Malicious PDF — malware analysis report

Static analysis result for SHA-256 b98c2544b17d55b8…

MALICIOUS

PDF

251.1 KB Created: 2021-08-14 06:24:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 7a726b3f7985f01e1022015cee804af8 SHA-1: 95aabae0226fddcb235849e990b461ff57463216 SHA-256: b98c2544b17d55b8bd903278eec2335e71935aebcff0e1403e1bf41530e6c13e
174 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The ML classifier and ClamAV detection strongly indicate maliciousness. The heuristics identify this PDF as a brand-impersonation credential phishing lure, specifically mentioning 'dHL', and also as a fake invoice or payment lure. The document contains numerous links, several of which point to compromised WordPress upload storage, suggesting an attempt to redirect users to malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9028

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+writing+report+example.
  • 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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.aqsclimited.com/EditorImages/file/tivesenoverofadibijepig.pdf In PDF document text
    • https://ajwatravel.com/wheelmarine/userfiles/file/fonaseselibidu.pdfIn PDF document text
    • https://www.asahinadigital.com/wp-content/plugins/super-forms/uploads/php/files/cd7dvb6os7adav16qk7s0smcsn/wawonivozewomafowunud.pdfIn PDF document text
    • http://theartofdesign.nl/ckfinder/userfiles/files/xadesiwedutawu.pdfIn PDF document text
    • https://africanresearchcenter.com/userfiles/file/22407841443.pdfIn PDF document text
    • http://ahoba85.com/clients/2/26/26d353b61ac95a99d7df5001a3d58300/File/foruvusepiziwun.pdfIn PDF document text
    • https://bawaniint.com/ckfinder/userfiles/files/39782746420.pdfIn PDF document text
    • http://abwplazaview.com/uploads/files/jisikazu.pdfIn PDF document text
    • http://tumwebthailand.com/ckfinder/userfiles/files/16259921560.pdfIn PDF document text
    • http://ourgans.org/userfiles/files/34866549677.pdfIn PDF document text
    • http://for-rent-leuven.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606f6056e40e1---saxipikukupokofogima.pdfIn PDF document text
    • http://seoulgreeter.com/userData/board/file/1827898269.pdfIn PDF document text
    • http://nitecoreromania.ro/files/file/dexelodopanimabatemoroj.pdfIn PDF document text
    • http://woodwork.pl/ubezpiecz/obrazy/file/gopapanoxezititivojop.pdfIn PDF document text
    • https://rockdental.co.uk/wp-content/plugins/super-forms/uploads/php/files/4e4edf65ccf3df5f9a5561fb011763c1/woxupebuv.pdfIn PDF document text
    • https://humble-brag.com/wp-content/plugins/super-forms/uploads/php/files/omina1ecn1706djcpgtiim3rg7/28540760242.pdfIn PDF document text
    • http://discoveryenglish.org/wp-content/plugins/formcraft/file-upload/server/content/files/160edc3247e66b---nekepokejulisokiwunofabor.pdfIn PDF document text
    • http://omniatel.it/wp-content/plugins/formcraft/file-upload/server/content/files/160764339a51cf---wagalutojunisujomodowi.pdfIn PDF document text
    • http://www.dadosefatos.net.br/wp-content/plugins/formcraft/file-upload/server/content/files/1608f1b7f50af2---90849161043.pdfIn PDF document text
    • https://www.burit.net/wp-content/plugins/formcraft/file-upload/server/content/files/160fdf57acdc40---40990608956.pdfIn PDF document text
    • http://tea-ra.com/user_data/upload/save_image/files/berakovezipitusajaru.pdfIn PDF document text
    • http://philippinesroadshow.com/wp-content/plugins/super-forms/uploads/php/files/855154b7f8986e4df7f183577ee70d00/66888531734.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160ac13c328165---jufadilenono.pdfIn PDF document text
    • https://www.eecpowerindia.com/codelibrary/ckeditor/ckfinder/userfiles/files/jajiza.pdfIn PDF document text
    • http://ukonlinedirect.com/userfiles/files/nomulojuseporabag.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/ngfLrbzwjls/uplcv?utm_term=how+to+writing+report+examplePDF 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_off00037d2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x37D2F 17896 bytes
SHA-256: a41d5ef1edd4d387c059a62aa0f36c2c67647b3d19a6494ab19761324ce59b89
font_01_sfnt_off0003ac66.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3AC66 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0003c47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3C47D 10608 bytes
SHA-256: b6f3c66104f65de8a21c4093af4221f20044fdd8141bcfb45c748b3b17315244