Malicious PDF — malware analysis report

Static analysis result for SHA-256 c34ae9f7912fcaec…

MALICIOUS

PDF

41.6 KB Created: 2020-11-02 04:46:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 13a8b90ae434edc5e15baf00813b73ec SHA-1: dc4b8d84a824f896688f5ef561319577e9a93567 SHA-256: c34ae9f7912fcaec26badeacacbd7fc7e9c2f2f501ba7edaa5fb11513c8e8a17
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/123?keyword=murphy+bed+diy+plans+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4393776/normal_5f9ba27d05e43.pdfIn PDF document text
    • https://dijumigomeruke.weebly.com/uploads/1/3/4/3/134309809/861bfe52c534eb4.pdfIn PDF document text
    • https://doleroxewaforud.weebly.com/uploads/1/3/4/3/134322791/rusozuxonikojime.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383923/normal_5f9508e09223d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384299/normal_5f8f2146cdd12.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4402707/normal_5f926a1c47f2f.pdfIn PDF document text
    • https://wefolukozik.weebly.com/uploads/1/3/1/4/131406413/724140.pdfIn PDF document text
    • https://pewovorawegoxuv.weebly.com/uploads/1/3/4/3/134351704/welosusaj.pdfIn PDF document text
    • https://lewejasolon.weebly.com/uploads/1/3/1/4/131437246/jefasujiziwujoxex.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/3aad53c6-1a48-4495-8216-7f5f3ed7bae3/betaxituzo.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_off000064da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64DA 5376 bytes
SHA-256: 72c0efbd1f7e184edb99d87ef13511aaa5913da83277ba7c51af1ddfbd56ea5b
font_01_sfnt_off00007725.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7725 10336 bytes
SHA-256: f9afb8039a043d65b839da0f368c99f3bc7144b0ed1784e4e1c160113aefabc0