Malicious PDF — malware analysis report

Static analysis result for SHA-256 9478d3ccb5c1f890…

MALICIOUS

PDF

43.3 KB Created: 2020-11-06 09:59:37 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 9e733e8f090ec3a56895b8d394c4fa02 SHA-1: 95e3d6b47227a02cd466ac13f472c7ff084de442 SHA-256: 9478d3ccb5c1f890e172e9728401e7ce433d9c8ce0ac2b0f0a23a936f3fcda28
234 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • 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.
  • Browser extension / update installation lure high SE_BROWSER_INSTALL_LURE
    Document tells the user to install a browser extension, plugin, viewer, or browser update to view content — a common social-engineering path for credential theft and malware installation
  • 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://traffking.ru/aws?keyword=navegadores+de+internet+windows+10 In PDF document text
    • https://bizetuxerupa.weebly.com/uploads/1/3/0/8/130873791/tabenumanipizup.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4452385/normal_5fa2a82ae42fe.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369305/normal_5f89001d910ef.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392656/normal_5f96eeef59e9e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4445337/normal_5f9db6515303d.pdfIn PDF document text
    • https://naxesitigas.weebly.com/uploads/1/3/0/7/130740165/xevufifefutipemibix.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/ligole/50879235466.pdfIn PDF document text
    • https://s3.amazonaws.com/panalipolifod/knights_of_pen_and_paper_2_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/waxapoz/73883517152.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/0975/8131/files/23867184046.pdfIn PDF document text
    • https://s3.amazonaws.com/pazifetanegapu/27868033678.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/arnold_joseph_toynbee.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b0bca466-4d7b-460a-b096-800a6d5efa62/28593964992.pdfIn PDF document text
    • https://s3.amazonaws.com/pewibim/peginawav.pdfIn PDF document text
    • https://s3.amazonaws.com/jezaxojipevu/losegega.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_off00006bac.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BAC 5276 bytes
SHA-256: 4dcd839ff547e90ae3d9bda5e6452423e42739dc5097e0dae5ddb3ac352313d9
font_01_sfnt_off00007dce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DCE 10040 bytes
SHA-256: b5646d65db550fd4707f3ab0ce4f68e8f093aa0b92b4f4d46f1624b6876ef07e

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