Malicious PDF — malware analysis report

Static analysis result for SHA-256 5621bd168e92db25…

MALICIOUS

PDF

62.5 KB Created: 2020-11-01 06:40:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0501b50f99879c907a09a9109b371330 SHA-1: de89d73fbce97c0e63eaca046cc1d22b983b34c1 SHA-256: 5621bd168e92db25ddc7240d8755818aa5cf0874eb51f69f6b58890be68b7a7e
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/aws?keyword=24+volt+battery+operated+ride+on+toys In PDF document text
    • https://tebefatudu.weebly.com/uploads/1/3/4/3/134329870/32eb8110fa525e6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4415930/normal_5f9e05d7e6096.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378393/normal_5f90c41c87b6c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367000/normal_5f96249f616e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383930/normal_5f9c93bd4990b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370090/normal_5f961454cd8e9.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/77d258d1-99a5-421b-ad7e-06c2cf7f014b/paradise_island_2_mod_apk_rexdl.pdfIn PDF document text
    • https://s3.amazonaws.com/nezanurugega/esquizofrenia_paranoide_sintomas_positivos_y_negativos.pdfIn PDF document text
    • https://s3.amazonaws.com/tuzakifezara/rishabh_sinha_economics.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b4a79319-1805-4b24-8406-7c908e6a3e45/bootstrap_bill_turner_makeup.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7f61d9bb-fc29-4174-a8e9-2cac0bb23d99/pobiz.pdfIn PDF document text
    • https://s3.amazonaws.com/wilugugo/benedetto_croce_breviario_di_estetica.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_off0000b5f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB5F0 5380 bytes
SHA-256: 8acb89056ba99dca890ca2755f5eab54768dd2fc10278b06f8a4e11bcb1b73a9
font_01_sfnt_off0000c853.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC853 10720 bytes
SHA-256: 55134166c024d55bc5a6ea4eaa0e70370f1a0530242da19b24570485ce838d37