Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa9c63f11857c3ec…

MALICIOUS

PDF

82.9 KB Created: 2021-03-02 08:41:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-18
MD5: ac8d0d8324fb6d32bb5cb93159fc1812 SHA-1: 901695ff7bc0bef87749afde81cca603410964a6 SHA-256: fa9c63f11857c3ec8c2ea55f0c6d19ca749dd38544266e87f8ccc0904fbfaf51
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 0.9998

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://leonvi.ru/123?utm_term=is+canon+90d+worth+it PDF link annotation
    • http://zakomuxoza.getenjoyment.net/human_trafficking_awareness_month_social_media_posts.pdfIn PDF document text
    • http://nipokaxa.getenjoyment.net/83119289840.pdfIn PDF document text
    • https://cdn.sqhk.co/xosuridasago/Hshjpgd/61531352264.pdfIn PDF document text
    • https://cdn.sqhk.co/wugoselubiki/diejiFO/total_destruction_definition.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419001/normal_6021856494a13.pdfIn PDF document text
    • https://cdn.sqhk.co/feguzuvubut/iqgiXNu/bubble_guppies_fire_truck_episode.pdfIn PDF document text
    • https://munuteme.weebly.com/uploads/1/3/4/8/134862418/vufadojebupizan.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4377388/normal_5fcf6c6000346.pdfIn PDF document text
    • https://cdn.sqhk.co/rosafipex/SCmaSYL/paper_airplane_toss_app.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4386621/normal_60219b952eae1.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/xupovobejanam/51369507714.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/arborist_report_fees.pdfIn PDF document text
    • https://s3.amazonaws.com/jaxesabi/tamil_hollywood_animals_full_movie.pdfIn PDF document text
    • https://s3.amazonaws.com/wisuw/firemotoloposaxipobumew.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_off00010599.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10599 5320 bytes
SHA-256: a816322f5992c46e73d7260cd9ffc42cbe3c55c316f20de11bb369bc007ed641
font_01_sfnt_off000117b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x117B7 11640 bytes
SHA-256: af7a3e912716d091a6b81156dea5c7117abaec3e007ad17870ce468cbe2d7f3a