Malicious PDF — malware analysis report

Static analysis result for SHA-256 cd06b206a93549f0…

MALICIOUS

PDF

78.9 KB Created: 2021-09-20 02:54:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-12
MD5: dbe6aee627723c0ff0c5628c84b9b97f SHA-1: d41de17c6fe25dc1a7ff1288f334ac7e4a7f57e1 SHA-256: cd06b206a93549f08a3fb1a35f17e881edea96036895e97326fd15cddd4563b6
164 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript and multiple external URIs, indicating it's designed to redirect users to potentially malicious websites. Heuristics like 'PDF_SEO_DISPOSABLE_LINK_FARM' and 'PDF_COMPROMISED_CMS_UPLOAD_LINK_FARM' suggest a phishing or malware distribution scheme. The ML classifier and ClamAV detection strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9975

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://ketchas.ru/uplcv?utm_term=project+drift+mod+apk PDF link annotation
    • http://pokewaveanaheim.com/uploads/files/67678469966.pdfIn PDF document text
    • https://atlas-consulting.ro/fckeditor/fisiere/file/midolakerososazizebibuzi.pdfIn PDF document text
    • http://panel2conso.com/userfiles/file/wifuwadupasenelo.pdfIn PDF document text
    • http://niktid.ru/userfiles/file/26873292573.pdfIn PDF document text
    • http://www.infranetltd.com/wp-content/plugins/formcraft/file-upload/server/content/files/16147aef760647---juxipoxopanuwamakol.pdfIn PDF document text
    • http://mijn-nederland.nl/userfiles/file/sogiwuzisawegamutarod.pdfIn PDF document text
    • http://thestarbusan.com/FileData/ckfinder/files/20210908_BAB6A64126C95424.pdfIn PDF document text
    • http://jinruily.com/UploadFile/file/20210905195150738.pdfIn PDF document text
    • http://www.aaar.cat/assets/js/ckfinder/userfiles/files/83504635811.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/jodupupofaluxamolowiri.pdfIn PDF document text
    • https://xn--z4qq44i.xn--kpry57d/upload/actfiles/kunajisoses.pdfIn PDF document text
    • https://alixdemassy.fr/userfiles/file/gazutuxemoketale.pdfIn PDF document text
    • http://kosmonautika.ee/ckfinder/userfiles/files/85353366676.pdfIn PDF document text
    • https://esteticarcare.com/wp-content/plugins/super-forms/uploads/php/files/303b4febd0d036dfa04bffe092c3efd0/56333996066.pdfIn PDF document text
    • http://atomleasing.ru/media/File/gofobojomas.pdfIn PDF document text
    • https://www.opdrrustukalac.com/wp-content/plugins/formcraft/file-upload/server/content/files/1613ecc2ca2bb4---14218686983.pdfIn PDF document text
    • https://justforjetscatering.com/userfiles/image/files/53033900822.pdfIn PDF document text
    • https://burstallconrad.com/editor_files/file/16364781197.pdfIn PDF document text
    • http://china-spec.ru/userfiles/file/13222105012.pdfIn PDF document text
    • http://www.omt.ntou.edu.tw/ckfinder/userfiles/files/vuxakixalizemepemonan.pdfIn PDF document text
    • http://ladyvenus.it/userfiles/files/jusokorosoxug.pdfIn PDF document text
    • http://diskacme.dk/images/upload/file/puwedimixekopow.pdfIn PDF document text
    • http://nfrostov.ru/upload/files/51902194590.pdfIn PDF document text
    • https://doucetplasticsurgery.com/ckfinder/userfiles/files/13019720196.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d079.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD079 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000e890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE890 10688 bytes
SHA-256: 968ea429557000ebc1f60ea77ef6cd7732a9ce0e2c864a3553ff265b7d2ba14e
font_02_sfnt_off00010111.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10111 17224 bytes
SHA-256: e3eb97a9e25248a9fdac5851b5b22d05831d63e3103ca6cd351b6ac34ebdfbce

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