Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ecabc7159c97d08…

MALICIOUS

PDF

79.9 KB Created: 2021-09-09 06:54:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-02
MD5: ac8cb4809f455d76568b54d573af09e7 SHA-1: c4598630e417fa1f0649897a3bebe47db702134d SHA-256: 6ecabc7159c97d088514ab47ac1962d04c6c3dcad886c5212c903d86764512aa
164 Risk Score

Malware Insights

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

The PDF contains embedded JavaScript and a significant number of external links, many hosted on compromised or disposable domains, indicating a link farm designed to redirect users. The presence of a lure related to 'minecraft pocket edition' suggests a social engineering tactic to entice clicks. ClamAV detection and ML classification confirm the malicious nature, likely involving exploitation of PDF vulnerabilities to execute the embedded JavaScript.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9933

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
  • PDF link farm points to compromised-WordPress upload storage medium PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM
    PDF contains multiple clickable links, across many distinct hosts, whose targets are random-slug files parked in the upload directories of vulnerable WordPress form plugins (FormCraft, Super Forms). This is the hallmark of the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains hosted on compromised sites. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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://drafthe.ru/uplcv?utm_term=minecraft+pocket+edition+play+free PDF link annotation
    • http://walosports.cl/userfiles/file/kiwabit.pdfIn PDF document text
    • http://ducthanhtam.com/uploads/userfiles/file/satuw.pdfIn PDF document text
    • http://fullx.net/files/gozolarezexuxujobi.pdfIn PDF document text
    • https://tourgardan.com/basefile/tourgardancom/files/fozuxesiriranasaxuru.pdfIn PDF document text
    • https://noursportevents.com/wheelmarine/userfiles/file/fexunariw.pdfIn PDF document text
    • http://fratellilongoni.com/userfiles/files/40846158163.pdfIn PDF document text
    • https://valkexclusief.reviewz.eu/app/webroot/files/userfiles/files/33323814323.pdfIn PDF document text
    • https://www.ikedatosou.com/wp-content/plugins/formcraft/file-upload/server/content/files/1612e9bebc57cd---lewitedudibufakinowaku.pdfIn PDF document text
    • https://gmt-tw.com/app/webroot/userfiles/files/nawudunavogazofavekowew.pdfIn PDF document text
    • https://www.jnvhardoi.org/ckfinder/userfiles/files/24335950554.pdfIn PDF document text
    • https://nhaban24h.com.vn/wp-content/plugins/super-forms/uploads/php/files/un2jhufg0kq1h8ub3o2rof7l5f/4518390853.pdfIn PDF document text
    • http://1day2night.com/UserFiles/file/roteredewoxebimolurapodab.pdfIn PDF document text
    • https://aordonez.com/images/contenidos/files/34035027598.pdfIn PDF document text
    • http://agro-pasz.pl/ckfinder/userfiles/files/wimobanukobunaru.pdfIn PDF document text
    • http://aksaaydinlatma.com/img/editor/image/file/44633531813.pdfIn PDF document text
    • http://www.tobywells.org/media/fckdir/file/muwijixenenifebewovebazu.pdfIn PDF document text
    • http://ilturismoinitalia.it/userfiles/files/91301478132.pdfIn PDF document text
    • http://uran-berlin.com/userfiles/file/pizenunomogek.pdfIn PDF document text
    • http://80tner.netsociality.com/upload/files/90585345531.pdfIn PDF document text
    • http://recko.ru/ckfinder/userfiles/files/7681259941.pdfIn PDF document text
    • http://i-akparat.kz/ckfinder/userfiles/files/16812731107.pdfIn PDF document text
    • https://kimcert.org/E/file/66171257096.pdfIn PDF document text
    • https://llbyggodesign.se/UserFiles/files/90927645775.pdfIn PDF document text
    • https://simovi.mx/wp-content/plugins/formcraft/file-upload/server/content/files/161388ae6cd442---tufomosixapokigifukixagil.pdfIn PDF document text
    • 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b9c7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB9C7 17272 bytes
SHA-256: 0b26e2b1dc1e2e63b823e913c9067d7a6e0ee737069fc8e0d1108f24df40a3f8
font_01_sfnt_off0000d35e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD35E 17696 bytes
SHA-256: 979326480c454bbed142f295ef2dfc9cc21f805ec2fca11bf85b094f086e2876
font_02_sfnt_off00010109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10109 10644 bytes
SHA-256: 4a4dfad333c90e8d2af256319134d9d07c84b073c07b437285a730f4cacfeadd
font_03_sfnt_off00011988.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11988 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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