Malicious PDF — malware analysis report

Static analysis result for SHA-256 4322d6536ea1e672…

MALICIOUS

PDF

39.4 KB Created: 2020-11-04 08:33:23 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: e02a42ffb0bec2f360da238baf1b7c4b SHA-1: d2e3e4e002e29815bf5b90d1f9110e599c6ed753 SHA-256: 4322d6536ea1e6729fac3086ed8f7ce5755035e8596f87291fb71b3749d75179
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file embeds a large number of external links characteristic of an SEO link farm and 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 4

  • 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.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • 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/strik?keyword=ukf8001axx+water+filter In PDF document text
    • https://cdn-cms.f-static.net/uploads/4451929/normal_5fa21ad9c4766.pdfIn PDF document text
    • https://lidovoji.weebly.com/uploads/1/3/4/3/134313359/2097619.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368768/normal_5f8af8fd2ae02.pdfIn PDF document text
    • https://levibezime.weebly.com/uploads/1/3/3/9/133986639/548ecf67a9cff8.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/e8edb9a.pdfIn PDF document text
    • https://xusawoji.weebly.com/uploads/1/3/0/7/130739635/3076381.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403537/normal_5f91e8d5d8307.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408703/normal_5f9a1cad58492.pdfIn PDF document text
    • https://daxedinojadu.weebly.com/uploads/1/3/4/5/134590150/mibodadap-berilusajo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366668/normal_5f8a797954f34.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378831/normal_5f8a2739750d5.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/giwurode/91508360082.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_off00005e3f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3F 5188 bytes
SHA-256: 3ccb296cf09371ee03f906c400556b7d8c8d1eac3dd63087412074e5690e7e7c
font_01_sfnt_off00007019.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7019 9652 bytes
SHA-256: fb0ee39ff17cc2de298b66f6f338172baae9a5d1a83505cfea60755808456e57