Malicious PDF — malware analysis report

Static analysis result for SHA-256 12d62d4625bbe3b9…

MALICIOUS

PDF

76.2 KB Created: 2021-09-23 15:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-27
MD5: 96357201567de7d45a094843c431ffe6 SHA-1: ab4dd4eb6024e11cddaa1499fb329aa3ed76f3d2 SHA-256: 12d62d4625bbe3b9c65a4a81da776c6dd9241fd3ff8dc590f3ac603c4ffdc985
94 Risk Score

Malware Insights

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

The file was detected as a phishing trojan by ClamAV. Static analysis revealed it functions as a link farm, directing users to numerous unknown URLs, many of which are hosted on potentially disposable domains. The PDF's structure and embedded links suggest an attempt to distribute malicious content or phish for credentials.

Machine Learning

  • Nyx PDF Classifier suspicious score 0.4752

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 https://dmitrovka-zn.ru/admin/ckfinder/userfiles/files/juwikewasixunapofiputom.pdf In PDF document text
    • http://sporteambiente.it/ckfinder/userfiles/files/30740515299.pdfIn PDF document text
    • http://aotwcasino.com/ckfinder/userfiles/files/rowenol.pdfIn PDF document text
    • http://windcampus.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613e3fe4c0cb6---78733875949.pdfIn PDF document text
    • http://fatfailogistics.com/fckeditor/files/file/78747204308.pdfIn PDF document text
    • http://taeguektour.com/FileData/ckfinder/files/20210910_7426B353085A0CCA.pdfIn PDF document text
    • http://around-sicily.net/userfiles/file/60399854767.pdfIn PDF document text
    • http://mitsubishilongbien.vn/images/ckeditor/files/tizatufokovititaka.pdfIn PDF document text
    • http://braciszewska-klimek.pl/fck_files/file/tubopesasuxitexor.pdfIn PDF document text
    • https://qfse.co/images/uploaded_files/ckfinder/files/1632057303_a239c3937e.pdfIn PDF document text
    • https://ijacr.net/assets_admin/ckfinder/core/connector/php/uploads/files/wezijalifemigotepave.pdfIn PDF document text
    • http://seatraderhk.com/userfiles/fijatufoxegutez.pdfIn PDF document text
    • http://doremimarlikinsaat.com/userfiles/file/4137607035.pdfIn PDF document text
    • http://ebslang.net/_UploadFile/Images/file/54738522496.pdfIn PDF document text
    • http://unite-chem.cn/upload/files/linijumerijixo.pdfIn PDF document text
    • https://betenenergy.com/sites/default/files/file/newikojevuvusil.pdfIn PDF document text
    • https://mediabandit.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614429c708b26---wodiradusurapasa.pdfIn PDF document text
    • http://marinapogon.pl/upload/file/tagimalukusudatiwokuxovif.pdfIn PDF document text
    • https://bnbtravels.com/ckfinder/userfiles/files/pepoxixalen.pdfIn PDF document text
    • http://apmnir.ro/fckfiles/file/23663561569.pdfIn PDF document text
    • http://pizzeria-millemiglia.de/app/webroot/img/editor/file/2296747512.pdfIn PDF document text
    • http://www.thunderesp.com/ckfinder/ckfinder.htmlfiles/dusitusapavuro.pdfIn PDF document text
    • https://investmentskillsgroup.com/images/userfiles/file/fetozaditabesive.pdfIn PDF document text
    • http://spy-military-labs.com/userfiles/file/28831540817.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/3CAf4wW3hvY/uplcv?utm_term=transf%C3%A9rer+donn%C3%A9es+android+vers+macPDF 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_off0000daa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDAA1 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000f2b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2B8 10676 bytes
SHA-256: 7534aff9eebc4e6972bfe6b85f979fbbb45ff1b04949d75d6cd06eacebe646c9