Malicious PDF — malware analysis report

Static analysis result for SHA-256 f19eb8a19e202d21…

MALICIOUS

PDF

42.4 KB Created: 2020-11-03 18:39:49 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 8c87407e92b480f537d6544b5b28c316 SHA-1: d517ec3ee3c02382b0d2f99d2121778f14e93b39 SHA-256: f19eb8a19e202d2182245e9f73427367b4d186393b25685a381e2fd2ba40bc64
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/strik?keyword=crc+handbook+of+chemistry In PDF document text
    • https://cdn-cms.f-static.net/uploads/4406463/normal_5f933a8ee15d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372681/normal_5f89c6e3c6821.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://s3.amazonaws.com/forupokisip/dojipibikasikot.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5ae7787-dc89-4e51-9120-052ed6d2076f/naniwikezaruvegikor.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5fe5f800-1d9b-440b-ad14-fe94107b0d84/bilizemogutop.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d67882cc-7e73-43fc-973c-a92a50f75956/52583252208.pdfIn PDF document text
    • https://s3.amazonaws.com/zerejibixupav/cset_subtest_3_study_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/322d6ce6-488f-4f94-b777-11fa240fc3ad/melagizizovusezonaru.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f644eb88-2274-4ae3-b88f-7c77b72f1302/5557032350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fd7d0d80-6f65-46e1-b377-c4d7443a034d/15968888789.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000059e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E4 5344 bytes
SHA-256: 9855da94463c8bb2f84fc4adec44b18c4c86363ee63f4a21c55a133e79e4b14e
font_01_sfnt_off00006bdf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BDF 10360 bytes
SHA-256: 3426b2583a0097d3916682c9fdec577fe065ad11d0a59fabca0b57e348c3404c
font_02_sfnt_off00008f06.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F06 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3