Malicious PDF — malware analysis report

Static analysis result for SHA-256 cac2c48d6346e063…

MALICIOUS

PDF

86.1 KB Created: 2021-09-09 15:49:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 61509bd7081bcf65213cd808dfdf6f5c SHA-1: bb8d68bb20468287c27fa1a79aba04cff8177206 SHA-256: cac2c48d6346e0634e57922f705e4ba5c3c990b397b05b55e11f60857fd11cd7
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file was detected as malicious by ClamAV and a machine learning classifier. It contains embedded JavaScript and a link farm that points to compromised WordPress upload storage and other disposable hosting. The document's purpose appears to be to redirect users to potentially harmful content through a series of links, masquerading as a legitimate resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 8

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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://e-sportis.com/images/upload/47511255041.pdf In PDF document text
    • https://ecowaytechnologies.com/ckfinder/userfiles/files/72038161032.pdfIn PDF document text
    • https://silatur.com/js/ckfinder/userfiles/files/36434992061.pdfIn PDF document text
    • https://gangwontaxi.com/FileData/ckfinder/files/20210901_F90EED6D54148E49.pdfIn PDF document text
    • https://cyklo-wellness-penzion-palice.cz/content/ramujo.pdfIn PDF document text
    • http://thaihotelsale.com/FileData/ckfinder/files/20210909_06C7958C72C1DCC4.pdfIn PDF document text
    • http://gingerwooddesign.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613813ce1ed7a---kekilupuma.pdfIn PDF document text
    • http://rigassprotes.lv/uploadz/file/pefesopixadapebonumuva.pdfIn PDF document text
    • https://ssekolkata.com/ckfinder/userfiles/files/kafeporufaf.pdfIn PDF document text
    • https://renesens21.com/ressources/upload/files/93787893513.pdfIn PDF document text
    • https://auto826.vnpec.xyz/uploads/files/tunulipedezijefadunixem.pdfIn PDF document text
    • http://standartbio.com/fckfiles/file/98173505133.pdfIn PDF document text
    • http://vnationwide.com/userfiles/files/83388683171.pdfIn PDF document text
    • https://artinterior.bg/userfiles/file/53108885463.pdfIn PDF document text
    • http://tfe-design.dk/userfiles/file/mevotititalaxemajo.pdfIn PDF document text
    • http://soloparamideco.com/js/new/fckeditor/userfiles/file/18846602317.pdfIn PDF document text
    • http://adanateknikservis.web.tr/wp-content/plugins/formcraft/file-upload/server/content/files/16134327ae9013---59686416811.pdfIn PDF document text
    • http://sevimticaret.net/userfiles/file/suravitisajo.pdfIn PDF document text
    • https://pingthye.com/userfiles/files/89209397757.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16130fb627e750---81533330182.pdfIn PDF document text
    • http://22vek-omsk.ru/fck_editor_files/files/barekexi.pdfIn PDF document text
    • https://cityface.cz/res/file/66296312069.pdfIn PDF document text
    • http://salamino.pl/userfiles/file/kusetepulotowevaj.pdfIn PDF document text
    • http://hzdsbg.com/uploadfile/1631079189.pdfIn PDF document text
    • http://rnralpha.cz/res/file/90649446374.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/DOqCt-cVA4I/uplcv?utm_term=text+art+memes+copy+and+pastePDF 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_off0000e25c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25C 21100 bytes
SHA-256: 7505496b412c8020145bed764e43eb07d2f6b506f2c3fdc0e4477761f934caba
font_01_sfnt_off000119c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x119C7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off000131de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x131DE 10716 bytes
SHA-256: cac72f694800604d07ca847712608dfd5d77092fba49b349cc83dddc4b267847

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