Malicious PDF — malware analysis report

Static analysis result for SHA-256 0ecb0085ee78a0d9…

MALICIOUS

PDF

41.6 KB Created: 2020-10-08 15:29:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: bb789ef55b0e123f88fc44930c7df621 SHA-1: cf1175ba7c9c9d02abfe433a315c2364926d19f7 SHA-256: 0ecb0085ee78a0d93d5b5b6c5ead933acbb9b21aca0a08992f4d098825c7a38a
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://ggtraff.ru/pify?keyword=seneca+high+school+louisville+ky In PDF document text
    • http://tinabuful.nickydelariva.com/uploads/1/3/0/9/130969260/mudub.pdfIn PDF document text
    • http://vuropekeb.stadtdenken.com/uploads/1/3/1/3/131378960/rexeluzixomo.pdfIn PDF document text
    • http://zisisege.mindbodysoulutions.org/uploads/1/3/2/6/132681670/gorunoleviraz_vosozo_jomelijoti.pdfIn PDF document text
    • http://newokotal.castgurl.com/uploads/1/3/1/3/131380005/3167672.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/1098569e-ad43-478d-b2c1-a9c7cfbcb402/55513722436.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cad11a8-80f2-4e9d-89f4-905d841edb51/losozezuxegit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c1d48a14-f122-43f5-9812-26829a2f3068/69171112136.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1d261128-6d3b-4c04-9947-5caa0490adf0/xegagovumaxewum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6369/7817/files/89177728254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/9372/8666/files/injustice_gods_among_us_ipad_hack.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/2056/9752/files/fomurizuwoxujivilu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0470/9538/2174/files/71778905548.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0481/6637/1495/files/52307457038.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_off0000627b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x627B 5292 bytes
SHA-256: aff994aa3c7b59197db0cbc280cfec34ae3015ae9c80b5777cb065fc765eb781
font_01_sfnt_off0000748c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x748C 11008 bytes
SHA-256: 5b2967a7e07c7ec9ac8a20b4119e8a2ac2969f7d05b5230c33c4244c2d6ac3ef

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