Malicious PDF — malware analysis report

Static analysis result for SHA-256 2fdbec217d23df5a…

MALICIOUS

PDF

78.6 KB Created: 2021-08-23 12:08:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-16
MD5: 57d5a9d73f36c7eebbd8ed94881a9bb4 SHA-1: 24c8a492867cfece5887148cce4bafd8181b428c SHA-256: 2fdbec217d23df5a83b8cdbd011f62acb6702c14b65dbcbdf15cf2475c6eb718
156 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged by multiple heuristics and a machine learning classifier as malicious. It contains numerous links pointing to compromised websites and disposable hosting, indicating a link farm designed to redirect users to malicious content. The presence of external URIs and the overall structure suggest an attempt to lure victims to phishing or malware distribution sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

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://smidgel.ru/uplcv?utm_term=chances+of+having+another+subchorionic+hemorrhage PDF link annotation
    • https://pfhotel.gr/ckfinder/userfiles/files/48581589658.pdfIn PDF document text
    • https://www.pharmaright.ca/wp-content/plugins/super-forms/uploads/php/files/mkd2cvch2a0ehhm33pt094it1j/zevajakepovugobefufew.pdfIn PDF document text
    • http://applecentervn.com/uploads/image/files/71981083707.pdfIn PDF document text
    • https://mission4recruitment.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609839cc49d5f---fedejinejawa.pdfIn PDF document text
    • http://www.enfersalus.com/ckfinder/userfiles/files/37913903482.pdfIn PDF document text
    • http://jyjwqj.com/uploadfile/file///2021073003023632.pdfIn PDF document text
    • http://faw-asia.com/image/upload/files/jimigajakijegebaxegivaze.pdfIn PDF document text
    • https://iamtimeshare.com/userfiles/file/14892274944.pdfIn PDF document text
    • https://www.sidertest.it/wp-content/plugins/formcraft/file-upload/server/content/files/160ec4af584188---biwagunefevenedusab.pdfIn PDF document text
    • http://akicgiyim.com/userfiles/file/futagobowag.pdfIn PDF document text
    • http://www.mearesandassociatesllc.com/siteuploads/editorimg/file/16928708175.pdfIn PDF document text
    • http://www.akutrans.com/wp-content/plugins/formcraft/file-upload/server/content/files/160be23a63e6c0---lamigofamenaramixobubul.pdfIn PDF document text
    • https://europeancustomtailor.com/wp-content/plugins/super-forms/uploads/php/files/a6328b20577e510c05a6ac2f61346af7/tozowisofet.pdfIn PDF document text
    • https://home18.ru/wp-content/plugins/super-forms/uploads/php/files/60dd6dc9e52e3e651f2787a5b5c839f6/50384524012.pdfIn PDF document text
    • https://ihotel2b.com/upfiles/editor/files/33872906317.pdfIn PDF document text
    • https://biomedchita.ru/imeg_master/file/35520392548.pdfIn PDF document text
    • https://2-view.org/home/view/public_html/ckfinder/userfiles/files/77244836387.pdfIn PDF document text
    • http://hoya-system.com/uploads/files/202108161842306521.pdfIn PDF document text
    • https://ncfouting.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e1878b5cb8---tojimomedo.pdfIn PDF document text
    • https://alismobile.co.uk/wp-content/plugins/super-forms/uploads/php/files/bbb964ddc51011d5f1ff8e361a278d25/zazuwaviwabulo.pdfIn PDF document text
    • https://regeneracion-capilar.com/wp-content/plugins/super-forms/uploads/php/files/83d36b61d4b04af0bb8904c90dd19950/84193099753.pdfIn PDF document text
    • http://xn--aknmedcal-wpbe.com/uploads/file/tadeg.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_off0000cde1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCDE1 16988 bytes
SHA-256: cdef5c79d23516d6ad77c38bb41ba0883cec2f6a5747307785e118ce633b9bd7
font_01_sfnt_off0000fa72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA72 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00011289.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11289 11072 bytes
SHA-256: 0d6cf7a11d5531d528cf2004889a0fbb848f08b500f60436fc968012d4944777

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