ebf6/34800906352.pdfIn PDF document text
    • http://gramercy-grand.ru/files/file/kezabipofagisidozuxow.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/zMnd8XtcwSM/uplcv?utm_term=scripture+words+of+my+mouthPDF 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_off00012d90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12D90 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000145a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x145A2 17068 bytes
SHA-256: 51fc7d47487c0ff3713b9a529d001127d914bd8d6f32686b53ff2117d8fe1347
font_02_sfnt_off00017240.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x17240 10948 bytes
SHA-256: 7b9a5e803ffc41ff720709b03319cb8fb71c254cf955ec6b030e73a90c75d234