Malicious PDF — malware analysis report

Static analysis result for SHA-256 680454b113a0c37d…

MALICIOUS

PDF

71.5 KB Created: 2020-12-02 18:20:31 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-02
MD5: d5582e2369ffc1b73684f8ee6adf6bf2 SHA-1: 0fe474fc05ad8e95a30f91ff7504167f3ef4fb9b SHA-256: 680454b113a0c37d9568d8a1853fbb61cc7dd0df39cb0ba2b82d46c1299e9489
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://trafficel.ru/strik?utm_term=joe+west+actor+broadway PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4460477/normal_5fab295e1b47d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4368997/normal_5fb2b972bd881.pdfIn PDF document text
    • https://romagazep.weebly.com/uploads/1/3/4/7/134759296/9842115.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366375/normal_5f94c431850f5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447916/normal_5fbedfd7c365b.pdfIn PDF document text
    • https://puliwive.weebly.com/uploads/1/3/4/6/134660228/goded.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4496605/normal_5fb355d93b46e.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/8dfdddfe-db82-44d2-b0a9-db477de4e919/uf_baseball_field_address.pdfIn PDF document text
    • https://s3.amazonaws.com/jagux/33190619162.pdfIn PDF document text
    • https://s3.amazonaws.com/sigobija/39203009003.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fc2e067a13a450bab010c7c/t/5fc64e26145a8629dc884115/1606831654446/cthulhu_tattoo_ideas.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/4cd10c3c-2027-4353-88c4-1666f5d66c18/tevamefadovi.pdfIn PDF document text
    • https://static1.squarespace.com/static/5fbce344be7cfc36344e8aaf/t/5fbd12507dd1bd0a7624d7cb/1606226514905/louisa_county_high_school.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_off0000da31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDA31 5224 bytes
SHA-256: 2b102f152f672d8c05da2db258eda2fa75a30b01e9f2e92d4200460197e79ec3
font_01_sfnt_off0000ec1a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEC1A 11032 bytes
SHA-256: d48c1c4c139294719e86360e75aa2fc49f2d5374515e996faea84d04cac03331