Malicious PDF — malware analysis report

Static analysis result for SHA-256 e0411f96322b453b…

MALICIOUS

PDF

80.7 KB Created: 2021-09-02 08:12:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-05
MD5: 8c1b0e9326b7d34dcb892d42c3928a69 SHA-1: 0537ff9c09faa35a5c6ad93f9c7448c95efba87d SHA-256: e0411f96322b453b4af5f3431830cb9dbe98b5384444911a178410c9b6f123d5
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.001 User Execution: Malicious Link

The PDF contains numerous links pointing to compromised CMS uploads and disposable hosting domains, indicative of a link farm designed to redirect users to malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely for phishing or malware distribution. Although no scripts were directly extracted, the PDF structure and embedded URLs are sufficient evidence of a malicious campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9989

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://synerhu.ru/uplcv?utm_term=all+muscle+legends+codes PDF link annotation
    • https://relaxbotanika.cz/ckfinder/userfiles/files/bipigivexelim.pdfIn PDF document text
    • https://vetranhtuongmamnon.vn/wp-content/plugins/super-forms/uploads/php/files/hane8v5qldvmf670rs4b014muj/valukulifawodulari.pdfIn PDF document text
    • http://www.rebranded.tv/wp-content/plugins/formcraft/file-upload/server/content/files/160b7450f9895c---28782180842.pdfIn PDF document text
    • https://terminal.hr/userfiles/file/kitekevuloweduw.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/16111179837b71---mazoverelimiga.pdfIn PDF document text
    • http://mploa.com/clients/2/2c/2ccb326c3583e393996f575e36ee3974/File/14254147554.pdfIn PDF document text
    • http://abwpetersburg.com/uploads/files/lusiwezerusuja.pdfIn PDF document text
    • http://abwcoliseum.com/uploads/files/vutekatafabaritomus.pdfIn PDF document text
    • https://www.pal-kont.hu/wp-content/plugins/super-forms/uploads/php/files/8a3af8403dd5e82bd5a59ba1dcb9fd1f/dobovafuvoxekajegi.pdfIn PDF document text
    • https://autosaloncenter.com/uploads/file/64706415428.pdfIn PDF document text
    • http://www.hptindia.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608c065121259---nawinenubosel.pdfIn PDF document text
    • http://foto-recepty.sk/images/fotky/godopiwazoz.pdfIn PDF document text
    • http://sistarelaw.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/7940925339.pdfIn PDF document text
    • http://leaguengn.com/userfiles/file///1838894119.pdfIn PDF document text
    • http://xn--90ad5ackt1d.xn--p1ai/wp-content/plugins/super-forms/uploads/php/files/eeb63f2962fa5a26dce3435bc73b9563/wikedibogatewuligatopusos.pdfIn PDF document text
    • http://karlsbach.de/userfiles/files/muvululofo.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/pijefemodumid.pdfIn PDF document text
    • http://nccutrackandfieldnation.com/clients/2/2c/2cea5a7e730406ee40dfbbde6098010c/File/nenawokelubojepuximefexo.pdfIn PDF document text
    • http://wahluenfty.com/userfiles/26759998978.pdfIn PDF document text
    • http://fdscience.com/UPFILE/userfiles/files/dutopezexusep.pdfIn PDF document text
    • https://www.vbclighting.com/wp-content/plugins/super-forms/uploads/php/files/1d1d89166dcc13759d8add54fcf66364/wumuz.pdfIn PDF document text
    • http://www.festivalmarrakech.info/wp-content/plugins/formcraft/file-upload/server/content/files/160cdced36f1d8---55670328925.pdfIn PDF document text
    • http://www.neoneofitou.com/ckfinder/userfiles/files/57262029332.pdfIn PDF document text
    • http://azstorestudio.com/uploads/files/55498825533.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

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d7e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7E5 10340 bytes
SHA-256: 3c3a7b45190fec9d0aeb159349b1f8aa10e9d2ad8ecafbb13412ef1d71781a22
font_01_sfnt_off0000ef02.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEF02 17588 bytes
SHA-256: 2fe92776446f3f678c58e6b2298775ce254d36026f5d679c915a8bf960eb2322
font_02_sfnt_off00011c88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11C88 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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