Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3bcd05d00cfff6…

MALICIOUS

PDF

471.7 KB Created: 2021-07-03 21:24:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-06-05
MD5: cae78f2cd90de03d7e257304f43cb675 SHA-1: e3fbd1653b3c2705500cc97bd3821383fdf2f1eb SHA-256: 5f3bcd05d00cfff6dd92f20d3f7338b160e55b6b600b351b2d293f814513c475
74 Risk Score

Malware Insights

MITRE ATT&CK
T1059.007 JavaScript T1566.001 Spearphishing Attachment

The PDF contains embedded JavaScript, which is a common technique for executing malicious code. The ML classifier strongly indicated maliciousness, and several heuristics point to the use of compromised CMS upload storage for hosting malicious files. The embedded JavaScript likely attempts to redirect the user to one of the listed URLs, which are hosted on compromised websites, to download further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8450

Heuristics 5

  • 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.
  • 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://sirikulsteel.com/wp-content/plugins/formcraft/file-upload/server/content/files/1608e63d2c5cf4---nonivitopuredusobanofob.pdf In PDF document text
    • http://xn--80aaae7amexjfdlfdfg.xn--p1ai/files/file/78057185213.pdfIn PDF document text
    • http://dentalclinicbangalore.com/uploads/35267895032.pdfIn PDF document text
    • https://sfasg.jp/js/ckfinder/userfiles/files/vokunukuxarukidobafog.pdfIn PDF document text
    • https://rmdschoolandcollege.com/wp-content/plugins/super-forms/uploads/php/files/5rgkd0qghi58u409eik1ru6292/46031473038.pdfIn PDF document text
    • https://hsegroup.ru/wp-content/plugins/super-forms/uploads/php/files/vq9ku6718nb9o3l44lr6d8c2l3/ladisa.pdfIn PDF document text
    • https://www.diktu.com/wp-content/plugins/formcraft/file-upload/server/content/files/160d316041d1d0---renefakemaxomuwe.pdfIn PDF document text
    • https://kurtoglumob.com/upload/file/24338897195.pdfIn PDF document text
    • https://binarbaidequipment.com/public_html/userfiles/file/22533692056.pdfIn PDF document text
    • http://hoondb.com/wp-content/plugins/formcraft/file-upload/server/content/files/16092f97f697de---18808496208.pdfIn PDF document text
    • http://www.stallionreadymix.co.za/wp-content/plugins/formcraft/file-upload/server/content/files/1606e7e60baaa6---sixoturuwivivefadeku.pdfIn PDF document text
    • https://completecollegestrategies.com/wp-content/plugins/super-forms/uploads/php/files/f01a27a9df1ff7eef5f389adde20e19c/joweluwaxen.pdfIn PDF document text
    • http://balogmihaly.hu/UserFiles/file/bolegogob.pdfIn PDF document text
    • https://gift-edu.ru/wp-content/plugins/super-forms/uploads/php/files/4a2614f927cf44dda379c75217302fed/jitutilokavoxozokesogujo.pdfIn PDF document text
    • https://finances-canada.com/wp-content/plugins/super-forms/uploads/php/files/38c83a9840944dd6d84c9c00553a82c8/fazolakosoxewitalegamof.pdfIn PDF document text
    • http://www.medicalalliedtraining.com/wp-content/plugins/formcraft/file-upload/server/content/files/1609b109f04ff0---vunijurafuz.pdfIn PDF document text
    • https://vdbergelectro.nl/wp-content/plugins/super-forms/uploads/php/files/770464c0b75c77d28bf73162920c9382/bisawatefotekixemesozuno.pdfIn PDF document text
    • https://www.keystonecare.co.uk/wp-content/plugins/super-forms/uploads/php/files/507815f2510da403251316b20fb8cfa6/21824223496.pdfIn PDF document text
    • https://davebakeragency.com/wp-content/plugins/super-forms/uploads/php/files/4c189febdcff5d6703cbd4bb2b3072d0/51607856816.pdfIn PDF document text
    • http://sinara.org.br/wp-content/plugins/formcraft/file-upload/server/content/files/160872a4c2c2cc---11874396615.pdfIn PDF document text
    • https://alphaveneers.co.uk/wp-content/plugins/super-forms/uploads/php/files/15ba80529fdabf7b06a3633c545e2093/59838036403.pdfIn PDF document text
    • http://www.rolstoellift.com/wp-content/plugins/formcraft/file-upload/server/content/files/160871b3eb4169---serokogixokebuwivogire.pdfIn PDF document text
    • https://geneolock.com/locktactyuma/userfiles/file/58831220426.pdfIn PDF document text
    • https://amenagementsoleil.com/wp-content/plugins/formcraft/file-upload/server/content/files/160cbd778d13fe---nuzemazekisofadasaxuno.pdfIn PDF document text
    • https://feedproxy.google.com/~r/skout/mBVl/~3/YTWXjIUwRh0/uplcv?utm_term=show+all+databases+psqlPDF link annotation
    • http://lovewhereyoulv.wpengine.com/wp-content/plugins/super-forms/uploads/php/files/3420c072acc515ff8033213ab66876e6/rudeseretokesojatobek.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_off0006ee36.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6EE36 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_01_sfnt_off0007064d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7064D 10640 bytes
SHA-256: 244d847a7f865c7001992bd82710467d48842524fd8e7a62e6526664562c47bb
font_02_sfnt_off00071e6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71E6C 18200 bytes
SHA-256: 8896e79919b248e46c645fda7704a1d5336ca41c0bf55cd020b5c43fe413df19

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