Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1eb6813a7651b0d…

MALICIOUS

PDF

43.9 KB Created: 2020-11-07 21:44:36 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-02-23
MD5: 722cafa170e4c26d836ec4d9a9b63d88 SHA-1: fdaf8408eb16a38104b9b3ebce41209b0871e7c8 SHA-256: d1eb6813a7651b0d9c473ea62d19d8a601d861f47474829f6ad7d1e0a80a7f6f
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://traffking.ru/aws?keyword=cia+style+guide In PDF document text
    • https://mavevataxivira.weebly.com/uploads/1/3/4/6/134600118/xopewapugubuk.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369765/normal_5fa15ba577852.pdfIn PDF document text
    • https://gifuroromila.weebly.com/uploads/1/3/4/3/134377961/8888489.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454677/normal_5fa69aa1826d5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366987/normal_5fa56180a3514.pdfIn PDF document text
    • https://zafozudakajadev.weebly.com/uploads/1/3/0/8/130814863/b628c54eef4e3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447906/normal_5fa44c740d3b7.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366036/normal_5f91c97acfac8.pdfIn PDF document text
    • https://xepuxewezikute.weebly.com/uploads/1/3/4/4/134437058/lefum.pdfIn PDF document text
    • https://temazojirilezin.weebly.com/uploads/1/3/2/3/132302863/6371426.pdfIn PDF document text
    • https://diveziriluro.weebly.com/uploads/1/3/4/4/134447321/5823111.pdfIn PDF document text
    • https://sisodiwitamusoz.weebly.com/uploads/1/3/2/6/132681746/3886014.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://fategokixeju.files.wordpress.com/2020/11/jasajapabuzodevuboja.pdfIn PDF document text
    • https://tiranarawuse.files.wordpress.com/2020/11/grade_1_art_lessons_primary_colours.pdfIn PDF document text
    • https://bakazowoti.files.wordpress.com/2020/11/formato_para_poliza_de_cheque_en_exc.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_off00006c6f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C6F 4904 bytes
SHA-256: 4e768c242461c302b1e9b95325f1b397e721ede5392ad2c0650337979fd3d38a
font_01_sfnt_off00007d37.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D37 10996 bytes
SHA-256: 255faa8bd4ad15bf0647d364a0faca5b64661c005a6e0e2a961ab6213e097c05

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