Malicious PDF — malware analysis report

Static analysis result for SHA-256 78b893ede8f43390…

MALICIOUS

PDF

43.9 KB Created: 2020-10-17 01:30:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-15
MD5: ef41e89a4a6eada67fc5e7fab939aa6d SHA-1: 3b1b47fece418f88f1d214e48a825114272a731c SHA-256: 78b893ede8f4339037849849c64b4c6a2453946ef8bd2b729a660f731e713cc3
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://ttraff.me/123?keyword=sainik+school+book+pdf+download In PDF document text
    • https://wetuxabo.weebly.com/uploads/1/3/0/8/130873937/bikabivekos_paperuwufaxefi.pdfIn PDF document text
    • https://pepuzategazeg.weebly.com/uploads/1/3/1/4/131453576/13228d.pdfIn PDF document text
    • https://namunobuwuper.weebly.com/uploads/1/3/0/7/130776476/donepogoruxo-bizaj-kigim-xunap.pdfIn PDF document text
    • https://tavumake.weebly.com/uploads/1/3/2/7/132740551/bilorezelilawu_kekepi_ruvazevi_tukiriz.pdfIn PDF document text
    • https://goduvozimaku.weebly.com/uploads/1/3/1/3/131380582/c341d946d8d.pdfIn PDF document text
    • https://fidurelofomus.weebly.com/uploads/1/3/0/7/130740547/0e43567fe649.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367645/normal_5f883b8f207d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365653/normal_5f87382c9c5be.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/7d993496-0900-4707-a964-3eb7f6f09306/fasipegu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/772e08e8-129b-42cf-ba29-7164074b04bb/21942140988.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b938b9a3-c8b5-4208-8df2-57f83b67ad6b/the_covenant_2006_full_movie_in_hind.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5081742c-ab45-4c98-a0ed-239b98b5d600/wokoguluvowez.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/32e73a22-38b4-4cf2-ae0c-966585cb449d/tomano.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/2970/6910/files/misuse_of_cell_phones_introduction.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5240/0789/files/92406496146.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/258a0d90-394e-442a-8ee4-099b953ca9ce/35119220571.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/a7589d28-010a-4994-a060-3e37bd072761/gozipotogo.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e78ce511-36cd-463b-9087-6f00a70c2247/viwilefazezewaxedafep.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0467017a-fe9a-49af-b263-3484d0ea0324/fusufukusitiwil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aec1d35f-0e8a-432b-9556-dd5a18f379a5/xevutatiboxev.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_off00006a26.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 5544 bytes
SHA-256: 2d8143857d54c1b0167f9ec667b9b0e671bef55f26765938fed124e76bcaf137
font_01_sfnt_off00007d00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D00 10444 bytes
SHA-256: 8fd00ed7fead31cce73de9ebc9c39b64da13d11190b96e5901500f18175716d8

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