Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6de6ebb53ac02af…

MALICIOUS

PDF

42.6 KB Created: 2020-10-02 10:21:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: a20424b3e3e76c840cd10a5feb6c5f0e SHA-1: 946e0e2df40357c8b6e2c7960ac818b0be9a3173 SHA-256: f6de6ebb53ac02af9546cd8641ba14554d4946dcfde1958ddb6b81799ad7af70
124 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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.
  • 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://gettraff.ru/strik?keyword=essential+words+for+the+ielts+pdf+free In PDF document text
    • http://wederumip.ferdinandeibl.com/uploads/1/3/1/4/131407267/junipuzopem.pdfIn PDF document text
    • http://files.eggsellentcafevenice.com/uploads/1/3/0/9/130969762/guwumibuguvokez.pdfIn PDF document text
    • https://site-1037224.mozfiles.com/files/1037224/toxukozosekijidijupovu.pdfIn PDF document text
    • https://site-1039840.mozfiles.com/files/1039840/53084825090.pdfIn PDF document text
    • https://site-1036977.mozfiles.com/files/1036977/36913315857.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/pikazezarujumovik.pdfIn PDF document text
    • https://site-1036629.mozfiles.com/files/1036629/wefezotol.pdfIn PDF document text
    • https://site-1036693.mozfiles.com/files/1036693/kufogixunenufamewevorater.pdfIn PDF document text
    • https://site-1039898.mozfiles.com/files/1039898/89884598647.pdfIn PDF document text
    • https://site-1036988.mozfiles.com/files/1036988/35872755930.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/4558/0700/files/20th_anniversary_ideas_during_covid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7024/2460/files/actex_study_manual_exam_pa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/2282/9728/files/sikuz.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://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000061a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61A2 5176 bytes
SHA-256: 7db9b301f4d23f342b5103581164aec941e65598572754741fe8b29718c8892e
font_01_sfnt_off0000734e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x734E 13564 bytes
SHA-256: af7a1f0afb147981aabc25dfb4768cb941c2a923188eb6d90dd5046262c8e394