Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6439d6a8e5bacf4…

MALICIOUS

PDF

45.5 KB Created: 2020-10-04 14:06:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: 2293bbb09217160b3304b430dc44034a SHA-1: 66537b3a6331d8fafbac52f2ca4eba6d6d38a200 SHA-256: e6439d6a8e5bacf44ed51d57b82d0147d6a8c492e6f670022efc5f5c24a4cf18
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://cctraff.ru/strik?keyword=gat+analytical+reasoning+questions+with+answers+pdf In PDF document text
    • http://kurakex.hairoftheferret.com/uploads/1/3/0/8/130813528/malaboru-gebuvixufugimi-molupom.pdfIn PDF document text
    • http://files.psychiatristsofmclean.com/uploads/1/3/1/4/131453749/6096699.pdfIn PDF document text
    • http://files.felicitystevens.com/uploads/1/3/1/4/131438741/7187302.pdfIn PDF document text
    • https://site-1037184.mozfiles.com/files/1037184/72646168015.pdfIn PDF document text
    • https://site-1036907.mozfiles.com/files/1036907/papimogarenituruvedopefem.pdfIn PDF document text
    • https://site-1036993.mozfiles.com/files/1036993/gelilipagewezafegasususe.pdfIn PDF document text
    • https://site-1040896.mozfiles.com/files/1040896/favurizodopupatabim.pdfIn PDF document text
    • https://site-1040164.mozfiles.com/files/1040164/zanojinoxilulojogobu.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://uploads.strikinglycdn.com/files/8b3a1d2e-9769-4dc9-a705-475201210d20/53717456241.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e3d1f2f-0080-4839-8feb-3d7309b7860f/mamemerumogitodopo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6d1b921c-ab29-4a5d-bc17-7886dc6af88c/dijesupijaladetawap.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1f0509ae-3223-4042-ae61-afb14ece7bf0/94823267502.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/2403/1137/files/giraffes_cant_dance_lesson_plan_growth_mindset.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0476/7619/4982/files/3506987411.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8547/1656/files/78356675332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2518/6466/files/90805941138.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5847/0813/files/dragon_warrior_3_gbc.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063d3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63D3 5652 bytes
SHA-256: d7816ab03c27bfbe5f4b33c5478d773362879bf33b54c59b9c135f8381611877
font_01_sfnt_off0000771b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x771B 10344 bytes
SHA-256: 9acae1c35b881e79683bc779ab14453440a82da81a555df8e89619c0fb3e170e
font_02_sfnt_off00009a71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A71 4324 bytes
SHA-256: 9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2

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