Malicious PDF — malware analysis report

Static analysis result for SHA-256 806e057ed7dbab57…

MALICIOUS

PDF

71.1 KB Created: 2021-09-13 20:20:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 5657f5bfef6b0383438a074cb9b506dc SHA-1: e8bc284d71703f2e69d96baa0c2254bc6be94acc SHA-256: 806e057ed7dbab57c98a362adc33375b227ee7a7abbe899ec7059bc6abe0f355
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF was flagged by multiple heuristics, including ML and ClamAV, as malicious. It contains numerous external links, many of which are part of a link farm on disposable hosting, suggesting a phishing or malware distribution attempt. The presence of embedded URLs and the overall structure indicate it's designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9916

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://huntic.ru/uplcv?utm_term=bodyguard+full+episodes+watch+online+free PDF link annotation
    • http://candleelectricals.com/uploaded_files/userfiles/files/70939877217.pdfIn PDF document text
    • http://spl-designs.com/ckfinder/userfiles/files/ludigoluvavabapewaxedu.pdfIn PDF document text
    • http://educaholistica.com/resources/img/imagesck/files/fapus.pdfIn PDF document text
    • http://yokosohk.com/files/fckfiles/file/82192901563.pdfIn PDF document text
    • http://freetds.net/userfiles/file/59770593996.pdfIn PDF document text
    • http://abpjseah.news-read.com/upload/files/24948856868.pdfIn PDF document text
    • https://aprenda-atdi.com/uploads/files/9375712263.pdfIn PDF document text
    • http://maroba-zirndorf.de/file/14301798126.pdfIn PDF document text
    • https://regenerativetherapyforpain.com/wp-content/plugins/super-forms/uploads/php/files/48bc6e71c7f95838c15cfe31e29a2628/kibixura.pdfIn PDF document text
    • https://flardochform.se/userfiles/file/45983942677.pdfIn PDF document text
    • http://clubsahdianagalati.ro/upload/editor/file/towom.pdfIn PDF document text
    • https://phunhai.net/upload/files/98141010142.pdfIn PDF document text
    • http://belgium-ex.com/images/blog/file/85028048312.pdfIn PDF document text
    • https://kfk-dekoration.dk/images/uploadedimages/file/najipigifoxope.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/gukezafila.pdfIn PDF document text
    • https://cailux.lu/userfiles/files/6282031055.pdfIn PDF document text
    • http://sujitonweb.com/userfiles/files/fijikoviwovelijudimumuwo.pdfIn PDF document text
    • http://monkey-do.net/userfiles/file/95259154272.pdfIn PDF document text
    • http://premo.at/userfiles/file/kinuredolipatadiwevidexel.pdfIn PDF document text
    • https://xn--fct5g39pjpo.tw/upload/leakstop/files/1436403008.pdfIn PDF document text
    • http://okna-kurska.ru/page_edit/_samples/userfiles/files/kasaragowoxad.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613b73b114c19---58686271422.pdfIn PDF document text
    • https://savitravel.ro/ckfinder/userfiles/files/98007693367.pdfIn PDF document text
    • http://yibetter.com/data/files/tutisivexupejenudorexukus.pdfIn PDF document text
    • http://qianlong99.org/ckfinder/userfiles/files/19288684037.pdfIn PDF document text
    • http://mmsmarin.com/imgimage/file/bawinib.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_off0000b57c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB57C 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000cd93.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCD93 11252 bytes
SHA-256: 13cb484681b596e562a5853f4ff6e50ce48d3986fbee6c795af05b6fc3706d5a
font_02_sfnt_off0000e7ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE7CE 15416 bytes
SHA-256: 4730e363db22d8140f20af8a673b6700ec245c72b2eb3cb66a10bb079cebedeb