Malicious PDF — malware analysis report

Static analysis result for SHA-256 d889cec249382807…

MALICIOUS

PDF

96.3 KB Created: 2021-07-16 06:50:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-14
MD5: 2a7ce718bcc07b156f81766ac3e6b048 SHA-1: 999e0dfd59ea9b34a9a957c13e48ba42db35d392 SHA-256: d889cec2493828074687cf97704a3dfedcc3a8db158799175e7e6b5e5feaa0f8
172 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to compromised WordPress sites, suggesting a link farm designed to redirect users to malicious content. The presence of 'invoice' and 'payment' lures, combined with the ML classifier and ClamAV detection, strongly indicates a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of malicious intent, likely serving as a lure for further compromise.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9957

Heuristics 8

  • 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.
  • 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
  • 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 https://goldenparadisestsimons.com/wp-content/plugins/super-forms/uploads/php/files/cae97f045d0555dd9bfd327b70c7870d/zivikitetowo.pdf In PDF document text
    • http://xn--42-6kcdlkbomh7beggito5p.xn--p1ai/userfiles/file/29904795046.pdfIn PDF document text
    • http://admio.ru/wp-content/plugins/formcraft/file-upload/server/content/files/16089c4d04698a---85082100502.pdfIn PDF document text
    • https://snqrsl.quebec/upload/editor/file/70730020032.pdfIn PDF document text
    • http://www.kissdocs.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160aa5635f3cba---84158509864.pdfIn PDF document text
    • http://aleeblog.com/wp-content/plugins/super-forms/uploads/php/files/834cj2s51odp3nps50lfmi4g55/zoruxarukaruwumepip.pdfIn PDF document text
    • https://baodinhsolar.com/wp-content/plugins/super-forms/uploads/php/files/e86bsset11ksofgat6pa5cl2r2/nasomegejasozuluwe.pdfIn PDF document text
    • https://www.euroservicemilano.it/wp-content/plugins/formcraft/file-upload/server/content/files/1607fe2093cb0e---sanikereganewenikijaw.pdfIn PDF document text
    • https://nezrenpin.com/calisma2/files/uploads/jomipededisibusamaza.pdfIn PDF document text
    • http://adhdadvisory.com/wp-content/plugins/formcraft/file-upload/server/content/files/160834e21383d9---66884186715.pdfIn PDF document text
    • https://www.frankreich-ferien.ch/wp-content/plugins/formcraft/file-upload/server/content/files/1608570de92d41---tedivezepetivabup.pdfIn PDF document text
    • https://loan-financial.com/wp-content/plugins/super-forms/uploads/php/files/c1fc00dbb07cb75aeec0eae829be45ba/43646387584.pdfIn PDF document text
    • https://campermagazine.tv/public/file/danitoxujagefafibo.pdfIn PDF document text
    • https://orkhaconstruction.com/wp-content/plugins/super-forms/uploads/php/files/0oi2b1f8rbn7slobevr3ma72de/57278829816.pdfIn PDF document text
    • https://123kozijnofferte.nl/wp-content/plugins/super-forms/uploads/php/files/opgap38jilmb7u3c0nl2strth2/barejalapojonekemiki.pdfIn PDF document text
    • http://historia-bfured.hu/userfiles/file/soberev.pdfIn PDF document text
    • https://carstenrath.com/wp-content/plugins/super-forms/uploads/php/files/mf1rv9v8eoocdlb33nnkm9udrs/bunowegopinewu.pdfIn PDF document text
    • http://concilianavarra.com/userfiles/files/dolerogaguf.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/redagugelo.pdfIn PDF document text
    • http://terapie-psi.ro/wp-content/plugins/formcraft/file-upload/server/content/files/16096d1374d511---fufegupolamuridadexutafi.pdfIn PDF document text
    • http://danguykhoidoanhnghiephp.vn/Upload/files/65997502001.pdfIn PDF document text
    • http://escolacaritas.com/wp-content/plugins/formcraft/file-upload/server/content/files/16090bb5c68237---ruvuza.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=construction+companies+accounting+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_off000115ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x115EE 11048 bytes
SHA-256: 1a33f019524769b75a986a881314fe3a89a536b8fc1f1cc9dbeda22cab874543
font_01_sfnt_off00012f7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12F7F 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00014791.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14791 17036 bytes
SHA-256: f42036ca7cfca7d3a6ba9f2a3397a0cfe274b9dcfb3aa3fc2e95d3fdfd8a83c1

Open this report in the interactive analyzer, or submit your own file for analysis.