Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a3f24b7f6c88faa…

MALICIOUS

PDF

42.1 KB Created: 2020-10-29 01:37:01 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 6295cb49286c821abc6ef3f7ba1c205d SHA-1: 6d8e97954b22bf25fd1eefb10db972152736aa4b SHA-256: 6a3f24b7f6c88faa46cb0298fbce734ab763be3fa324c1a35bdfb7e72f6069ae
134 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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/aws?keyword=clash+of+clans+gems+generator+online+no+download In PDF document text
    • https://mojivimimujovo.weebly.com/uploads/1/3/0/8/130874437/xefafimofaxeparekuji.pdfIn PDF document text
    • https://feloxoxux.weebly.com/uploads/1/3/4/0/134000485/7866129.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379030/normal_5f9457aa7dac2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376854/normal_5f8c05b31e1d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368218/normal_5f880bb99917b.pdfIn PDF document text
    • https://fukikabigo.weebly.com/uploads/1/3/4/4/134457586/nemujefalezitotaluxu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375200/normal_5f8f69e1a86fd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4388813/normal_5f9628e94f3b6.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00006390.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00006390.bin)
    • https://s3.amazonaws.com/sugaguxagu/a_twisted_tale_story_of_manipur.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/806a1c15-9bee-4a99-b23f-82d20ef3bcfb/97050996223.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/volerebuluvajo.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/10203782901.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0500/7107/7027/files/iti_wireman_practical_question_papers.pdfIn PDF document text
    • https://s3.amazonaws.com/zetare/tobivovitupak.pdfIn PDF document text
    • https://s3.amazonaws.com/biwuwukesazef/numbers_1-_10_worksheets_for_kindergarten.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/introduction_to_composite_materials_design_barbero.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/de601fed-0d83-4236-81f8-a2186d7c8656/purosifite.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/29945f9e-d018-4741-831d-60bd605b0e78/xogumasoxixobatoxenolebos.pdfIn PDF document text
    • https://s3.amazonaws.com/jikopot/treatment_of_acute_myocardial_infarction.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 extracted file (font_00_sfnt_off00006390.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6390 5432 bytes
SHA-256: f89fcc40ab4aabcc57c2a9ea26df07bc727603f28b8cfdf50af6c837a7d45016
font_01_sfnt_off000075e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E9 11396 bytes
SHA-256: 719a8675011d01ee8d68e0c482f1ca86ce4dd8f2c2f61134c738db22af77e407