Malicious PDF — malware analysis report

Static analysis result for SHA-256 b186ebf27dcad8bf…

MALICIOUS

PDF

42.3 KB Created: 2020-10-16 20:43:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: 208d0f92a46d36a5f3f6834ad533b39c SHA-1: 68af7ae0547c7d39b2e3ee494eeb9e0700f5aec9 SHA-256: b186ebf27dcad8bfb94c94b6abb04cb4c638d8a92c10fa41c0c81593c8e0920e
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/strik?keyword=median+xl+necromancer In PDF document text
    • https://jatorogerujew.weebly.com/uploads/1/3/2/7/132710569/09b03b.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/f9007.pdfIn PDF document text
    • https://kuvofexe.weebly.com/uploads/1/3/1/1/131163751/wenosadi-zewinatogedavur.pdfIn PDF document text
    • https://podesasi.weebly.com/uploads/1/3/1/4/131437149/xexemupuka.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366309/normal_5f89ce1e9f7c9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366042/normal_5f875348d5dcb.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365583/normal_5f87f9aecf87e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370299/normal_5f89c7a63c147.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374533/normal_5f8913afd9ba2.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/8279037.pdfIn PDF document text
    • https://folarudivol.weebly.com/uploads/1/3/1/8/131871739/74b24bb15683a34.pdfIn PDF document text
    • https://finazodaxuvoj.weebly.com/uploads/1/3/2/6/132682535/22d40381d0a63.pdfIn PDF document text
    • https://jukafubu.weebly.com/uploads/1/3/0/8/130874261/nuvaw-kekido-ligudajo.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00005b59.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00005b59.bin)
    • http://www.daltonmaag.com/In extracted file (font_02_sfnt_off00008dd4.bin)
    • https://uploads.strikinglycdn.com/files/ce9a6086-6cf2-4a88-8baf-551d7362d2fa/gadodajixodimutu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8cb76902-8259-49fa-ac79-6960c7b94867/54532056070.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/48a1df20-6ea3-44f3-9d62-1135257e0e9f/daberijazujikifozuno.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/649a276c-eecb-4723-81fa-6877d9f98fea/78014794423.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3dd74fb8-2de6-49eb-911a-d817af15e02b/badovigusogigixaseraref.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1b727a7d-a0cc-42f8-bdfa-290280626c82/16044533429.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e7eb28a1-bb62-4c63-963a-68f030e6c99c/kegofesazifumu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/cbcd260a-b0c7-4262-8c5d-fa9a96600cfa/muxazufawirimevakoj.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/60984079-a7d5-4d91-bf86-f36d420029b3/39509883030.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 extracted file (font_00_sfnt_off00005b59.bin)

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b59.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B59 4688 bytes
SHA-256: ab7ecf0038f47c344e9d3ab94913ba5efe0e0a51401bbfdb263b715739fce8ef
font_01_sfnt_off00006b1d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B1D 10180 bytes
SHA-256: c99a93a9e85f121013c340c7d6c11b009a0948382ad94f4a04e442d239a225c0
font_02_sfnt_off00008dd4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD4 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378