Malicious PDF — malware analysis report

Static analysis result for SHA-256 7692156fa96d0e3e…

MALICIOUS

PDF

80.2 KB Created: 2021-09-15 10:06:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-07
MD5: d22b92713050c6daf5a7d6a4edf0747d SHA-1: 95af54c44c0e9dc556bd97fcb029c9602e9d044d SHA-256: 7692156fa96d0e3e439ff54a980d83049e18c2ba1313a08f89a845cb2ef14ad4
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains embedded JavaScript and numerous external links, many pointing to compromised websites or disposable hosting. The heuristic PDF_SEO_DISPOSABLE_LINK_FARM indicates a link farm designed to manipulate search engine results or direct users to malicious content. The embedded JavaScript likely facilitates the redirection or further malicious activity. The ClamAV detection and ML classifier strongly indicate malicious intent, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9953

Heuristics 7

  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://oniceh.ru/uplcv?utm_term=after+dark+my+sweet+full+movie+online+free PDF link annotation
    • http://ekvatorbl.com/userfiles/file/bokogipobikexuvewudukelig.pdfIn PDF document text
    • http://changwontour.kr/FileData/ckfinder/files/20210909_D9F18E8ED828847D.pdfIn PDF document text
    • http://alfonsoguiggiarchitetto.it/userfiles/files/xobedasimunimena.pdfIn PDF document text
    • https://amagi.la/wp-content/plugins/formcraft/file-upload/server/content/files/1613d5c4915b03---12307480378.pdfIn PDF document text
    • http://lemonsport.hu/upload/file/38183547418.pdfIn PDF document text
    • https://taiwan-tiaya.com/upload/tiaya_official/files/widab.pdfIn PDF document text
    • https://victory-agency.com/wp-content/plugins/formcraft/file-upload/server/content/files/161357b7161dc4---15695181014.pdfIn PDF document text
    • http://holzbau-napetschnig.at/46663123626.pdfIn PDF document text
    • http://hiace-yoshikawa.com/js/upload/files/18265739048.pdfIn PDF document text
    • http://clean-ecology.com/Upload/files/kutorag.pdfIn PDF document text
    • http://fukaofoods.tw/uploads/files/202109052032065557.pdfIn PDF document text
    • https://enville.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613a21fc26246---53816302126.pdfIn PDF document text
    • https://g-ortho.com.br/wp-content/plugins/formcraft/file-upload/server/content/files/16135585fa592d---3757817908.pdfIn PDF document text
    • https://lixtech.com.tw/ckfinder/ckfiles/files/35224211438.pdfIn PDF document text
    • http://alpha-cp.com/userfiles/file/24862030482.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/judasorefib.pdfIn PDF document text
    • http://jyczgj.com/UploadFiles/file///2021091514095487.pdfIn PDF document text
    • http://www.sunarozlem.com.tr/wp-content/plugins/super-forms/uploads/php/files/a6mg9pa617fpvj7tgrk6qsd1r6/55676385202.pdfIn PDF document text
    • https://wacee.net/wp-content/plugins/formcraft/file-upload/server/content/files/16138984796bd3---64249555302.pdfIn PDF document text
    • https://hcs1000.org/wp-content/plugins/super-forms/uploads/php/files/009b9cda2c7acf5bd406162eeae7ca14/kofuporusijutatu.pdfIn PDF document text
    • https://readxyz.org/wp-content/plugins/super-forms/uploads/php/files/9445e5b19ec10ec7be4683199e850aa4/13696879065.pdfIn PDF document text
    • http://vxclouds.com/userfiles/file/6373639673.pdfIn PDF document text
    • http://www.tempshift.com/app/webroot/files/uploadimagesfile/noxozalademaxatotukafak.pdfIn PDF document text
    • http://rdmsrl.it/userfiles/files/bugire.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_off0000d592.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD592 17300 bytes
SHA-256: 0c4cff4d3d00ba64d1ed9508eeebf972d4b0b1b20be519d5ef45e4a4327185fb
font_01_sfnt_off000101d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x101D7 10956 bytes
SHA-256: c9607cfb5a2ed0edbfe570324669432f44a22e86234813d993cb22f85285e7ab
font_02_sfnt_off00011b5d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11B5D 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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