Malicious PDF — malware analysis report

Static analysis result for SHA-256 94a3f96f7a0693c4…

MALICIOUS

PDF

82.4 KB Created: 2021-09-23 15:07:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-31
MD5: 341cd7205b30a74a4909960a7836b5b8 SHA-1: ace295479c496e121cca2d85bc7fa7632acc54d6 SHA-256: 94a3f96f7a0693c43787972d92d75bea0234c541bbad46f8981d2a902e76f1c6
186 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a phishing lure, including a link farm and instructions for a password-protected archive, suggesting it's designed to trick users into downloading a malicious payload. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URLs point towards a phishing campaign that likely uses embedded JavaScript for obfuscation or redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9955

Heuristics 7

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.
  • QR-code redirect lure medium SE_QR_LURE
    Document instructs the user to scan a QR code with a phone — consistent with QR phishing, but also common in legitimate documents
  • 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://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://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_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
font_02_sfnt_off00010ae6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AE6 18868 bytes
SHA-256: 88a3ce18a6f60bf31fb1dda418bff1b6b2839854024534a65128495c4aaedc37