Malicious PDF — malware analysis report

Static analysis result for SHA-256 af9f4c09b1209a28…

MALICIOUS

PDF

38.5 KB Created: 2020-11-03 22:04:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-01-23
MD5: d379b6a112a272acbce9da49c103f618 SHA-1: ecf78eabbaf9411caa298e23240050041cf847ac SHA-256: af9f4c09b1209a28895c7d7ae211190d0a1fa7aeef229a00375a080aca4a459e
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://ggtraff.ru/wb?keyword=yadah%20tv%20live%20sunday%20service%20today In PDF document text
    • https://cdn-cms.f-static.net/uploads/4387716/normal_5f9a228578619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f886ac91ba65.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/650b3386-b7f1-4937-9458-11f58a947841/dowegilezimita.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/us_open_tennis_2018_draws.pdfIn PDF document text
    • https://s3.amazonaws.com/lebaxa/dafezidubatapebar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/456e1e34-9e53-4bad-9e7b-f637b3b7238a/vepekokabom.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99071082-7cd3-467b-9ada-4c48a60f274b/dosajaw.pdfIn PDF document text
    • https://s3.amazonaws.com/jamokaroxoj/64561728002.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7d59fb04-167e-4f41-a348-cd34ff79cada/66018337946.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/97d96aff-00c4-409d-a231-e603cf5ab430/device_id_apk_androidfilehost.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_off000058f3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x58F3 5148 bytes
SHA-256: 85a826ffaf3564a32f640424c0c95d83a1cc00749d3833a70b1d29b1bb32679b
font_01_sfnt_off00006a7f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7F 10276 bytes
SHA-256: 83f5a107313e1ce4da36f42311aa4637ad22d85661d10acce1954eaea6778727

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