Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a36dfbcf3fedc4c…

MALICIOUS

PDF

39.7 KB Created: 2020-10-31 09:59:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: c92fb98b2df4b427b3cf5bfd433753de SHA-1: acb4aa44c5e1ea2b4cea31205664bbbc7ecb8ce0 SHA-256: 8a36dfbcf3fedc4cd8d7fba1195db24e4a2a5c0d5bb5429a23aa8f6240555caf
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://ttraff.cc/123?keyword=stoichiometry+mass-mass+relationships+worksheet+answers In PDF document text
    • https://debemalimuwu.weebly.com/uploads/1/3/4/3/134385929/gutowamevejiwefigo.pdfIn PDF document text
    • https://vukuzimina.weebly.com/uploads/1/3/4/1/134109202/7464258.pdfIn PDF document text
    • https://tubenuluni.weebly.com/uploads/1/3/1/4/131437864/b0a828.pdfIn PDF document text
    • https://naxedomabaxa.weebly.com/uploads/1/3/1/6/131606472/a7c41d.pdfIn PDF document text
    • https://koxoganonigowup.weebly.com/uploads/1/3/1/4/131408343/bunekik_nadirubisote_pofiwigitut.pdfIn PDF document text
    • https://xojisige.weebly.com/uploads/1/3/1/6/131637148/3171836.pdfIn PDF document text
    • https://fejamelaluboj.weebly.com/uploads/1/3/4/3/134311679/xiterawale.pdfIn PDF document text
    • https://lidenezat.weebly.com/uploads/1/3/4/3/134382714/9a6615f32a5200.pdfIn PDF document text
    • https://misutinulil.weebly.com/uploads/1/3/1/4/131407711/denebesaxademux.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/70abf18b-ca5e-4d06-a2ee-8bf415533eaf/brz_service_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ee257b76-774d-480f-8a48-e32c7a86ac16/alter_ego_5_cahier_d_exercices.pdfIn PDF document text
    • https://s3.amazonaws.com/fajonubinomeder/fodotefot.pdfIn PDF document text
    • https://s3.amazonaws.com/pevuwarobuvowa/chicco_nextfit_convertible_car_seat_infiniti.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_off00005b04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B04 5568 bytes
SHA-256: 62dc00c5d1f716bee3d7b677a7911da631fc59056d5c89a0971d91751ebb4d6d
font_01_sfnt_off00006de6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DE6 10524 bytes
SHA-256: 0aa7f33d53f8cfa783ac549449d122008f0b9c042492093f3c3fcae1c7a46cbe

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