Malicious PDF — malware analysis report

Static analysis result for SHA-256 2e8a364c413bccac…

MALICIOUS

PDF

34.2 KB Created: 2020-10-27 15:43:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-12-26
MD5: be75d6e73a97a30da0b8dd009ad1c9bf SHA-1: 7f705cff9e30490cc7e4b61c4ab82bc795eafe40 SHA-256: 2e8a364c413bccac8b64f994f627aa51ef2bd7b3d2a2131db95e2a07dd43ce8e
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://cctraff.ru/123?keyword=holt+middle+school+math+answer+key In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368230/normal_5f8b46164f9cc.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382201/normal_5f8caf49e5b2a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375531/normal_5f93c1b85c6eb.pdfIn PDF document text
    • https://firerokuk.weebly.com/uploads/1/3/1/1/131164187/4198302.pdfIn PDF document text
    • https://sakukavazu.weebly.com/uploads/1/3/1/3/131379729/dobadetodawavori.pdfIn PDF document text
    • https://buveziketi.weebly.com/uploads/1/3/1/3/131398526/452448c0584.pdfIn PDF document text
    • https://mogezisatizate.weebly.com/uploads/1/3/0/7/130775403/koguzobovipigi_teberanugan.pdfIn PDF document text
    • https://nudopimiga.weebly.com/uploads/1/3/1/0/131070212/toxifimo.pdfIn PDF document text
    • https://tiposowa.weebly.com/uploads/1/3/1/1/131164246/13433fe.pdfIn PDF document text
    • https://limikasideg.weebly.com/uploads/1/3/4/4/134446439/dodesod_wipodip_keriwaz_fuwowali.pdfIn PDF document text
    • https://xabisemegebo.weebly.com/uploads/1/3/4/4/134491474/wetadukimekim.pdfIn PDF document text
    • https://bovitala.weebly.com/uploads/1/3/4/4/134497817/sitivux_widan.pdfIn PDF document text
    • https://mesipaku.weebly.com/uploads/1/3/1/3/131383407/1940959.pdfIn PDF document text
    • https://vekaluledezo.weebly.com/uploads/1/3/4/2/134235689/8126262.pdfIn PDF document text
    • http://www.ascendercorp.com/In extracted file (font_00_sfnt_off00004c99.bin)
    • http://www.ascendercorp.com/typedesigners.htmlIn extracted file (font_00_sfnt_off00004c99.bin)
    • https://s3.amazonaws.com/xurixado/conformational_isomerism_in_n_butane.pdfIn PDF document text
    • https://s3.amazonaws.com/domegagowevag/94053774241.pdfIn PDF document text
    • https://s3.amazonaws.com/kavitokolezub/padineteludinuzukarefito.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/af0ca854-fa93-45e7-8342-63ae00310cc2/vanoxasajakimofi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f73687d7-24da-4363-a39a-421847eb5096/felififakuvob.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9554cecf-71b0-4e98-a034-a06d5a757ffa/dozifobopijasatuzavido.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/ae20ea7e-3e43-4277-a3f1-b3b6785d9763/506706863.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4ae4a7c-02de-405e-97f0-7b22a6bfc67d/no_seu_olhar_nicholas_sparks.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_off00004c99.bin)

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c99.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4C99 5396 bytes
SHA-256: 357ed278a48c209d166807c5ff73439a6c376ef588aca72489b6405e14a39ca4
font_01_sfnt_off00005eda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EDA 8488 bytes
SHA-256: 9624f810195638c44c8ad77629008a9a4df866ce02fab96df1c5fe34248a8b4e