Malicious PDF — malware analysis report

Static analysis result for SHA-256 e073d0155ea0ba07…

MALICIOUS

PDF

42.7 KB Created: 2020-11-09 14:18:13 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: bf5627f2cf4dd953ffdf6e97d63bf58c SHA-1: d4e2b3d9c3dad6cb8a6a3f8a8bf95505e7cd30c8 SHA-256: e073d0155ea0ba07e2c85bbf23d8372395d22ecb00abd666df9a827a0c932743
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 1.0000

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://traffnew.ru/123?keyword=solar+system+rap+storybots PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4381766/normal_5f94a1d888b43.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4401558/normal_5f9768d13c297.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4390350/normal_5f8ff2370822b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367617/normal_5f9c90e273720.pdfIn PDF document text
    • https://mapipuluzobeb.weebly.com/uploads/1/3/1/3/131398440/6054624.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4488090/normal_5fa919ab1d026.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4462341/normal_5fa5a8d3681a3.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370561/normal_5f99e85c0d8ca.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/nepawigexa/95720122104.pdfIn PDF document text
    • https://s3.amazonaws.com/zunaduxa/la_llorona_song_angela_aguilar.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e5a37cf1-fec9-43d5-916d-5bb83270108d/plymouth_brockton_bus_schedule_hyannis.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/53346ce1-e7ad-4a33-9fb6-f5846cd4fe47/gufixu.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_off000069a2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69A2 5312 bytes
SHA-256: 07332e685d5c3c60fd4a37f403f5bd52a5fa7a054b948334b142ab94cbca5d7a
font_01_sfnt_off00007b9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B9A 10320 bytes
SHA-256: 3a81d230c22abd507e0e19f8c7d47fb064e8491d20109c1d7c547a6dfadb8d67