Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fe0232dc177a0f8…

MALICIOUS

PDF

35.1 KB Created: 2020-10-04 21:47:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-04
MD5: b1bb856d35d2d13d0c97bcbec775e037 SHA-1: ed1fecf3a8640b28a96ad4a6b56f6a9b81322e10 SHA-256: 7fe0232dc177a0f88734eeaf003957eb7b65fb4ec01047f326f0a27dad8e8442
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=research+methods+and+statistics+jackson+pdf In PDF document text
    • https://site-1039768.mozfiles.com/files/1039768/vuzepebejetesepa.pdfIn PDF document text
    • https://site-1036819.mozfiles.com/files/1036819/zetejutudubokiz.pdfIn PDF document text
    • https://site-1036876.mozfiles.com/files/1036876/vokimijom.pdfIn PDF document text
    • https://site-1037166.mozfiles.com/files/1037166/batizawozizokodufabe.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/ad275234-1ea8-45b9-985c-c8aa83e68e70/sipawupegudijiwixetevog.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/95112b6e-842c-4fc8-9934-268f03468147/59554942519.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b3e5f36f-39a2-4253-a76d-30f5d0dfa2a8/tinaniditumavesubetaraj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/47b226ae-f69e-4a12-a71f-1242cbb91089/5406495058.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8e3215cc-60ed-4d2f-b754-ce2c8026bcdb/banupaxetepileripevete.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/835634c6-61d1-4638-b75f-41bedf4150b6/zikowezerijojub.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4ccf5e1e-d2f4-4733-8b93-c6fdac98e9c1/49362999561.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/763a62fc-f212-4dd9-a5f5-815129979028/miradafudusaneluronomo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/052974a1-daaf-497d-b788-c7fff7969b4b/zusutalujozubuzu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe98d5fc-40ab-4aad-a190-b8dd2d4f2106/54720701560.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/126c5bcb-7864-448c-8b59-065e927c7bba/lidujewulevirateviriro.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/18a3a250-4c76-4d5d-88cc-d2af2ba9670e/19019215430.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_off00004ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BA2 5508 bytes
SHA-256: a3b5c0c93dbcc4f6a19365ec3c119bd7037c567fc6de3d4f80c124f6faa83661
font_01_sfnt_off00005e43.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E43 9728 bytes
SHA-256: 4ab0f80ae4429dc60ee2975c8001128d3f7ed2dc9c7971c7312d30755b5a6092