Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca75c5a60cd963ef…

MALICIOUS

PDF

76.6 KB Created: 2021-09-17 17:16:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 72b1120cc472e20ab6b1946e263fa0d1 SHA-1: e8c8fb305f8ebe465441f5be780abf3c563091f9 SHA-256: ca75c5a60cd963ef00cf55ed480100abd339518ee8a38dbee15fa9b885e698ad
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains numerous links, many pointing to compromised CMS upload storage, and employs urgency lures and visual download buttons to trick users. The primary attack pattern involves directing users to download a secondary payload from URLs such as 'https://pixomot.ru/uplcv?utm_term=ok+ko+lakewood+plaza+turbo+apk'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9948

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.
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://pixomot.ru/uplcv?utm_term=ok+ko+lakewood+plaza+turbo+apk PDF link annotation
    • http://cameronhaddock.com/wp-content/plugins/formcraft/file-upload/server/content/files/16135e6dc846c9---powodutimilikejex.pdfIn PDF document text
    • https://florissantdesign.nl/docs/Image/file/fekapaju.pdfIn PDF document text
    • http://cameranichietsu.com/luutru/files/33604321856.pdfIn PDF document text
    • https://doitsolutions.co/wp-content/plugins/super-forms/uploads/php/files/fb8439a1738043dd6071cd98e8b4f59b/walulurilo.pdfIn PDF document text
    • https://mehregancenter.ir/images/upload/files/99818393588.pdfIn PDF document text
    • https://retake.dk/ckfinder/userfiles/files/20404010402.pdfIn PDF document text
    • http://studioprogettoarchitettura.eu/userfiles/files/lurapafafezupopolusepale.pdfIn PDF document text
    • https://pensiuneavalentina.ro/app/webroot/file/39604999846.pdfIn PDF document text
    • http://irk-yoga.ru/upload/files/jomujavapazojaz.pdfIn PDF document text
    • https://sportsslife.net/upload/ckfinder/files/92361032496.pdfIn PDF document text
    • http://kartywspomnien.pl/uploads/assets/file/lepiwelunaj.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/18437858442.pdfIn PDF document text
    • http://jcnjl.com/userfiles/files/jawumujuf.pdfIn PDF document text
    • http://tmtechvn.com/webroot/img/files/tebaxum.pdfIn PDF document text
    • http://conblocmanado.com/pics/file/22314085060.pdfIn PDF document text
    • http://marathon-gexin.com/Uploadfiles/files/97892157881.pdfIn PDF document text
    • http://domainecomps.com/documents/files/40637292001.pdfIn PDF document text
    • http://www.pirac.org/wp-content/plugins/super-forms/uploads/php/files/458621bf74f760fa4afc02733e4258a1/42133331801.pdfIn PDF document text
    • http://ciarajewellery.com/editor_upload/file/nowom.pdfIn PDF document text
    • https://www.northamericatalk.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613558e67324a---59980092560.pdfIn PDF document text
    • https://binarbaidrealestate.com/public_html/userfiles/file/jemironowejetetepij.pdfIn PDF document text
    • http://myconnect-thailand.com/image/upload/File/71099545869.pdfIn PDF document text
    • http://seattlebestteriyaki.com/uploads/files/95132761955.pdfIn PDF document text
    • http://magicfood-cn.com/files/20210912212607.pdfIn PDF document text
    • 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_off0000c853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC853 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e065.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE065 17196 bytes
SHA-256: c8b9eb464c9f0f7f4bf8a646499532d6828bd785081c7fa1230e606829344797
font_02_sfnt_off00010d14.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10D14 10524 bytes
SHA-256: 2e1119b514d397388665873241e402bbe00bd33e20e6dd2b39b846eaee8a78ad