Malicious PDF — malware analysis report

Static analysis result for SHA-256 666ce2b230d54bbb…

MALICIOUS

PDF

33.5 KB Created: 2020-10-30 16:19:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 553650f8ff84673264649dddc266cfe4 SHA-1: db36353316044ab8cbaad9fb08d89244f9b6411d SHA-256: 666ce2b230d54bbbb4b2cc953cefc913615c60123bac9e2c1849879b7c0a4c06
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://ggtraff.ru/aws?keyword=oggi+in+italia+textbook+answers In PDF document text
    • https://nuvisinuxaxo.weebly.com/uploads/1/3/1/3/131383681/4996967.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4420905/normal_5f98912028c6f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409814/normal_5f9c001faf7fb.pdfIn PDF document text
    • https://jufukakoxojopop.weebly.com/uploads/1/3/4/3/134317893/7025551.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374860/normal_5f899777ac16d.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/1/0492/9031/3884/files/zemadijomorow.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/6256/6298/files/kigufuwigaxojunotuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5178/6145/files/shigella_treatment_guidelines_cdc.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31ec0ee0-0c26-4f59-9fa6-30b57ae28c4a/tipivegevotufemeju.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/31dd2bee-e518-43da-8951-95f7fb915bf2/5059229134.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/55138187-2623-48e6-8744-a0519ab1aaed/24616495729.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e7f2fb5-330c-4a0a-b848-a3d93964b584/42829815489.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/08003552-d55c-4852-a3a0-eab4e8f7f922/37266913092.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_off000044e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x44E0 5244 bytes
SHA-256: 9aa45f93937c7702393ff196df22097697592cde4346edb8fbdccbde1f9f1334
font_01_sfnt_off000056dc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x56DC 10084 bytes
SHA-256: 40d88d35f6e518e9e2f885809325edf6af4d6f4e84c7f1d639416235cb17f9bb