Malicious PDF — malware analysis report

Static analysis result for SHA-256 0cb0fff376fe24c6…

MALICIOUS

PDF

45.3 KB Created: 2020-10-30 08:36:09 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 0c8e05915618d40336f107fb1c230040 SHA-1: d676d6eb52ee6cdf7847b8d3ac561ffe8519fab3 SHA-256: 0cb0fff376fe24c6953760d84f38722f51dfc4cec50a95ba3be8367d8ae023c4
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.com/123?keyword=music+for+writing+horror In PDF document text
    • https://febixitojujemo.weebly.com/uploads/1/3/4/4/134402622/6d5cd3626a67.pdfIn PDF document text
    • https://xibogunef.weebly.com/uploads/1/3/1/3/131398295/7351575.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4371266/normal_5f8eba6f8a1cd.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370087/normal_5f8e56831bdfa.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366989/normal_5f872b2d9afff.pdfIn PDF document text
    • https://dujenavu.weebly.com/uploads/1/3/4/3/134366251/dinakaxikuged.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370780/normal_5f92625a78c59.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368748/normal_5f87b57ead3f4.pdfIn PDF document text
    • https://worozimovazez.weebly.com/uploads/1/3/1/4/131406108/wejibogoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_5f8e990bde0d7.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/7502e5ce-0767-43f5-95db-7a135223c525/widesenumumavilugu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5a3dbf7d-5c3f-470a-a880-f875315b1f6e/xojisajabi.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_off0000713b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x713B 4996 bytes
SHA-256: e0ff58e854b7a67ed7137bdf365333399b7fad86008c63416d12679d045d02ea
font_01_sfnt_off0000825c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x825C 11716 bytes
SHA-256: 2941813acc1c6632e1d31f4b525a677964319c3e749b4db559252401faeb76db