Malicious PDF — malware analysis report

Static analysis result for SHA-256 5016210075d1c4d5…

MALICIOUS

PDF

36.8 KB Created: 2020-09-29 18:31:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 8ae2997a280e9bc2b75e81e86271abe6 SHA-1: 7b58a38ce766e174348e3244db7366986927122d SHA-256: 5016210075d1c4d565cf12824610e636dddb4bdbfc63c109ee26b82b96ac09ba
134 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/strik?keyword=guru+graha+stotram+in+telugu+pdf In PDF document text
    • http://fekotevip.mollysteinwald.com/uploads/1/3/0/8/130873872/9fe8c.pdfIn PDF document text
    • http://dadudigig.shsu-catholic.org/uploads/1/3/1/3/131383791/a4ca084bb03cb.pdfIn PDF document text
    • http://nevud.kevinberrybooks.com/uploads/1/3/0/7/130739906/a8a56366d94f.pdfIn PDF document text
    • http://files.verdantrepublic.com/uploads/1/3/1/3/131384101/fc057b18603.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/1/0440/2891/9973/files/viber_for_iphone_5_free.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8be04dc0-79f2-44b3-82e9-9b97a6bb8320/jijolajugixibesirawepid.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/50076bc4-b349-48b6-b1e1-da370628513a/13715035392.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17774a77-1c13-4cd0-b478-caab9f810acc/jamisirogunabesoxagadeda.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0459/1271/files/disolenowilile.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6626/0642/files/savaselasagu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/65179743558.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3034/7938/files/gukogowu.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_off00004b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B04 5488 bytes
SHA-256: 0f5757a6467415ac2d86fffecf9494c4ffe6c437c2c54683791055bbdb2f93f7
font_01_sfnt_off00005d8a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D8A 13656 bytes
SHA-256: 372fb0453d19c11251af96e7f05db69b9bf82d572545edb61dbdf1e37ef8d921

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