Malicious PDF — malware analysis report

Static analysis result for SHA-256 b70293f7ed3425ec…

MALICIOUS

PDF

44.1 KB Created: 2020-10-15 02:17:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: a310391b7062b82c57ed9da3265a7a0d SHA-1: 6618d5def5aa91e7d549b6b1cfadd942c0525efb SHA-256: b70293f7ed3425ec29dd20cc7cb1763303c8ff881a0a1d9ff53156f7565c82e4
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://ggtraff.ru/pify?keyword=physics+study+guide+pdf+grade+11 In PDF document text
    • https://site-1041091.mozfiles.com/files/1041091/wibekat.pdfIn PDF document text
    • https://site-1036995.mozfiles.com/files/1036995/getos.pdfIn PDF document text
    • https://site-1042617.mozfiles.com/files/1042617/59419169710.pdfIn PDF document text
    • https://site-1039834.mozfiles.com/files/1039834/xapamukamegexoja.pdfIn PDF document text
    • https://site-1038391.mozfiles.com/files/1038391/57339405477.pdfIn PDF document text
    • https://site-1048186.mozfiles.com/files/1048186/64843320236.pdfIn PDF document text
    • https://site-1036958.mozfiles.com/files/1036958/jagopusulogomabujixifi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367279/normal_5f87389b28a48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365646/normal_5f876e71f03d9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367624/normal_5f87579d6e9d0.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/1/0437/1077/5464/files/miui_theme_apk_update.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/6399/6316/files/tuxewoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/2230/3399/files/44540277329.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5ad74855-afe0-4f0b-bc1f-dfda0990f904/85380352132.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1589657a-deed-4d18-aee6-19ca23a2ff8f/86154136724.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a6e07c93-154b-4702-a9d0-3215743fc6c0/69758530925.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c84f4404-a02f-46be-a3c4-0bdbad5017a4/sevafemafatax.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/578bfb9b-47b9-4611-832a-7133f62e2b46/dirofozumibu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a185b467-2963-429d-8723-b0550e29b8c2/8490606775.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d6670576-7676-402b-89d4-df0807bfe0db/zonimezavifokujimu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/efdf222b-50a4-4610-af13-b3a4472fd2db/kirileritilomolopet.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/796480f7-d5a5-4f3c-884e-76ce63854f0f/fakexebibixawem.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_off00006cd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD8 5540 bytes
SHA-256: 3605246eff976110ba91000e70d551eed07db7e635740a85957d57ce0b1899b5
font_01_sfnt_off00007fad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAD 10392 bytes
SHA-256: b1d1a01c7ff261c9f7de69ce5bbdc452ea0ae4d3657fe9e3a8dcc8d708ab664e