Malicious PDF — malware analysis report

Static analysis result for SHA-256 f431cc095f7bbac3…

MALICIOUS

PDF

44.2 KB Created: 2020-10-15 10:34:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 5ecc5c1692da94c18185c33e5e4f53a0 SHA-1: 7c9727dfcd688335b488e6c522b0be09864d90f9 SHA-256: f431cc095f7bbac3f8491109dbafd6b3f4997880af1a046cd69c399216485313
184 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.
  • 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://gettraff.ru/123?keyword=xmeye+app+download+for+android In PDF document text
    • https://site-1039179.mozfiles.com/files/1039179/josaxenugigibuxega.pdfIn PDF document text
    • https://site-1042104.mozfiles.com/files/1042104/87070442749.pdfIn PDF document text
    • https://site-1041766.mozfiles.com/files/1041766/sigijenuwetirezexotifo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368964/normal_5f87df8f946a4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366057/normal_5f870bc2908ee.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366313/normal_5f871d6fb3add.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f872ddac2c92.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365656/normal_5f8705bcdbb88.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366664/normal_5f87adb620ee2.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366000/normal_5f876b2703ac0.pdfIn PDF document text
    • https://site-1045331.mozfiles.com/files/1045331/wutimofubevuvejonor.pdfIn PDF document text
    • https://site-1042781.mozfiles.com/files/1042781/molaterazelidum.pdfIn PDF document text
    • https://lodirunesu.weebly.com/uploads/1/3/0/8/130874391/9329271.pdfIn PDF document text
    • https://berajuvexoru.weebly.com/uploads/1/3/1/8/131860787/zekipofusukux.pdfIn PDF document text
    • https://tajurasexir.weebly.com/uploads/1/3/1/6/131606020/forukoxofi_metizubaxanava_bezurese_lirekox.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/1/0496/1868/2007/files/xasez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9825/1165/files/centrifugal_pump_handbook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3461/3659/files/63907267190.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_off00006e23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E23 5180 bytes
SHA-256: 4b33b399d0daf38d9a6dac4cffda234253f9eef329e13bc6a570b9818a3049c8
font_01_sfnt_off00007fc4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FC4 10516 bytes
SHA-256: d4715f52eff7faf491cf38933dd7f7e6eead6511d9087d0d1dd48a1a7cf31e7d

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