Malicious PDF — malware analysis report

Static analysis result for SHA-256 695eb225f3c42f5d…

MALICIOUS

PDF

47.3 KB Created: 2020-10-12 02:26:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2fd5cb867d80e068e55ee527ffacb04e SHA-1: 7e28d40aebd4c496cf855c4f35ffb6ed7994f390 SHA-256: 695eb225f3c42f5dc5359de6a97a4f32d58632fde3b55fc46a78b69cf3420a90
184 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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 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.
  • 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://cctraff.ru/strik?keyword=plantilla+isometrica+para+imprimir In PDF document text
    • http://files.mairibudreau.com/uploads/1/3/0/7/130776864/ziwawajobigogefivane.pdfIn PDF document text
    • http://files.pfcmooremess.com/uploads/1/3/0/7/130776072/65264bc54.pdfIn PDF document text
    • https://site-1037073.mozfiles.com/files/1037073/busuped.pdfIn PDF document text
    • https://site-1040045.mozfiles.com/files/1040045/45930628467.pdfIn PDF document text
    • https://site-1036833.mozfiles.com/files/1036833/fenilofujeruguxot.pdfIn PDF document text
    • https://site-1037010.mozfiles.com/files/1037010/29413488827.pdfIn PDF document text
    • https://site-1043055.mozfiles.com/files/1043055/kisupejomiwekokazoviruz.pdfIn PDF document text
    • https://site-1037191.mozfiles.com/files/1037191/35912360644.pdfIn PDF document text
    • https://site-1040892.mozfiles.com/files/1040892/76790517117.pdfIn PDF document text
    • https://site-1036635.mozfiles.com/files/1036635/kufodijidavisewe.pdfIn PDF document text
    • https://site-1038390.mozfiles.com/files/1038390/moboj.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/1/0483/8565/4942/files/no_one_here_gets_out_alive_jerry_hopkins.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8766/7104/files/chilton_manual_download_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6563/4716/files/zewowobu.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_off00007890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7890 5080 bytes
SHA-256: 9e76d24b663f7d00890bcc5928fcdcc130c88234afbf6d9776aeebb16b4f4261
font_01_sfnt_off000089b6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89B6 11400 bytes
SHA-256: 8ff8728ecbdc2790aa833d7498a412dd67e1980d80ca932102c95b743199f8db