Malicious PDF — malware analysis report

Static analysis result for SHA-256 b22dd8e3f355d140…

MALICIOUS

PDF

58.0 KB Created: 2020-11-02 04:00:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-04-01
MD5: 5bd52bf960d1cd0fdfaf3616a17e69b3 SHA-1: 513327581fa832cbc6a82403bd2ff0d9ec045a48 SHA-256: b22dd8e3f355d1404e5cc64c51c8fb5fec945bf9666a894c2399e4689ea0ffad
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/aws?keyword=pathfinder+recommended+feats+for+kineticist In PDF document text
    • https://rabexowubomisuw.weebly.com/uploads/1/3/1/4/131407155/kakiwipukof_babinapowenuzad_muxepurerazefef.pdfIn PDF document text
    • https://lezunodukulo.weebly.com/uploads/1/3/4/3/134341823/1828318.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368249/normal_5f9d403149ab9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374024/normal_5f8fcf5e56f79.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369643/normal_5f919e888c872.pdfIn PDF document text
    • https://bemogipe.weebly.com/uploads/1/3/4/3/134379528/9849be49d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376354/normal_5f8da573c09cb.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/66830e06-6f3b-4f41-b4b2-e15838d93fb8/created_by_and_last_modified_by.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b83dc848-965c-4733-91b7-fe4074112716/goridojinovadikugirenufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2538/1530/files/26290944211.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/7269/8521/files/jogikasunu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/5734/8247/files/26031604898.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7907/3436/files/all_guitar_scales_tabs.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_off0000a536.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA536 5292 bytes
SHA-256: 929bfed77fd392a68ee4e36b8bea81c4e6931b91a3d017dd1dfce8d8b3fa4b78
font_01_sfnt_off0000b70f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB70F 10480 bytes
SHA-256: 88d85767ff9986488bf4e23e96990582876cf8da84be6514bc558ff1fe00476c