Malicious PDF — malware analysis report

Static analysis result for SHA-256 3b0becdd2d5260ff…

MALICIOUS

PDF

70.9 KB Created: 2021-10-03 09:12:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-11-25
MD5: f1e5028791b49466b56f621bcb1c4ea8 SHA-1: 6b1c6376e5c41bf2bc893d14c3e00ee1115af2f0 SHA-256: 3b0becdd2d5260ff70ea01fae00078d916778a2ca3f6ac92169b93d6413bcc69
164 Risk Score

Malware Insights

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

This PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and ML classifiers indicate a high probability of maliciousness. It contains embedded JavaScript and numerous links to external sites, some hosted on compromised CMS platforms. These elements suggest the document is designed to redirect users to phishing pages or download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9956

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://coretry.ru/uplcv?utm_term=bollywood+dialogues+quiz+with+answers PDF link annotation
    • https://camphacement.vn/upload/files/47839907569.pdfIn PDF document text
    • https://primeodontorj.com/wp-content/plugins/super-forms/uploads/php/files/2e1b6ef3d96357698d60af28fccc26ca/gewidufagurejuw.pdfIn PDF document text
    • http://sh-songshi.com/admin/upimg/file///2441763739.pdfIn PDF document text
    • http://mastera-mix.ru/ckfinder/userfiles/files/95297193738.pdfIn PDF document text
    • http://gatewayhotelbangkok.com/upfile_hotel/files/revadekapitezobonugozamuj.pdfIn PDF document text
    • https://musluogluotomotiv.com/upload/ckfinder/files/wirud.pdfIn PDF document text
    • http://gazduire-domeniu.com/UserFiles/file/vanawomuwilag.pdfIn PDF document text
    • http://bratislava.topenglish.sk/app/webroot/gallery/files/kanagovefofabuga.pdfIn PDF document text
    • http://poddertradingandindustries.com/userfiles/file/37524144933.pdfIn PDF document text
    • https://youkuvpn.com/upload/files/wakufidumafo.pdfIn PDF document text
    • https://popa.com.br/wp-content/plugins/super-forms/uploads/php/files/3c0f867df0f60c7bbfb5d3842f9dcd3b/vetawob.pdfIn PDF document text
    • http://zhatuogz.com/uploadfile/file/gudosadove.pdfIn PDF document text
    • http://bubblesoflove.net/wp-content/plugins/formcraft/file-upload/server/content/files/1614122cec4d53---nakijedekelusulidewanoja.pdfIn PDF document text
    • http://k12kos.com/ckfinder/userfiles/files/33787985190.pdfIn PDF document text
    • http://3dtechgroup.com/uploads/image/files/22268527443.pdfIn PDF document text
    • http://newgoodluckcrane.com/admin/uploadfiles/file/27088794901.pdfIn PDF document text
    • http://hemeringen.de/ckeditor_ablage/userfiles/files/33310347448.pdfIn PDF document text
    • http://coquicart.com/ckeditor/ckfinder/core/connector/php/uploads/files/kofejuduzetanixeruj.pdfIn PDF document text
    • http://krishikhabar.net/assets/ckfinder/core/connector/php/uploads/files/25668476954.pdfIn PDF document text
    • http://viral-list-monster.com/ckfinder/userfiles/publics/files/pifetesoj.pdfIn PDF document text
    • https://10kshot.com/customerinterview/ckfinder/userfiles/files/89850851083.pdfIn PDF document text
    • http://friulanapanini.com/images/file/11592628306.pdfIn PDF document text
    • http://stsmcc.org/www/js/ckfinder/userfiles/files/jibiwewimipitokijapufiful.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_off0000b08b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB08B 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0000c89d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC89D 17276 bytes
SHA-256: 43feaafdc9f628e4b684735989540f6c60fe20d248444bcadc46041534d2738f
font_02_sfnt_off0000f4b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF4B5 11088 bytes
SHA-256: 3b5311e0fc8bd47654b7c4c7d7cc3bbd128aa64302fdb40e74bbbbc78cd19a5f

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