Malicious PDF — malware analysis report

Static analysis result for SHA-256 8ed691594e9bfe8a…

MALICIOUS

PDF

71.3 KB Created: 2021-09-27 11:26:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: be74773474f089f2487bce131dac2fbc SHA-1: 9da147c3199fb8c8db4ce18e9ab1a26a0f597438 SHA-256: 8ed691594e9bfe8a0d05fe9940d26de6fcd5f87ae1009b43c0e76b3f0d961f5f
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file was flagged by ML classifiers and ClamAV as malicious, specifically as a phishing trojan. It contains numerous external URIs and is identified as a link farm hosted on disposable domains, indicating a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and numerous embedded URLs suggest it is designed to redirect users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9951

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 https://wastran.ru/uplcv?utm_term=how+to+make+android+vibrate+continuously PDF link annotation
    • https://nayyaralidada.net/alpha/ckfinder/userfiles/files/53181574020.pdfIn PDF document text
    • https://whereestar.com/marinarubicon/admin/file/27565108063.pdfIn PDF document text
    • https://ttablaksystem.hu/files/file/12102112655.pdfIn PDF document text
    • http://ecocj.com/userfiles/file/20210924084744.pdfIn PDF document text
    • http://www.tahi.hu/ckfinder/userfiles/files/47616642354.pdfIn PDF document text
    • https://fokusmedia.com/images/uploads/bebidakoxofalefirariwe.pdfIn PDF document text
    • https://tecnomatec.cl/upload/file/50719419253.pdfIn PDF document text
    • https://hainutedecopii.eu/ckfinder/userfiles/files/donajixutikosige.pdfIn PDF document text
    • http://svs-pm.com/wp-content/plugins/formcraft/file-upload/server/content/files/161477fcd578a2---76199653813.pdfIn PDF document text
    • http://zzquansu.cn/d/files/70926380117.pdfIn PDF document text
    • http://topopentertainment.com/wp-content/plugins/formcraft/file-upload/server/content/files/161384ddb8ac27---palajesazutipulevizun.pdfIn PDF document text
    • https://irish-setter-zucht.info/ckfinder/userfiles/files/30303924344.pdfIn PDF document text
    • https://myclubowners.travelenvogue.com/userfiles/files/kovibu.pdfIn PDF document text
    • http://domoticasociale.it/immaginiNewsletter/file/tafixuniponekikuzi.pdfIn PDF document text
    • https://servauto.fr/img/user/file/16457475131.pdfIn PDF document text
    • http://szyldkj.com/luodan/images/userfiles/file/20104303943.pdfIn PDF document text
    • https://tttinox.com/upload/userfiles/files/piwefana.pdfIn PDF document text
    • http://advairtech.eu/assets/userfiles/file/86435507278.pdfIn PDF document text
    • https://pagodatalk.com/_UploadFile/Images/file/lifutudipakogon.pdfIn PDF document text
    • http://poiskvod.ru/images/file/70259960642.pdfIn PDF document text
    • http://biggedefense.com/userfiles/file/65607510312.pdfIn PDF document text
    • http://cowmoo.org/ckfinder/userfiles/files/fudagenomadolag.pdfIn PDF document text
    • http://hylimusic.com/fckeditor/editor/filemanager/connectors/php/userfiles/file/wazofidadof.pdfIn PDF document text
    • http://numere-mopede.ro/mm/file/gukob.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_off0000b0e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB0E8 11120 bytes
SHA-256: 169c0f76285e7eb09267135168c6c09cb56837b7b03d6a20b31041a2ee4672d6
font_01_sfnt_off0000cada.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCADA 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off0000e2ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2EC 17540 bytes
SHA-256: 931b2c0289d343d7d8cfa2dc97a5f9de7042fe428e3a1245624cf3f336507932

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