Malicious PDF — malware analysis report

Static analysis result for SHA-256 2dde6be4c159500b…

MALICIOUS

PDF

71.4 KB Created: 2020-11-18 03:02:45 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 4948925ce7ef8d4ceaeefdf5907fd029 SHA-1: 2b5fa051d457ca163ab08526fe7fed15356ea0e0 SHA-256: 2dde6be4c159500bec9255e37ef20afbaefd1e62641c02a94a4e25cfe53298b3
96 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 embeds a large number of external links characteristic of an SEO link farm. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 4

  • 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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://traffine.ru/strik?utm_term=cabinet+plans+garage PDF link annotation
    • https://gowukamumikezaj.weebly.com/uploads/1/3/4/7/134769013/2e1b7c.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367959/normal_5f8b257e9f9d4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4385876/normal_5f9c23e1d6f58.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4461249/normal_5fb45708b558a.pdfIn PDF document text
    • https://mumixopid.weebly.com/uploads/1/3/1/8/131872042/wujago-ruxakudo.pdfIn PDF document text
    • https://lawamikakemudi.weebly.com/uploads/1/3/4/4/134477295/jogixivuwoji.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384028/normal_5fa99ddb357be.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365659/normal_5f876544cb10a.pdfIn PDF document text
    • https://bubixoduxufito.weebly.com/uploads/1/3/1/0/131070588/teromot.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/9242b544-3510-4371-b6b1-ed8fecb429e4/42449991571.pdfIn PDF document text
    • https://s3.amazonaws.com/jotizifime/smart_tv_box_android_l_g.pdfIn PDF document text
    • https://s3.amazonaws.com/nodetuxapabara/tasuvunenulowireme.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/242a379f-2686-475e-8085-bdfda0082e0b/sea_of_flames_stone.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_off0000dabc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDABC 5032 bytes
SHA-256: bc4a3e8d63701e68d7ff33f8445a4ad6168d804f47ea113cce7d14a2030ec651
font_01_sfnt_off0000ebde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEBDE 11040 bytes
SHA-256: fd9f0d4b70c3de09ca7e3bacd60ac875e8c4ea5dd76e90379d6e313b46baafb3