Malicious PDF — malware analysis report

Static analysis result for SHA-256 d0814fe546453b93…

MALICIOUS

PDF

77.3 KB Created: 2021-09-04 21:10:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-11
MD5: a895ade845f18df19198afb311faabd1 SHA-1: 1ee8211540bc65f7a56a07bf4f4d826b64e1f06a SHA-256: d0814fe546453b936cb8f96282adb2e84564c553487aebe03fd3d87c3112fefb
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains numerous embedded URLs that point to various websites, many of which appear to be compromised or disposable hosting. The ML classifier and ClamAV detection strongly indicate malicious intent, likely for phishing or distributing further malware. The structure suggests a link farm designed to obscure the ultimate destination of the user's click.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • 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://nomylo.ru/uplcv?utm_term=yuvashree+new+list+pdf PDF link annotation
    • http://adainst.com/uploade/files/20210621174844.pdfIn PDF document text
    • https://vinocastillo.hu/editor_up/80474689358.pdfIn PDF document text
    • https://pomacanthe-art.fr/imagebeforeafter/files/kegexonibit.pdfIn PDF document text
    • https://www.intermediastudios.com.mx/wp-content/plugins/super-forms/uploads/php/files/5cc2b300f1e576eb56f2754bf024c0c8/55299462614.pdfIn PDF document text
    • https://teenvolunteerdallas.org/wp-content/plugins/super-forms/uploads/php/files/23c36d78c935a70ae1736d078863223e/72341799430.pdfIn PDF document text
    • http://tv-sat.cz/userfiles/file/12227514340.pdfIn PDF document text
    • https://manorhair.com/uploads//files/202108091956296477.pdfIn PDF document text
    • http://scpt.it/userfiles/files/laguvupazipipelukanij.pdfIn PDF document text
    • http://daimarconstrucciones.com/images/admin/file/wiwezilata.pdfIn PDF document text
    • http://unstitchedfootwear.net/files/file/87837167290.pdfIn PDF document text
    • https://directprocessors.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609a1e6b1ba88---96239510472.pdfIn PDF document text
    • http://barcelonasixtytwo.com/userfiles/file/sulabizog.pdfIn PDF document text
    • https://landbondcorten.com/attachment/file/15d1d1a540a04528d8759a18e913ddf1.pdfIn PDF document text
    • https://iescolumbus.org/wp-content/plugins/super-forms/uploads/php/files/f80b0b89b92a12108dd72ab5c97314ef/jopovifimofagapi.pdfIn PDF document text
    • http://lalitas-thaimassage-spa.de/wp-content/plugins/formcraft/file-upload/server/content/files/16077225d14428---nelarag.pdfIn PDF document text
    • https://nuregio.de/wp-content/plugins/formcraft/file-upload/server/content/files/160fd9ea4cefb2---gupekosurumus.pdfIn PDF document text
    • http://artmetinc.com/wp-content/plugins/formcraft/file-upload/server/content/files/1606eb53d8b7f5---58276222384.pdfIn PDF document text
    • https://igraonica.me/userfiles/file/ziwupisapogowufuku.pdfIn PDF document text
    • https://nada70.org/userfiles/file/wenopenanozomuvixigazivi.pdfIn PDF document text
    • https://dovolena-jiznicechy.cz/uploads/46132964451.pdfIn PDF document text
    • http://skuplaptop.pl/wp-content/plugins/formcraft/file-upload/server/content/files/16070a361967c8---11528276405.pdfIn PDF document text
    • http://drstevealbrecht.com/wp-content/plugins/super-forms/uploads/php/files/4a2033e6f087768fd064b71416d79530/9105545098.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_off0000c96e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC96E 17800 bytes
SHA-256: 12c0086789765865bb56e47906340e63b2ee2078c8b875bd7d348c1f5987455d
font_01_sfnt_off0000f73d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF73D 10712 bytes
SHA-256: 1d263882630edd7f63d7a0bbc05d8ad5c3f9263d29412fd739bfb1f47fb8bd12
font_02_sfnt_off00010fcc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10FCC 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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