Malicious PDF — malware analysis report

Static analysis result for SHA-256 6fc2b4d908ee450c…

MALICIOUS

PDF

189.3 KB Created: 2021-09-04 11:35:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-23
MD5: 07ee9eb1c1e004181609157dc66f3eed SHA-1: 223525762413ee8fc8a6b9d921b3ba94177d72f1 SHA-256: 6fc2b4d908ee450cc48d86674a5e3ad945e68617537de402f8995190b1ae2679
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and by an ML classifier as malicious. It contains a link farm pointing to multiple compromised WordPress upload directories and disposable hosting sites, suggesting an attempt to obscure the ultimate destination. The presence of numerous PDF links, many with UTM parameters, indicates a phishing or scam attempt designed to lure users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9963

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://shoreluxurylimos.com/userfiles/files/lusagufumuvisetiniwif.pdf In PDF document text
    • https://ijmscr.com/ckfinder/userfiles/files/dibogapuf.pdfIn PDF document text
    • https://agrilaui.com/userfiles/file/27699099409.pdfIn PDF document text
    • https://norservis.cz/files/files/wewusepubuweganixeti.pdfIn PDF document text
    • http://visualpaint.com/wp-content/plugins/formcraft/file-upload/server/content/files/160e77c4bf3c4c---kuniroperedejasaji.pdfIn PDF document text
    • http://thekitchendesignstudio.org/uploads/files/70412474349.pdfIn PDF document text
    • http://www.lightingandhvacexpo.com/wp-content/plugins/super-forms/uploads/php/files/60620c35185003d77841f20f2e58d6af/lefulewovugimiva.pdfIn PDF document text
    • http://longarmquiltacademy.net/fckeditor/userfiles/file/68748626907.pdfIn PDF document text
    • http://dailitara.lt/bites/uploads/file/9810747329.pdfIn PDF document text
    • http://jrpst.pl/userfiles/file/56955359062.pdfIn PDF document text
    • http://safarang.com/basefile/files/11586258694.pdfIn PDF document text
    • http://www.gradur.ba/wp-content/plugins/formcraft/file-upload/server/content/files/1608f93125f093---17767527013.pdfIn PDF document text
    • https://anna-bel.com/app/webroot/files/userfiles/files/76844199259.pdfIn PDF document text
    • http://staresecurity.com/userfiles/file/77634431812.pdfIn PDF document text
    • https://theshairpodcast.com/wp-content/plugins/super-forms/uploads/php/files/47b379ad401285d7d75175d40d5ba72b/1763127234.pdfIn PDF document text
    • http://mtsskzy.com/userfiles/file/36363391852.pdfIn PDF document text
    • http://trainternational.in/wp-content/plugins/formcraft/file-upload/server/content/files/16096007cee661---25194793523.pdfIn PDF document text
    • http://studioguatta.it/userfiles/files/sozizilod.pdfIn PDF document text
    • https://siphouse96.com/wp-content/plugins/super-forms/uploads/php/files/a845c9788c9e04e7f8cf1c547abb0a22/kezuwuxe.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a6ae5e8ff52---67248328722.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/160f92886e8a20---41762687675.pdfIn PDF document text
    • https://ckmusicdesign.nl/userfiles/file/23323099780.pdfIn PDF document text
    • http://ptk-astana.kz/wp-content/plugins/super-forms/uploads/php/files/e0bfdabaa8032d6aa5b781a85cc271da/94686217198.pdfIn PDF document text
    • http://playbabydoll.com/userfiles/file/74028691730.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/160753ec9670f6---98012629083.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/LPIa9PGmDLg/uplcv?utm_term=matlab+optimization+toolbox+user+guide+pdfPDF 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_off00027b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x27B65 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0002937c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2937C 11236 bytes
SHA-256: c4d8d30d78ead359f56a4a4938073335413641e3420a107a9937a8d761f51d42
font_02_sfnt_off0002ad6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2AD6D 21492 bytes
SHA-256: 222b3f49d5052630968f9e2e81a9e86d56eff030dfc687639fba1ad0f1f496b5

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