Malicious PDF — malware analysis report

Static analysis result for SHA-256 0208451beb6e1774…

MALICIOUS

PDF

80.5 KB Created: 2021-09-14 22:55:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-14
MD5: 9b0f12c8a08c99572de505950ed70fc4 SHA-1: dab899649ea2e74adc9e25e448865e5e6dfafb42 SHA-256: 0208451beb6e1774ab0dbf4906f3cc8f4e779fc2594306bece9455b779ca43f4
204 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and multiple external links, some pointing to compromised WordPress sites. The 'SE_CLIPBOARD_COMMAND_LURE' heuristic indicates the document likely instructs the user to copy and paste commands into a shell, a common technique for downloading and executing further malicious content. The ML classifier and ClamAV detection strongly suggest malicious intent, likely related to phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9960

Heuristics 8

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Clipboard command execution lure high SE_CLIPBOARD_COMMAND_LURE
    Document tells the user to copy or paste clipboard content into Run, PowerShell, cmd, or another shell-like execution context
  • 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://mariapolis.net/ckfinder/userfiles/files/sobubepugomiwataz.pdf In PDF document text
    • http://gsoam.ge/wp-content/plugins/formcraft/file-upload/server/content/files/1613e94b2ca033---taxugoxazejevasoxuvuwuw.pdfIn PDF document text
    • http://volker-issmer.de/userfiles/file/zitawetog.pdfIn PDF document text
    • http://fujieshubao.com/zk/UploadFile/file/2021090511444573499.pdfIn PDF document text
    • http://remont-etalon.ru/upload/files/2177556178.pdfIn PDF document text
    • http://maternites-catholiques.org/ressource/site-image/files/8389556151.pdfIn PDF document text
    • http://sartoriaventurini.com/userfiles/files/32875355683.pdfIn PDF document text
    • http://airconbank.com/upload/fckeditor/file/wuloni.pdfIn PDF document text
    • https://sipare.com.ar/wp-content/plugins/super-forms/uploads/php/files/i88m3s9duripe2351m66ghphjk/sujipazenifilejiziketuwox.pdfIn PDF document text
    • http://the-bom.kr/upfile/files/24058862603.pdfIn PDF document text
    • https://accuratesearch.com/userfiles/file/jijaxoji.pdfIn PDF document text
    • http://www.hkwebdesign.com.hk/wp-content/plugins/formcraft/file-upload/server/content/files/1613f28a6f3bc0---65709584136.pdfIn PDF document text
    • https://dukeofmarshall.com/ckfinder/userfiles/files/46604181788.pdfIn PDF document text
    • https://www.natursany.com/ckfinder/userfiles/files/lepovigiwejubisovoxexura.pdfIn PDF document text
    • http://lifeline-sports.com/files/file/mafamaguxigaze.pdfIn PDF document text
    • http://pzhjintai.com/upload/files/vuzibisaxanuwusaxod.pdfIn PDF document text
    • https://israelonthehouse.com/wp-content/plugins/formcraft/file-upload/server/content/files/1614036bc93be2---tezazeto.pdfIn PDF document text
    • https://www.advids.io/wp-content/plugins/formcraft/file-upload/server/content/files/161365fe19a7c1---lunopuvadejodeb.pdfIn PDF document text
    • https://phoenixknights.co.uk/wp-content/plugins/super-forms/uploads/php/files/5d56a9bc16cc685d71cad657f2b734d2/dabagodu.pdfIn PDF document text
    • http://motoren-adachi.com/js/upload/files/subanefoxeluwedarogiz.pdfIn PDF document text
    • http://www.moteco.ro/wp-content/plugins/formcraft/file-upload/server/content/files/1613dc564e8ab5---mavugisujojifez.pdfIn PDF document text
    • http://sriagasthiyarastro.com/FCKeditor/userfiles/file/nagadogolulojirilero.pdfIn PDF document text
    • https://vieclamlaocai.vn/webroot/img/files/sovezopuralodufozobidex.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/3CAf4wW3hvY/uplcv?utm_term=windows+limbo+pc+emulatorPDF 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_off0000d54d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD54D 10992 bytes
SHA-256: e0fdd289e6d9bb70d6ea08e0f485ce4d839235f6c69c07fbfc249663903117bb
font_01_sfnt_off0000ee9c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE9C 17732 bytes
SHA-256: 9c61198e2bbb7f9fe73051c69f1299b0e5cad7148752b43265b6883bb928432d
font_02_sfnt_off00011cc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11CC4 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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