Malicious PDF — malware analysis report

Static analysis result for SHA-256 2b080d58e16a6d3d…

MALICIOUS

PDF

81.6 KB Created: 2021-09-18 11:02:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-26
MD5: 9882e44d53a3e5f7b635c9fce95604bc SHA-1: dee29f6c12df13d06dfeaf17b829dbb6a8e20ec0 SHA-256: 2b080d58e16a6d3d5acf8008e786e982f15ef71682ff6249eaf31b8b19f4d013
126 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains numerous embedded URLs, many of which point to disposable domains or link farms, indicating a phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a malicious document designed to redirect users to potentially harmful websites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9911

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://ketchas.ru/uplcv?utm_term=pixel+lock+screen+widget PDF link annotation
    • https://noticky.net/akce/fotky/file/kefizenelamowedoj.pdfIn PDF document text
    • http://www.europesolidaire.eu/userfiles/files/44766039069.pdfIn PDF document text
    • https://jimsdelibrookhaven.com/demo/jimsdeli/admin/userfilesfile/dolukuvimodilibureralemum.pdfIn PDF document text
    • http://palenice.net/obrazky_clanky/file/vikubediroxobab.pdfIn PDF document text
    • http://socialbomjesus.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/161450cb34c44b---53548796996.pdfIn PDF document text
    • http://erkerlaender.de/wp-content/plugins/formcraft/file-upload/server/content/files/1613c47ba8e3e5---80376119979.pdfIn PDF document text
    • https://worldtradezone.com/userfiles/file/buvosomumamivupigeto.pdfIn PDF document text
    • http://globalone-mould.com/gbw/fckfiles/20210912084839.pdfIn PDF document text
    • http://tractortools.cz/ckfinder/userfiles/files/movuxuzejodosoz.pdfIn PDF document text
    • http://stmrcstvm.com/userfiles/file/gugibotututosu.pdfIn PDF document text
    • https://linhngapt.vn/upload/files/81604334364.pdfIn PDF document text
    • https://hiddencliff.kr/FileData/ckfinder/files/20210909_7867D9CEEF9C5F94.pdfIn PDF document text
    • http://rockycheng.com/ckfinder/userfiles/files/zuvekori.pdfIn PDF document text
    • http://vo23.ru/upload/file/30514407412.pdfIn PDF document text
    • http://tikatalog.sk/_files/file/7797413358.pdfIn PDF document text
    • http://vetcasatenovo.it/userfiles/files/vetojoruvipunelekulu.pdfIn PDF document text
    • http://trackeg.com/en/wp-content/plugins/formcraft/file-upload/server/content/files/161444ad6ca1c4---2917398655.pdfIn PDF document text
    • http://cieplej.pl/imgturysta/file/32489380220.pdfIn PDF document text
    • http://huyndaicaudien.com/upload/files/58580837607.pdfIn PDF document text
    • https://www.bevillelecomte.com/ckfinder/userfiles/files/45509362235.pdfIn PDF document text
    • http://silverspringabw.com/uploads/files/58571799058.pdfIn PDF document text
    • https://goacetours.com/ckfinder/userfiles/files/jurovagivoxasoguve.pdfIn PDF document text
    • http://burelomdo.com/ckfinder/userfiles/files/fubitixuxi.pdfIn PDF document text
    • https://buka.ru/sadm_files/6765140087.pdfIn PDF document text
    • http://fli.edu.mn/ckfinder/userfiles/files/18673537003.pdfIn PDF document text
    • http://montpellier-business-plan.fr/mbp/upload/images/images/upload/ckfinder/kodexujepoferurebajemoge.pdfIn PDF document text
    • http://bgindus.com/t/tutorfirm/uploads/ck/files/xujesimarada.pdfIn PDF document text
    • http://giasuthanhdat.vn/Images_upload/files/volemirakujopide.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_off0000dbcf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDBCF 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f3e6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF3E6 10664 bytes
SHA-256: 78e3d57a9c208d4df8e965136de955e2c4b548407ad41153e4ac305f7fa8be78
font_02_sfnt_off00010c51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10C51 17300 bytes
SHA-256: 5a2cb0eeccad5ea6f6a72ca73a20e61a83c17067f016e25f5f7a5056f79315aa