Malicious PDF — malware analysis report

Static analysis result for SHA-256 72f204aa216e6c74…

MALICIOUS

PDF

48.6 KB Created: 2020-11-02 19:48:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 81f6839936942a6408c7fc37b1b77bc9 SHA-1: ca6bcebcb2ef5e88d5ea9563e684ad95186296b1 SHA-256: 72f204aa216e6c7498aebff47588b8aed7c4efadc7e0763c3836ce82eec3b1ad
94 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector. The document body, though heavily obfuscated, appears to contain the same URL. The ML classifier also flagged this PDF with high confidence, indicating malicious intent.

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.club/123?keyword=how+to+delete+questions+on+yahoo+answers In PDF document text
    • https://xojerajap.weebly.com/uploads/1/3/1/3/131384359/zebapesuluboxaj.pdfIn PDF document text
    • https://bupiwuzisulim.weebly.com/uploads/1/3/0/8/130874125/6ad4fe5dfbb9009.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/zijivevip/free_chilton_repair_manuals_online.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b39c1751-ebc0-4fdd-b1ee-0a8aac09d018/jason_portmess_uf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/49fd8971-9b07-4b68-ba5f-6d4111c38b7e/99196120299.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6765d758-fdbf-445c-afba-471a06d19d2c/madina_book_1.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/19f7ff4d-97dc-48c4-8038-9c34a3f8de95/faxalatipidusitedubizawa.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/99cb2799-b5c0-4474-b4a2-d8468d08bc05/89533533629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0501/6118/9040/files/kindergarten_math_worksheets.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8611/9079/files/adrenal_crisis_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/subud/11599298413.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6be061dd-5636-4eb7-a35b-24a456f8b67d/46858270349.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_off00007d20.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D20 5192 bytes
SHA-256: 6e37a6695c36efe63ccf5c02b7928888061dd357a4af8bb593d6ab8723013d82
font_01_sfnt_off00008ed1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED1 11276 bytes
SHA-256: 52438ceeae9610656ea611e7be9b36948c1a9fd2c1a6f0c88c2c544b479399d7