Malicious PDF — malware analysis report

Static analysis result for SHA-256 edcee9259b2eab58…

MALICIOUS

PDF

100.6 KB Created: 2021-08-08 13:45:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-09-13
MD5: 13e640c3badded2589c74f2356844a43 SHA-1: 40848e9aec39c951e4b6309c4ae070cfac870ec5 SHA-256: edcee9259b2eab58c6d1de542f203a4a3406080a6e33002308ddef683443444d
156 Risk Score

Malware Insights

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

This PDF file contains a large number of external links, many of which point to compromised websites or disposable hosting, indicating a link farm designed to redirect users. The ML classifier and ClamAV detection strongly suggest malicious intent, likely phishing or malware distribution. No scripts were extracted, but the presence of numerous URLs and the 'PDF_SEO_DISPOSABLE_LINK_FARM' heuristic point to a malicious redirection scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9901

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://chcial.ru/uplcv?utm_term=injustice+mobile+hack+2019 PDF link annotation
    • https://pacantioquia.org/aym_image/files/deroxibifusumifurikonof.pdfIn PDF document text
    • http://c2mag.com/wp-content/plugins/formcraft/file-upload/server/content/files/160bfbb0da31b8---69946747554.pdfIn PDF document text
    • https://floraplant.gr/FCKeditor/userimages/file/pazupoge.pdfIn PDF document text
    • https://theemperorsoldclothes.co.uk/wp-content/plugins/super-forms/uploads/php/files/vegn1ldhmjtq82kcih3bvsfls4/64042769507.pdfIn PDF document text
    • https://agronlogistics.com/userfiles/files/zidulepevifakiximikanudir.pdfIn PDF document text
    • http://modra-skola.cz/userfiles/file/govekixu.pdfIn PDF document text
    • http://traviet36.com/upload/files/xebodawuwokumupap.pdfIn PDF document text
    • https://www.cdscabling.co.uk/wp-content/plugins/formcraft/file-upload/server/content/files/160767394a85c7---57477900738.pdfIn PDF document text
    • https://kes-stv.ru/wp-content/plugins/super-forms/uploads/php/files/8047a550cd517c824e6a923c5e753026/liwifujazejame.pdfIn PDF document text
    • http://hilltop1976.com/clients/24685/File/duvomavejegenowo.pdfIn PDF document text
    • https://agrotehholding.ru/wp-content/plugins/super-forms/uploads/php/files/335914ae65a659fb3299e8a64aee2a35/25352772851.pdfIn PDF document text
    • https://www.themeshcowork.com/wp-content/plugins/super-forms/uploads/php/files/3a81462c2ce830bcf591967d56dc3c50/nixetotapivunigara.pdfIn PDF document text
    • http://interwork.sk/userfiles/file/60969982055.pdfIn PDF document text
    • http://natpuedu.in/userfiles/file/befiga.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160afd1fa386b7---11349864605.pdfIn PDF document text
    • http://informerfitness.com/wp-content/plugins/super-forms/uploads/php/files/28ea1d4361ba3f0147a60502fd231a83/35406802520.pdfIn PDF document text
    • https://gdr.co.il/wp-content/plugins/super-forms/uploads/php/files/a456fab247b7c79b969fd522872c7534/75729022406.pdfIn PDF document text
    • https://studiogreenwich.ru/wp-content/plugins/super-forms/uploads/php/files/d9c9b5cf069aec267edd0f831e32dd16/tilimuwuremivuw.pdfIn PDF document text
    • http://sahrugs.com/userfiles/file/serupazakevutibasoloxokum.pdfIn PDF document text
    • http://grupophi.es/uploads/files/23865943567.pdfIn PDF document text
    • http://luvnchrlysenglishtoys.com/clients/861429/File/rogizukimomun.pdfIn PDF document text
    • https://www.lowdoc-loans.com.au/wp-content/plugins/formcraft/file-upload/server/content/files/160e60a34670f8---zusugibugixaxanufirejox.pdfIn PDF document text
    • https://alarrabnews.com/images/content/content/file/tejemosarikuseruxime.pdfIn PDF document text
    • http://www.luminicaambiental.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607dfc0eb0505---6084825905.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/82110531848.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/nuq0oa4pjlehje7rcbg3uctk16/dezuginipelibejabegefarew.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_off00012199.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12199 17992 bytes
SHA-256: 3430801464da1656b602f5960360ddffebe32cb0e4e32ebc5e950ad9a418f846
font_01_sfnt_off0001516e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1516E 11272 bytes
SHA-256: c07f2e181805b569d960f7b32b538fe852cb9eeab10b2cae967ca97d5b96d9b3
font_02_sfnt_off00016bc6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16BC6 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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