Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f9e981dc6c3e806…

MALICIOUS

PDF

81.8 KB Created: 2021-09-18 19:03:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 501acf4b391911c733cdcf033005377e SHA-1: 558f66a7a41d6faed8281641017d92341cb0f9b8 SHA-256: 9f9e981dc6c3e8067a9635aacd8bf6b6562e73343420f5fe65fb48fabf80fc92
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The file was detected by ClamAV as Pdf.Phishing.Trojan. It contains a large number of embedded URLs, many of which are linked to disposable hosting or redirectors, indicating a link farm designed to obscure the final destination. The presence of these links suggests the primary purpose is to direct users to malicious websites, likely for phishing or to download further malware.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.2555

Heuristics 4

  • 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
  • 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://csigikes.hu/admin/fck_upload/file/7204989391.pdf In PDF document text
    • http://diagnosticaedilizia.com/userfiles/files/28608323666.pdfIn PDF document text
    • https://alternativi.brtim.com/uploads/wysiwyg/files/masovekenaxi.pdfIn PDF document text
    • http://firegallery.ru/img/upload/78851952297.pdfIn PDF document text
    • https://thietbigas.net/media/files/fosoxojaf.pdfIn PDF document text
    • https://cms.blauraum.com/wp-content/plugins/super-forms/uploads/php/files/704ed95e77a3486788fe4bd6cdf46348/pevixadofomisisi.pdfIn PDF document text
    • https://bunianco.com/other_files/File/jipedaladinukud.pdfIn PDF document text
    • https://mangonebike.com/uploads/file/52025569285.pdfIn PDF document text
    • https://phunhai.net/upload/files/xerixorekefapu.pdfIn PDF document text
    • https://byocamacho.com/ckfinder/userfiles/files/xevawolatodukuxen.pdfIn PDF document text
    • http://hanhthien.net/uploads/file/47938652503.pdfIn PDF document text
    • http://objets.immoweiss.lu/userfiles/files/nezejagevatafujuzijiw.pdfIn PDF document text
    • http://fslawoffice.com/customer/3/d/9/3d947ad6ce2568d98b832ccf5548371bFile/76155899218.pdfIn PDF document text
    • https://mytopics.it/uploads/file/sefesavifen.pdfIn PDF document text
    • http://fabiocaronearchitetto.com/userfiles/files/xamajesixuzewite.pdfIn PDF document text
    • http://www.egavilanes.com/ckfinder/userfiles/files/lexafuxifekubizusaxi.pdfIn PDF document text
    • http://domki-kopalino.pl/pliki/mikeji.pdfIn PDF document text
    • https://mobile-translator.eu/app/webroot/media/files/fuzatifuladazakomerokufen.pdfIn PDF document text
    • http://katyababash.com/images/uploads/file/88059193207.pdfIn PDF document text
    • http://yugreat.com/filespath/files/20210910011619.pdfIn PDF document text
    • http://ttworld.hu/uploads/content_files/files/losibufemibivize.pdfIn PDF document text
    • https://congthuonghotel.vn/app/webroot/files/images/pages/files/wudokupegipaxotosanab.pdfIn PDF document text
    • http://odesignlab.ru/admin/ckfinder/userfiles/files/xifopesasem.pdfIn PDF document text
    • http://businessdevelopmentcenter.pl/uploads/userfiles/files/mamugetotalimemaxujabop.pdfIn PDF document text
    • http://www.sparkprototypes.com/wp-content/plugins/formcraft/file-upload/server/content/files/161409d35c4edc---35605019809.pdfIn PDF document text
    • http://stowarzyszeniemalyksiaze.eu/img/upload/files/22473597387.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/A3Ryygt5BCM/uplcv?utm_term=mugen+train+free+full+movie+hdPDF link annotation
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10A35 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0001224c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1224C 10792 bytes
SHA-256: 6617b919eaf9ceae91882952471301f2b176eae76c7e26226087fedb54b78299