Malicious PDF — malware analysis report

Static analysis result for SHA-256 693d3fe136481375…

MALICIOUS

PDF

84.3 KB Created: 2021-09-15 14:35:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: b385eb1f920ced3c1595c7d38c5a8029 SHA-1: 4331343a336f910a70360d62290bc9d63d19cef9 SHA-256: 693d3fe1364813754b74d2ae82ea26ca185c9ad2318a3e3bfbc9857588e5d4c0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF file contains embedded JavaScript and numerous external URIs, many of which point to disposable hosting or IP addresses, indicating a likely phishing or malware distribution attempt. The ML classifier and ClamAV detection strongly suggest malicious intent. The embedded JavaScript is likely used to facilitate the redirection to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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.
  • Embedded JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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://kochitaxirental.com/ckfinder/userfiles/files/febelufegagofatovinuberub.pdf In PDF document text
    • https://liantoong.com/archive/upload/files/39331672341.pdfIn PDF document text
    • http://tetobox-budapest.hu/uploads/files/10159949717.pdfIn PDF document text
    • http://davcpundri.com/css/file/66941736820.pdfIn PDF document text
    • http://orem.mn/uploads/files/bapuf.pdfIn PDF document text
    • https://iieng.org/editor/ckfinder/userfiles/files/19425258752.pdfIn PDF document text
    • http://yuli-china.ru/d/files/jirunaludifigapirivipigo.pdfIn PDF document text
    • http://www.creativitaecomunicazione.it/js/lib/ckfinder/userfiles/files/82679989539.pdfIn PDF document text
    • http://saconsultancy.com/userfiles/file/76581189735.pdfIn PDF document text
    • http://ana-jsc.com/upload/files/88042254579.pdfIn PDF document text
    • http://medob.org/SITE/files/editor/file/gitifobimix.pdfIn PDF document text
    • http://vektor-bezpeki.com/userfiles/files/japodetapi.pdfIn PDF document text
    • https://vinaconexmec.vn/uploads/news_file/9468889014.pdfIn PDF document text
    • http://79.170.40.182/boothtastic.com/wp-content/plugins/formcraft/file-upload/server/content/files/16141940d05b6a---nawifofutojesez.pdfPDF link annotation
    • http://www.movingintofreedom.com/wp-content/plugins/formcraft/file-upload/server/content/files/161414057678ac---99894919539.pdfIn PDF document text
    • https://bbu.vn/Images_upload/files/maxodebitexakelosewubat.pdfIn PDF document text
    • https://grafconsulting.pl/Upload/file/tavejesipokatefexosefuj.pdfIn PDF document text
    • https://wsbe17hongkong.hk/_bin/ckfinder/userfiles/files/56579759228.pdfIn PDF document text
    • http://bapassamarinda.id/assets/ckfinder/core/connector/php/uploads/files/57262867865.pdfIn PDF document text
    • http://kondicionery-shodnya.ru/upload_picture/file/61889045047.pdfIn PDF document text
    • http://pscemetery.com/userfiles/file/rozeruwalulupuxugeso.pdfIn PDF document text
    • http://korvet-sp.ru/userfiles/file/53398600650.pdfIn PDF document text
    • http://e68momo.com/shopadmin/upload/files/44220816270.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/BkSY9tpko7c/uplcv?utm_term=watch+friends+season+1+episode+2PDF 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_off0000e25a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE25A 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000fa6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA6C 18504 bytes
SHA-256: b8545571cb39d27b43c8d684c2e1c919ddceca53d1879f4e6093bfd30e12cd3c
font_02_sfnt_off00012a34.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A34 10836 bytes
SHA-256: 740a8f8c0f584881c9e89b932cd9501859240f163103842237e24def2a2f3fd6