Malicious PDF — malware analysis report

Static analysis result for SHA-256 e25371d8e53151a8…

MALICIOUS

PDF

42.1 KB Created: 2020-11-02 04:48:44 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 52aefd964aef979616f4c0f61c05918d SHA-1: 97979e13a9cb70a3d0df23ce18e974e5e4ba4112 SHA-256: e25371d8e53151a8cb09434d1d6a26eb585f44440c71b3722e54b3c37f3bef71
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://ttraff.ru/123?keyword=subway+surfers+online+game+play In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/sasufufa/fatalu.pdfIn PDF document text
    • https://s3.amazonaws.com/purixifusipelid/zugobulozubiteg.pdfIn PDF document text
    • https://s3.amazonaws.com/lomogas/sticks_n_stuff_st_albans_vt.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30431fd9-4f75-4c91-83cd-e1f84ee1d06e/dutijise.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/0edc76f7-d5e7-4162-864e-e8ca79d46a43/24751129669.pdfIn PDF document text
    • https://s3.amazonaws.com/vonusirukete/brief_history_of_computer_graphics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/0843/2541/files/mantra_vajrasattva_traduction.pdfIn PDF document text
    • https://s3.amazonaws.com/memul/sonedobojaxatetekumowofew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4443/7144/files/healthy_snacks_for_diabetics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0503/1621/4439/files/toastmaster_word_of_the_day_ideas.pdfIn PDF document text
    • https://s3.amazonaws.com/kakef/59257304816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/8378/3075/files/toyota_corolla_service_manual_free_download.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_off00006537.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6537 5656 bytes
SHA-256: 676d0eb4c548ede30548299c9c779ce5adaaf642221e6bc12a75474aec49fd10
font_01_sfnt_off0000787f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x787F 10368 bytes
SHA-256: af70f01ccf04016d268bdff244dfcbfd031152f596550af627a7d01f91b21a46