Malicious PDF — malware analysis report

Static analysis result for SHA-256 89184aa34b9f7f5b…

MALICIOUS

PDF

45.2 KB Created: 2020-11-09 09:13:41 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: a95fd3616ec2858a2df3e8570287f1be SHA-1: 15b5b289dc6afd0a328b8afe6139ec0b9373f0a2 SHA-256: 89184aa34b9f7f5b2f0409dbddd79067e17960bd4c491f6c980a3c2e9f481957
66 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 1.0000

Heuristics 4

  • Small PDF is a non-clustered link farm on disposable hosting medium PDF_SEO_DISPOSABLE_LINK_FARM
    Small PDF contains many clickable external PDF links spread thin across many distinct hosts (no single dominant host), corroborated by a utm_term SEO-redirector link and/or links parked on free/disposable content hosts. This is the 'free document/template' SEO phishing PDF family, which ranks for search queries and routes users into payload/redirect chains, rather than a normal document citation pattern. The PDF itself carries no exploit — the risk is the linked destinations.
  • 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/123?keyword=unblocked+games+pro PDF link annotation
    • https://terogoke.weebly.com/uploads/1/3/4/5/134587715/vudiw-zezujogufapi-wuwapuda-wapigijususa.pdfIn PDF document text
    • https://gizojobov.weebly.com/uploads/1/3/4/4/134436228/majizada.pdfIn PDF document text
    • https://tajekuludukomas.weebly.com/uploads/1/3/4/4/134498487/3881676.pdfIn PDF document text
    • https://mubojage.weebly.com/uploads/1/3/4/3/134377346/loziwojivobuvadijoz.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/jusuberu/43213908868.pdfIn PDF document text
    • https://lusabun.files.wordpress.com/2020/11/warhammer_40k_codex_mega.pdfIn PDF document text
    • https://mutozofe.files.wordpress.com/2020/11/67728004733.pdfIn PDF document text
    • https://s3.amazonaws.com/fekazudabo/nijasilojuwara.pdfIn PDF document text
    • https://s3.amazonaws.com/vigevot/deteru.pdfIn PDF document text
    • https://s3.amazonaws.com/metakibeme/7678012961.pdfIn PDF document text
    • https://s3.amazonaws.com/banula/buddhism_in_china.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3040b06f-bf3b-4f9c-b560-7f48b87e25c2/dubodamakodimu.pdfIn PDF document text
    • https://s3.amazonaws.com/vavebufevodutob/poemas_de_jos_ngel_buesa_descargar_gratis.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_off00006e4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E4D 5588 bytes
SHA-256: 007cd8630eadf54c205ff7e08a48a0a17a0cf1b1c4edb56a31f839d6cd0059cc
font_01_sfnt_off00008134.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8134 12576 bytes
SHA-256: 60446676eddc2916a1a880bfb92bb60122c340ee45d09fc8f2f67489ffed20a4