Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f3aa19bbcb5ee8d…

MALICIOUS

PDF

99.3 KB Created: 2022-04-24 13:33:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 5.11.3) First seen: 2026-05-03
MD5: 64cd684707767cd4fb88821af9295744 SHA-1: 15e81eec09ed4e03a09c87d6baa43b2bd5a8f02f SHA-256: 5f3aa19bbcb5ee8d0f1509fbb6fba1157ea1a0be676cca054decc731e9348bf1
186 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9986

Heuristics 6

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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://hoangvan.vn/wp-content/uploads/files/kixudugizonubuxewi.pdf In PDF document text
    • https://merohamro.com/ckfinder/userfiles/files/gozilugalojuxatorikodil.pdfIn PDF document text
    • https://wekakukuzibeli.weebly.com/uploads/1/3/4/0/134000436/loputobudenojozenep.pdfIn PDF document text
    • https://rotutipugav.weebly.com/uploads/1/3/4/7/134750083/tibowived_dowuzatigak.pdfIn PDF document text
    • https://embassyinvietnam.com/webroot/img/files/zikobavixuvu.pdfIn PDF document text
    • https://farazekij.weebly.com/uploads/1/3/4/3/134379469/3518834.pdfIn PDF document text
    • https://koralazuvumo.weebly.com/uploads/1/3/1/8/131871516/dimoxeronilol.pdfIn PDF document text
    • https://chulintemple.org/CKEdit/upload/files/75590118515.pdfIn PDF document text
    • https://fibepuranes.weebly.com/uploads/1/3/4/0/134041348/vofelofibozepow.pdfIn PDF document text
    • https://chupwo.com/editor_upload/file/72756549927.pdfIn PDF document text
    • https://dadrarad.ro/userfiles/file/35390694431.pdfIn PDF document text
    • https://cuisinescartier.ca/upload/editor/file/74310058111.pdfIn PDF document text
    • http://icltindia.in/userfiles/file/kuzakugakonodiwubaxa.pdfIn PDF document text
    • http://aven.su/kcfinder/upload/files/51316099588.pdfIn PDF document text
    • http://elcivan.com/admin/UserFiles/file/97237560653.pdfIn PDF document text
    • http://www.danvillern.com/wp-content/plugins/super-forms/uploads/php/files/ecc55935d5a1e7b819dfb961a86403ec/gebolukumomos.pdfIn PDF document text
    • https://kerekemanoniser.weebly.com/uploads/1/4/1/3/141322617/23f48.pdfIn PDF document text
    • https://dametubidino.weebly.com/uploads/1/3/1/3/131383661/diwikaladuwozonar.pdfIn PDF document text
    • https://sedufusirofop.weebly.com/uploads/1/3/7/5/137511108/wudinikax.pdfIn PDF document text
    • http://ratchadatitan.com/UserFiles/File/70472318864.pdfIn PDF document text
    • https://gasipepimajut.weebly.com/uploads/1/3/4/3/134367512/dibewi.pdfIn PDF document text
    • https://fecuq.co.za/YmrXLWy8?keyword=old%20yeller%20bookPDF 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 extracted file (font_00_sfnt_off00010ab5.bin)
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn extracted file (font_00_sfnt_off00010ab5.bin)

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00010ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10AB5 9988 bytes
SHA-256: 5eb48d5aa9b1ae4c9ec0a35f99ff5796959c4cc618f32ba2d509e47d33f0d419
font_01_sfnt_off000120ee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x120EE 16792 bytes
SHA-256: 9d2294e344127da9ddc2b77d68b1576b6b78373885bc9da2859f180a98f2c1e1
font_02_sfnt_off00013900.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x13900 18080 bytes
SHA-256: d73b111b22d832082165bb47fefb99c17f3776dd0199d68b2830e9dd4fbb9023
font_03_sfnt_off00016886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x16886 16644 bytes
SHA-256: e1603c184f595938873549750fbd4503de072d500b18eb1f400fccb95fea9fbf