Malicious PDF — malware analysis report

Static analysis result for SHA-256 208b6d532fa40a9f…

MALICIOUS

PDF

38.8 KB Created: 2020-10-08 10:30:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 8cb953a73f545a9d5b13d7d149502d7c SHA-1: d16088227594e27cbbbd66b9d25cdf0235d83d5b SHA-256: 208b6d532fa40a9f42e48361991dd2cfd2bf4731d93cf4b6db81b29e07db44fb
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://cctraff.ru/pify?keyword=awesome+tanks+game+unblocked In PDF document text
    • http://files.bahr3arfen.com/uploads/1/3/1/6/131606617/nemuni_dowuborufakup.pdfIn PDF document text
    • http://gugal.thaideemaew.com/uploads/1/3/2/7/132740541/sitemi_tamip.pdfIn PDF document text
    • http://files.uniqueheartbeat.com/uploads/1/3/0/8/130874592/e78a3b016.pdfIn PDF document text
    • http://lowod.arenafootballtalk.com/uploads/1/3/2/6/132681946/xemoxege.pdfIn PDF document text
    • http://rawozeref.debbieyoung.co.uk/uploads/1/3/1/4/131406798/8193974.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/1/0429/1713/4502/files/ruresefijopipekikevafalat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1344/7584/files/83410739567.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9275/4076/files/phoneme_segmentation_fluency_word_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7607/3125/files/78872704541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/4975/1206/files/64369031751.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/87a38795-1b88-433d-b0a8-47c9b64a7bcc/lomasupuduwixu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d391b0a-d088-49ed-8702-b31bd08f48d8/67592306444.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c793a540-472d-4f8e-8352-45ce67a1fac9/56591517341.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_off00005877.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5877 5448 bytes
SHA-256: a392547c975e0ed3343aa7498bf02d3d1d51dbc7f5a02c4d297cd49a5cad78e7
font_01_sfnt_off00006b01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B01 10380 bytes
SHA-256: f27675491d78364431685a3b4c116fa7e2511baee254f9032aee99ee5f413819

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