Malicious PDF — malware analysis report

Static analysis result for SHA-256 940d9346126b8c31…

MALICIOUS

PDF

79.0 KB Created: 2021-09-07 03:35:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 7a33754e285f5414afad0e1c1856948f SHA-1: cee13446b22e3504f5d6f778edbae6528d69f590 SHA-256: 940d9346126b8c3152b727813794e9f29480c780e85e6b1f0eebefe6861f0d48
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains a link farm with numerous URLs pointing to compromised WordPress sites and disposable hosting. The ClamAV detection indicates it is a phishing trojan. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it is designed to lure users to malicious sites, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4210

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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
  • 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://drafthe.ru/uplcv?utm_term=lifelong+learning+skills+pdf PDF link annotation
    • https://stakeoutllc.com/wp-content/plugins/super-forms/uploads/php/files/ec780f384f074399633464b40aa5e5a8/pedagusiberoxesiwipuvule.pdfIn PDF document text
    • http://filtrydokoparek.pl/img/all/71158086422.pdfIn PDF document text
    • http://kirks-pool.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bb899693bee---guxatid.pdfIn PDF document text
    • http://centrlita.ru/archive/image/file/59252971075.pdfIn PDF document text
    • http://clingac.com/d/files/86496807523.pdfIn PDF document text
    • http://freemansphotography.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b34e6bdb8a---vanizilulipeg.pdfIn PDF document text
    • https://gaziemirkentkonseyi.com/upload/files/tiriwidofa.pdfIn PDF document text
    • https://alkhairi.co.uk/wp-content/plugins/super-forms/uploads/php/files/162fcb4074eab2345b1342ed64878068/nomefupewawa.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/160b52a99c3696---kipabemiferakanide.pdfIn PDF document text
    • http://gloria-eurex.com/images/blog//file/salofesurokaseruku.pdfIn PDF document text
    • https://hpx.com.ua/wp-content/plugins/super-forms/uploads/php/files/7cef794d8cc3ebe74eaaf9c0d118b121/runamalumetilunofan.pdfIn PDF document text
    • http://remontnoedelo.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1606ce49dd2b77---37599920603.pdfIn PDF document text
    • http://xn----8sbpvg0afdbe.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/r1rjj69s9prek8qh0ccbh9trv4/dubibaxopozuwisututa.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/nevusisox.pdfIn PDF document text
    • http://goref.ru/files/file/mapesekivokitijekik.pdfIn PDF document text
    • http://blog.crowdly.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607b20820d428---palebopebu.pdfIn PDF document text
    • https://puppometalli.eu/file/wisixad.pdfIn PDF document text
    • http://ziguratex.com/helpdesk/app/webroot/img/userfiles/files/46081642975.pdfIn PDF document text
    • https://www.endthestigmacounselling.com/wp-content/plugins/super-forms/uploads/php/files/fjj54tk9ts8mvn9qf1gsarirtv/37347452321.pdfIn PDF document text
    • http://www.auditsi.com/wp-content/plugins/formcraft/file-upload/server/content/files/16072d88177f39---79454495595.pdfIn PDF document text
    • https://iamluno.com/wp-content/plugins/formcraft/file-upload/server/content/files/1610f5166685f3---rexufisutawigomasinemal.pdfIn PDF document text
    • http://ptairsupply.com/userfiles/file/bexujebi.pdfIn PDF document text
    • https://www.web2business.pt/wp-content/plugins/formcraft/file-upload/server/content/files/1609e716ae48ae---jirovofumo.pdfIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f425.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF425 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off00010c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C3C 10624 bytes
SHA-256: 32af182eb40e263a6ae716b5fd904a499b0495fec2a58728d1b265a28626154f

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