Malicious PDF — malware analysis report

Static analysis result for SHA-256 490e0fa31a62c192…

MALICIOUS

PDF

43.5 KB Created: 2020-10-16 04:05:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: 2305aae630e660a7c8174ebcc1b6f6ca SHA-1: d372878983701d5a75553cb4d0139c5f2a8112ad SHA-256: 490e0fa31a62c1922faa3c5b152d84113ba1a3896fe0b3d108a464ef68cac0f1
124 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.
  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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=schedule+application+start+android In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368955/normal_5f88d23cc2387.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f87b22addc85.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370985/normal_5f88cadbb8fa8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369916/normal_5f88da0dd084b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366399/normal_5f871a3038000.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369166/normal_5f87e66197ce2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366348/normal_5f87a3e459f5d.pdfIn PDF document text
    • https://site-1036630.mozfiles.com/files/1036630/lojizuwe.pdfIn PDF document text
    • https://site-1044154.mozfiles.com/files/1044154/96770020888.pdfIn PDF document text
    • https://site-1041688.mozfiles.com/files/1041688/difilopexisonatuvun.pdfIn PDF document text
    • https://site-1043691.mozfiles.com/files/1043691/38994165804.pdfIn PDF document text
    • https://site-1043933.mozfiles.com/files/1043933/rorazuxugawusojitix.pdfIn PDF document text
    • https://site-1037835.mozfiles.com/files/1037835/gulujenuxagunu.pdfIn PDF document text
    • https://site-1040284.mozfiles.com/files/1040284/votagevosoxab.pdfIn PDF document text
    • https://site-1039484.mozfiles.com/files/1039484/37860230130.pdfIn PDF document text
    • https://site-1038511.mozfiles.com/files/1038511/56556427211.pdfIn PDF document text
    • https://site-1042355.mozfiles.com/files/1042355/61283521963.pdfIn PDF document text
    • https://site-1042092.mozfiles.com/files/1042092/android_pie_caller_id_settings.pdfIn PDF document text
    • https://site-1041074.mozfiles.com/files/1041074/womuruzefugutogovekabode.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/3ae9a85d-f0f2-41f1-a653-adf9dcc5f971/duverupafi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/422c86ec-4e65-4c10-9475-f1eddf5ee95a/76812631092.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/429ef777-ad32-4cfd-b7df-c84b8d3d99e5/wibopuxarobaputimisukizuk.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0447e66e-b260-475a-b7a1-8902f09fbe57/kolewolenurijinosuwudev.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3316c3d9-e66e-4a6e-95d2-7b284de87b42/65123489305.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_off00006b6d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B6D 5264 bytes
SHA-256: 9262ee749a93efc8298000c7d8caacc3f5d3e1add66a57a08f96284e69942173
font_01_sfnt_off00007d3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D3B 10304 bytes
SHA-256: 0d095feb2c49701c823910a644e266a08cccd99e46fc24f88bdb5c18a88bdd6e

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