Malicious PDF — malware analysis report

Static analysis result for SHA-256 46f0f149902cf48a…

MALICIOUS

PDF

86.3 KB Created: 2021-07-30 12:48:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2021-10-24
MD5: 2fa614a8e6ca132339abbe79e520fc99 SHA-1: d6a738dc242eb85f28d7862f1e608b877b1105eb SHA-256: 46f0f149902cf48aa29dd4f783cc03fcd2311dc5ae6e4975d2b957e3cac356d5
156 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics as malicious, including a critical ClamAV detection and a high ML classifier score. It contains numerous links pointing to compromised websites and disposable hosting, suggesting an attempt to redirect users to malicious content. The PDF structure itself appears to be a link farm designed to obscure the ultimate destination, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9984

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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.
  • 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://pluckywize.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609860f050792---duxerut.pdf In PDF document text
    • https://ocvirapuato.com.mx/wp-content/plugins/super-forms/uploads/php/files/c53d547489a61589aa859b2ff4f044c4/tasazexifumijowosenobij.pdfIn PDF document text
    • http://bhavalaya.org/ckfinder/userfiles/files/tasefima.pdfIn PDF document text
    • https://www.cfo-search.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c30d0509367---41867497588.pdfIn PDF document text
    • https://kvartira-zalog.ru/wp-content/plugins/super-forms/uploads/php/files/80231da6687e8962e683e4aac018f5c4/28623796085.pdfIn PDF document text
    • https://www.alphaveneers.com/wp-content/plugins/super-forms/uploads/php/files/096f4cf6e102b05610ddcb1446eab9dd/xonovopazogibup.pdfIn PDF document text
    • https://coopinproject.eu/ckfinder/userfiles/files/votibuneluzem.pdfIn PDF document text
    • http://www.fonfe.com/uploads/files/serozuw.pdfIn PDF document text
    • http://www.cuerpomenteyespiritu.es/wp-content/plugins/formcraft/file-upload/server/content/files/16079403ac963a---rufubagurulukukasefufipo.pdfIn PDF document text
    • https://socialchangefactory.org/wp-content/plugins/super-forms/uploads/php/files/046865f411427959fecc20ddcc4f2b4f/71061038439.pdfIn PDF document text
    • https://spencershaulageltd.co.uk/wp-content/plugins/super-forms/uploads/php/files/960d9cecad1eeaf577af1c56a2b24c2d/pitiwekutigepug.pdfIn PDF document text
    • https://www.budgetskemaet.dk/wp-content/plugins/formcraft/file-upload/server/content/files/16079aa834a0ba---80701897760.pdfIn PDF document text
    • http://tokyoto.pl/UserFiles/file/xofurulivuziwitadegefifo.pdfIn PDF document text
    • http://project-st.ru/userfiles/file/36324001477.pdfIn PDF document text
    • http://guides2alpes.org/uploads/file/ribibobutojitar.pdfIn PDF document text
    • https://www.idromeccanicasrl.com/idromeccanicasrl.com/wp-content/plugins/super-forms/uploads/php/files/674474e9f0ebcbe0d0ba248d6d58b0ce/nalobupagomoj.pdfIn PDF document text
    • http://www.jamesbgriffinlaw.com/wp-content/plugins/formcraft/file-upload/server/content/files/160a71febcb488---15427057635.pdfIn PDF document text
    • https://jkmart.net/FCKFiles/File/35031997.pdfIn PDF document text
    • http://www.1000ena.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cf9a12d8cd1---47726231623.pdfIn PDF document text
    • https://bmw-zona.ru/uploads/file/90340415856.pdfIn PDF document text
    • http://ksnjl.com/userfiles/files/nunanomopuxosifuraxoz.pdfIn PDF document text
    • http://entone.es/wp-content/plugins/super-forms/uploads/php/files/40f2459df0b7885023174d78ffcbad3d/zebubeberozoxofodekiwuf.pdfIn PDF document text
    • https://expungemyrecordnj.com/wp-content/plugins/formcraft/file-upload/server/content/files/1607e001b04f26---40069407317.pdfIn PDF document text
    • https://feedproxy.google.com/~r/1eyvgo/aqOO/~3/BvfzZFkJO3s/uplcv?utm_term=buchanan+county+iowa+policePDF 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_off0000efae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEFAE 16528 bytes
SHA-256: dfd13a47ba6bd65007f717633550cf2d10e404500b396a5e0d5a80432d4a01df
font_01_sfnt_off00011aba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11ABA 10556 bytes
SHA-256: ed86e38768dc78fb00b822fe633f7406de5c57da05cb1e1d718ac13f0fe292fc
font_02_sfnt_off000132e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132E2 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1

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