Malicious PDF — malware analysis report

Static analysis result for SHA-256 93a6317569cc4b3d…

MALICIOUS

PDF

67.6 KB Created: 2020-11-20 12:41:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 250f195319c8d90b653690c3e3497315 SHA-1: 91b68a394b98ff13eb545172337a2a9fd60d7ccc SHA-256: 93a6317569cc4b3df6652e3d575e4745a5b606eee089637b0ff43f9f8f01d510
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://trafffe.ru/strik?utm_term=senior+class+president+graduation+sp PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4452862/normal_5fa43832db1f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369525/normal_5f8f5166a1ed4.pdfIn PDF document text
    • https://jutawalafomas.weebly.com/uploads/1/3/4/3/134316275/wokidavexotogilan.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367275/normal_5f9278a5e728e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4417807/normal_5f95f9b12f84a.pdfIn PDF document text
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/napotamoboviz_dimunekeluwo_bijesexasudowu_nosufel.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/37b6dc67-8a4e-4c7e-af5d-54fe2f730f48/51664231068.pdfIn PDF document text
    • https://s3.amazonaws.com/tadovu/givogukevupatunozek.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/931d068b-374c-4237-8bdd-6a96449506d3/petivakupirabilopigan.pdfIn PDF document text
    • https://s3.amazonaws.com/somamere/st_john_s_cemetery_queens_ny_visiting_hours.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/03d7a8df-e1cc-473f-af27-dcabf2db9a1d/cosmo_and_wanda_costumes.pdfIn PDF document text
    • https://s3.amazonaws.com/zafaronivaj/channa_mereya_movie_punjabi.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9b93d727-22b6-4b51-a760-e4d68c83fa85/imp_of_the_mind.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_off0000caed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xCAED 5344 bytes
SHA-256: 3ad2da6e47b40aed0e4df29b176f9925244cdd63f187671316fbdf425f69fbd9
font_01_sfnt_off0000dd23.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDD23 10692 bytes
SHA-256: cd03aa2a42ae8da1c3896dac677db3f2c818b2e8308a5881892463ea6f299bf3