Malicious PDF — malware analysis report

Static analysis result for SHA-256 0f3226e80119da49…

MALICIOUS

PDF

671.3 KB Created: 2020-11-02 18:13:40 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 41a01688458ed623cee5d506c8ff3eb0 SHA-1: 04476b6b5004bfb695edc801d0a922ae715e4886 SHA-256: 0f3226e80119da49332c91e9862c593fa81eed6a844b06186e07bb6369ead182
94 Risk Score

Malware Insights

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

The PDF contains an embedded URL that is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains the same malicious URL, suggesting an attempt to lure the user to a harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9459

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=forge+of+empires+hall+of+fame+wiki In PDF document text
    • https://zonebudufekepok.weebly.com/uploads/1/3/4/3/134382159/329a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4421199/normal_5f9dae623c4ce.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4424040/normal_5f999d96c77e4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413850/normal_5f9f02c84846a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386849/normal_5f90dbfe793d8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5f8f663402f98.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1643/5891/files/85661130559.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/5179/2546/files/29589293044.pdfIn PDF document text
    • https://s3.amazonaws.com/rubidokezive/gta_san_andreas_cheat_codes_for_pc_file.pdfIn PDF document text
    • https://s3.amazonaws.com/leguvefu/43243819148.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0433b112-2b9e-4a2c-93f9-4f4b7636ff74/wendys_menu_nutritional_information.pdfIn PDF document text
    • https://s3.amazonaws.com/bubeto/dalabopalikodugipi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0507/1595/1297/files/mantis_tiller_carburetor_rebuild_kit.pdfIn PDF document text
    • https://s3.amazonaws.com/jumedemimo/ohio_new_hire_reporting_login.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0502/1204/4951/files/company_training_program.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_off000a3179.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA3179 5424 bytes
SHA-256: 26cda6c7e02dcff2830b621b14a3961d6e83ea5081d52a06f064eaf28b70cc7a
font_01_sfnt_off000a43e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA43E7 12052 bytes
SHA-256: be33090c18a7276830d22a9abe9949fe2df8657746aa21bed3292d5650c6c14d