Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad0906f82823220c…

MALICIOUS

PDF

35.8 KB Created: 2020-10-02 23:47:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 9ab65e60fbec5a7514355b17ced91728 SHA-1: 6c6c5c536d62af90115904e3f5ed2c208ede7859 SHA-256: ad0906f82823220c71d6d08ed4a1c86375ee6300ef9bfc97c8387d1a9e141f52
194 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.
  • 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/strik?keyword=palladium+books+pdf+download+free In PDF document text
    • http://files.teamhmac.com/uploads/1/3/1/3/131380745/vunituwasagib.pdfIn PDF document text
    • http://files.klinikjubilee.com/uploads/1/3/0/7/130740458/perowixo.pdfIn PDF document text
    • http://files.kutiepiesweets.com/uploads/1/3/0/7/130739119/8dd803e96.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/f4c691e8-de63-4a9f-b2a7-b927b15fb236/budakatitizowusunev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ab1c7107-bb33-4a6e-ad84-723306660dda/walevorazexonopazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5661/3544/files/ruxaxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/8890/6902/files/bronfenbrenner_bioecological_model.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7de1d3a-db8a-41e8-b837-0872aef2fb83/pinal.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/394be4f8-2042-4a09-a245-d1d5d07d2250/pifupebobefebitiwize.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c351f1c4-f606-460f-b673-b17d8334ea7e/vevevowogudivixo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d5a22e68-0582-4bd5-a0df-7b85152f92fa/nimeweme.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_off00004cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4CC9 5484 bytes
SHA-256: ec9fcd8c5a91c6f4eeb8f235f3ccc028b3595633fd486b940cd84578bf8d4f1d
font_01_sfnt_off00005f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F65 10276 bytes
SHA-256: c6a758411e4cc414b1cd97efa75f1c72171419d61dccc4c83e73d2f64fc01ad3