Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecd38970d674651f…

MALICIOUS

PDF

84.0 KB Created: 2021-09-12 18:51:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-24
MD5: 857685c94feb8db3f17884adb6e02845 SHA-1: 3b7bd3e0ac1405106d9e09c7eca3f5ee8c431977 SHA-256: ecd38970d674651f311197b1c65fa709596ac0b9a81578bef8b3086dfb8ea393
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and numerous external URIs, many of which are structured as link farms. The ML classifier and ClamAV detection strongly indicate malicious intent. The presence of JavaScript suggests an attempt to execute code, likely to redirect the user to malicious sites or download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9974

Heuristics 6

  • 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.
  • 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 http://eiak.org/upload/editor/files/weguwizimorokapijuxuxu.pdf In PDF document text
    • http://kameleonhastanc.hu/files/file/3294878090.pdfIn PDF document text
    • https://www.alapan.org/fckimages/file/nawexotufimaji.pdfIn PDF document text
    • http://travelcenterpuntos.com/campannas/file/relemosekapidafiminavaze.pdfIn PDF document text
    • http://kapsalonvogue.nl/files/file/matet.pdfIn PDF document text
    • http://tg-focus.ru/userfiles/files/texanevafadupotoxax.pdfIn PDF document text
    • https://dailyhondaotomientay.com/upload/files/nudasumimuxutiziwewexenom.pdfIn PDF document text
    • https://adamant54.ru/userfiles/files/wizeva.pdfIn PDF document text
    • http://mundialimportweb.com/userfiles/file/41362546543.pdfIn PDF document text
    • https://transdeliveris.lt/userfiles/file/63972963212.pdfIn PDF document text
    • http://eurolocal.info/sites/default/files/images/file/57893612710.pdfIn PDF document text
    • http://www.portaldasfreguesias.com/portugal/vianadocastelo/vianadocastelo/geraz_do_lima_sta_maria/ckeditor/ckfinder/file/mepawudefuneto.pdfIn PDF document text
    • http://shopcloud.cloud/ckfinder/userfiles/files/5814523297.pdfIn PDF document text
    • http://bangladeshceramicsociety.com/uploads/editor/files/sunuvu.pdfIn PDF document text
    • http://compie.ru/wp-content/plugins/formcraft/file-upload/server/content/files/1613cab00cb7ec---xaxosowatojitajalu.pdfIn PDF document text
    • http://syarmarka.ru/userfiles/files/maxuxotegabalaxuvejov.pdfIn PDF document text
    • https://www.tulsarad.com/my_content/js/ckfinder/userfiles/files/75933218586.pdfIn PDF document text
    • http://buyyoutubesubscribers.com/ci/userfiles/files/68185586849.pdfIn PDF document text
    • http://enjoy.sk/editor_uploads/system/files/nerababitesebegu.pdfIn PDF document text
    • https://angelsolutions.ro/ckeditor/ckfinder/userfiles/files/rexuro.pdfIn PDF document text
    • http://pngroup.pl/ckfinder/userfiles/files/zivavaxi.pdfIn PDF document text
    • http://cerrutistudio.eu/userfiles/files/82426013788.pdfIn PDF document text
    • https://www.energetisch-therapeut-estie.nl/wp-content/plugins/formcraft/file-upload/server/content/files/1613b6c5b52546---22747499020.pdfIn PDF document text
    • https://aadharshilaschool.org/userfiles/file/74652261853.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/fzgW7-mxBc0/uplcv?utm_term=random+credit+card+number+cvv+generatorPDF 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_off0000e2c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE2C3 17868 bytes
SHA-256: 7fbd63d5709033d62c309499b8f5b4fb9bab9f608d98d608ba4c1535dd960712
font_01_sfnt_off00011156.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11156 10848 bytes
SHA-256: 6e2c0d6bef59a8a2a8b2fcd1bec75b148009e2d53118927a07e10b20659a246e
font_02_sfnt_off00012a2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x12A2E 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1