Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f92a0a1c74fc6f7…

MALICIOUS

PDF

57.8 KB Created: 2020-10-13 10:12:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: d5be58d5b28b515032bf873c9a4431f2 SHA-1: 402346b7c21a0a8097b5d31bec8c35d721a8d813 SHA-256: 5f92a0a1c74fc6f7c1282896cd9ed581f8f639a335cce64fc71633edcb56f07b
192 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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/strik?keyword=grand+mafia+crime+game+download+apk In PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://mogilifus.weebly.com/uploads/1/3/0/7/130739831/40ddfa4d7f4e3e.pdfIn PDF document text
    • https://gimejexoxixaza.weebly.com/uploads/1/3/1/8/131872185/b4b3eb38b.pdfIn PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/8c3f11ed.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/xewuj.pdfIn PDF document text
    • https://guwomenod.weebly.com/uploads/1/3/0/8/130873843/palaj_xofepevez.pdfIn PDF document text
    • https://bedizegoresupa.weebly.com/uploads/1/3/1/3/131379398/8e42bfb8d1b0f.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.opentle.orgIn PDF document text
    • https://uploads.strikinglycdn.com/files/41de4721-3a43-4625-b1fb-4ed43b4ec33a/92897123595.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0f2b6428-86e1-4fa1-9449-3a5727c6fe4f/lasezijirif.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ddaf4a36-fcb4-4ac3-97f9-efd440375555/dukoxuvagatamijilebis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5dcded6b-a280-408b-a89a-618547b66d25/xefotarin.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c718eafe-c9e3-4b11-8d94-d58308b7840a/9398574016.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/16383367-e427-4e2d-9c10-26990ad10d69/kasemunidoweliwitoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2dc10759-adfc-4383-9652-f0c6186bd938/11126455043.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d08189d-4e3d-4014-997a-c2b8f2afd020/51957694090.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1fcb67bf-2d84-4396-b483-7e524bd5f538/95603062044.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
    • http://www.gnu.org/licenses/gpl.htmlIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006b4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B4A 5484 bytes
SHA-256: 95934f93e7a7c28aeb0afa0f2d95947a48569a71868bfd54a72884b2a783d8ea
font_01_sfnt_off00007deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DEB 8680 bytes
SHA-256: 4b2c53a9ebca111f0a79c18847404ec6f91ab95fb2e56e143fb4380dc69c5511
font_02_sfnt_off0000962c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x962C 14804 bytes
SHA-256: f16e748f03e5d930e41fc17f0b9d251b3f50d9ce7679d4629307c2a5348fe7b8
font_03_sfnt_off0000c4a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC4A1 16092 bytes
SHA-256: e9fe716c2abc985b12a899a49d5539e4e8be1b56d50c083b30290d85a2a7c848