Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fbea2e30c6451d1…

MALICIOUS

PDF

74.2 KB Created: 2021-09-23 07:37:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 56a2d0fe8d2fe8b593556d361e5b4799 SHA-1: c0a8cead61db3d673b50ea422ec569143e7e1c1c SHA-256: 8fbea2e30c6451d14be5ebddb17ba5132808b987582a3d1356d9a9344dfaf797
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was identified as malicious by ML classifiers and ClamAV, indicating a phishing or malware distribution attempt. The PDF contains numerous embedded URLs, with many pointing to disposable domains, characteristic of a link farm designed to redirect users to malicious content. Although no scripts were directly extracted, the PDF structure and the presence of many external URIs suggest it's designed to exploit users by directing them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9840

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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 http://nktrading.qa/file/files/kijuzedimem.pdf In PDF document text
    • https://kaparatt.com/images/File/kezon.pdfIn PDF document text
    • https://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/16149ab848ef96---54567623128.pdfIn PDF document text
    • https://avukatwebsitesi.trakyasoft.com/upload/files/febog.pdfIn PDF document text
    • http://influences-vegetales.eu/assets/Image/files/kamuvabodadexi.pdfIn PDF document text
    • http://sevennews.com.br/ckfinder/userfiles/files/75860572978.pdfIn PDF document text
    • http://ahzgbh.news-read.com/upload/files/totogepilisom.pdfIn PDF document text
    • http://xn--m1age8bh.xn--p1ai/files/file/83434249101.pdfIn PDF document text
    • http://guitarenko.fr/img/files/vozobi.pdfIn PDF document text
    • https://ip-pharma.net/data/files/17831271526.pdfIn PDF document text
    • https://matras-matrasych96.ru/admin/ckfinder/userfiles/files/16404937140.pdfIn PDF document text
    • http://geo-equipe.it/userfiles/files/kologosesodukigale.pdfIn PDF document text
    • http://silesiacapital.eu/data/file/98662616821.pdfIn PDF document text
    • http://nomayaku.com/userfiles/file/6078119223.pdfIn PDF document text
    • https://jucariicopilasi.ro/app/webroot/files/userfiles/files/nabaluxofafuzijo.pdfIn PDF document text
    • http://riccaassociati.eu/userfiles/files/39426124928.pdfIn PDF document text
    • https://digbijoynath.in/uploads/userfiles/files/dagetanamuto.pdfIn PDF document text
    • http://smartwealthhk.com/userfiles/97590311308.pdfIn PDF document text
    • http://xn--oy2b19v1mb1yi.com/userfiles/file/sozinoxaluwidatakoweg.pdfIn PDF document text
    • http://psychanalyste-gard.fr/ckfinder/userfiles/files/rebalo.pdfIn PDF document text
    • http://indcms.testingmachines.com/images/file/82952852373.pdfIn PDF document text
    • http://rewitex.pl/userfiles/file/57516937703.pdfIn PDF document text
    • https://zhbiotech.com/CKEdit/upload/files/sedokisuguxojilepirux.pdfIn PDF document text
    • http://jucal.es/images/file/sasafovurelivezeravimuxeg.pdfIn PDF document text
    • https://nutritie-metabolism-sanatate.ro/app/webroot/files/userfiles/files/62788137105.pdfIn PDF document text
    • https://brokenspoke.com/wp-content/plugins/super-forms/uploads/php/files/a8fbfd8959156c2765c12e74ca2c2fb2/dotuwetudofazosetugeju.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/BkSY9tpko7c/uplcv?utm_term=live+moving+nature+wallpaperPDF link annotation
    • 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_off0000be52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE52 10636 bytes
SHA-256: ce4a44ce068e5dec73b63b760fcbee69f2656119d80101858764a8880ed6bf34
font_01_sfnt_off0000d6b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD6B0 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000eec2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEEC2 16528 bytes
SHA-256: 6252ea88fef9e4a8dc66f26a234fc44a56beb57fad49f172edeca15210b7b379