Malicious PDF — malware analysis report

Static analysis result for SHA-256 f3d2a034bc98806c…

MALICIOUS

PDF

86.5 KB Created: 2021-07-01 16:19:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: 7fb7f308504cfed37d85998a126450f4 SHA-1: 95d915cbe14d254557b09685b480fc949c7f68fd SHA-256: f3d2a034bc98806c0c21595f672d6ec98ad01bf7cfaa636a3aabba84fd164c0a
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 an ML classifier. It functions as a link farm, with numerous embedded URLs pointing to compromised CMS upload directories. These links likely serve as a lure to download further malicious content or phish for user credentials.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9942

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://ecomassage.pt/wp-content/plugins/super-forms/uploads/php/files/7j71c9v4qmcbru9hpe17r4b9ca/rufebuze.pdf In PDF document text
    • http://www.gainerwindows.ca/wp-content/plugins/super-forms/uploads/php/files/kn5c37a1e002a7v5ec4tuu37g4/67585599355.pdfIn PDF document text
    • https://www.deuba.info/wp-content/plugins/super-forms/uploads/php/files/qig0ns2g0at6cakgv8iimp9it4/wezisasulepimitutijapador.pdfIn PDF document text
    • https://inlandautorepairmurrietaca.com/wp-content/plugins/super-forms/uploads/php/files/7fd913ab5636aa6b1f903a7795f75e00/perabokuk.pdfIn PDF document text
    • https://provisionsinternational.com/wp-content/plugins/formcraft/file-upload/server/content/files/16094869010f95---90093765928.pdfIn PDF document text
    • https://palcev.ru/userfiles/file/leburegu.pdfIn PDF document text
    • http://www.huntsvillepr.com/files/files/pizuxemetaxen.pdfIn PDF document text
    • http://adabaskimerkezi.com/upload/file/29668850730.pdfIn PDF document text
    • https://ahi.com.ua/wp-content/plugins/super-forms/uploads/php/files/cf4757199e2e8ee1681bd5fe48fb18bb/tojurizivefawibutumubax.pdfIn PDF document text
    • http://www.sunargrup.com.tr/wp-content/plugins/super-forms/uploads/php/files/o39kol2mspp2vitcijn7bhg0u6/98072680667.pdfIn PDF document text
    • http://www.optionassurance.ca/wp-content/plugins/formcraft/file-upload/server/content/files/1606f8f419621d---tugagakarazimes.pdfIn PDF document text
    • https://best-turbos.com/wp-content/plugins/super-forms/uploads/php/files/8a4006637fd25acecff3cfee3e6f278e/86290536139.pdfIn PDF document text
    • https://www.bouldersudbury.org/wp-content/plugins/formcraft/file-upload/server/content/files/160742c52837c8---30976147619.pdfIn PDF document text
    • http://obasekiestates.com/UserFiles/file/ragatig.pdfIn PDF document text
    • http://eros-arena-reutlingen.de/eros/userfiles/file/732005220.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/d36ghi0pbtlu4t91nvecdaeqo1/5887509306.pdfIn PDF document text
    • http://paymentsbusiness.ca/wp-content/plugins/formcraft/file-upload/server/content/files/160712208c784b---muvem.pdfIn PDF document text
    • https://ancoraeducacion.com/images/zajik.pdfIn PDF document text
    • http://asja-doll.ru/userfiles/file/vuvezajabasatinawugufo.pdfIn PDF document text
    • https://www.chesapeake-lighting.com/wp-content/plugins/super-forms/uploads/php/files/245c67b998558c734e60b65cdbd048d4/55996777728.pdfIn PDF document text
    • http://www.hkqi.com/wp-content/plugins/formcraft/file-upload/server/content/files/160c119d11455d---26227203231.pdfIn PDF document text
    • https://zanhotel.ro/beficientconsultingFiles/file/xozetarupekujituw.pdfIn PDF document text
    • https://atlanthealth.com/wp-content/plugins/super-forms/uploads/php/files/c6f2fa30be2d7f87730e59fb43ee3b51/fefudebexaxirigas.pdfIn PDF document text
    • http://biemmecommerciale.eu/userfiles/files/83781251137.pdfIn PDF document text
    • https://holzhaus-suedtirol.it/wp-content/plugins/formcraft/file-upload/server/content/files/16078a0fdb01df---52901206439.pdfIn PDF document text
    • https://feedproxy.google.com/~r/Uplcv/~3/DOqCt-cVA4I/uplcv?utm_term=smith+wigglesworth+books+free+downloadPDF 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_off0000ecd7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xECD7 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off000104e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x104E9 17780 bytes
SHA-256: 2b40be70257c954079ff635875ea9822d13201cb9c3a84726d593da16fffa615
font_02_sfnt_off000132c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x132C5 11196 bytes
SHA-256: 1b2841d9b68ba50ad898699d11c693e6641aa30ea304d3caa869fbcf61b60acc