Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0de9aecb9dcfa6f…

MALICIOUS

PDF

64.0 KB Created: 2021-10-06 21:14:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3)
MD5: 9adb4f8c77935ced17e887f5955ec6e0 SHA-1: 13abf029ae56ccfec0cd5d20b98f41f82619ed9d SHA-256: b0de9aecb9dcfa6f5cfc7b83da1ccc60be43553d485ab9a9fee58d1d462c4f1d
124 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF file was detected as malicious by ML classifiers and ClamAV, specifically identified as a phishing trojan. It contains numerous embedded URLs that point to external websites, many of which are structured as link farms. The presence of these external links suggests an intent to redirect users to potentially malicious sites for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.6906

Heuristics 4

  • 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
  • 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=self+righteous+hypocrites
    • http://tral-kerch.ru/userfiles/file/87475180052.pdf
    • http://annabarons.lv/files/files/10796235652.pdf
    • https://www.gs-gleichmann.de/wp-content/plugins/formcraft/file-upload/server/content/files/1612ee1ce47832---gepitugijesafopured.pdf
    • https://tommytest.dish1314.com/data/html_editor/files/2874038773.pdf
    • https://fibra-optica.ro/ckfinder/userfiles/files/dozagejiwefujisoxonolag.pdf
    • http://emailreceptionist.net/userfiles/file/muwolimixugulu.pdf
    • https://demetraproject.eu/ckfinder/userfiles/files/43480593984.pdf
    • https://alariel.be/userfiles/file/danevuraluwugo.pdf
    • http://denki-shonan.com/uploadsfile/30587051418.pdf
    • http://jj-metals.com/userfiles/file/2021091020362873499.pdf
    • http://ventilatoryzlin.cz/images/file/rijukegigubizirubilet.pdf
    • http://mjengo.org/FCKeditor/editor/filemanager/connectors/php/connector.php?Command=FileUpload&Type=File&CurrentFolder=%2Ffile/gerezoxegepajosumegovax.pdf
    • http://portakalweb.net/home/portakal/public_html/ckfinder/userfiles/files/769605790.pdf
    • https://ssmavidiyar.com/public/content-images/files/83308653476.pdf
    • https://airshow-bg.com/file/linurowejolutovijiginofo.pdf
    • https://resulgame.com/calisma2/files/uploads/86118703244.pdf
    • http://ildong.org/sa_upload/userfiles/file/20210925044529.pdf
    • http://hatdesechia.com/storage/ckfinder/files/sakizezebubelimuzawe.pdf
    • http://tandartsindex.nl/images/uploads/bevefirufif.pdf
    • http://tuanayapim.com/rsm/files/gaxalaf.pdf
    • https://www.tzounakos-insurance.gr/ckfinder/userfiles/files/49599044736.pdf
    • https://hps-gruppe.com/wp-content/plugins/super-forms/uploads/php/files/5rt6avo2ed87hokvqilppdjcb9/65253684312.pdf
    • http://buren-kompanie.de/userfiles/files/fovedakog.pdf
    • http://fuhua.tumujike.com/assets/upload/files/202109090142436270.pdf
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 1

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000dac6.bin
9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
pdf-font-stream PDF embedded font (sfnt) at offset 0xDAC6 16792 bytes