Malicious PDF — malware analysis report

Static analysis result for SHA-256 daf9e75119552b95…

MALICIOUS

PDF

32.9 KB Created: 2020-11-06 12:50:28 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 29d5d8a57f246af88366df2e582d51c9 SHA-1: d9f10c6b8d8f8e54422c4fc97a9a74209c059f57 SHA-256: daf9e75119552b9516838a99fc92b1e957574317dd76021450c72af1326da927
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://trafffi.ru/aws?keyword=evergreen+forest+products+new+meadows+idaho PDF link annotation
    • https://venifamu.weebly.com/uploads/1/3/4/5/134501621/6106570.pdfIn PDF document text
    • https://kiseridebajesa.weebly.com/uploads/1/3/1/4/131408791/sipasolekudozovuxib.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4392472/normal_5f9de812a5ea4.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4384464/normal_5f9c5372ae9d0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379385/normal_5f918ae29aa20.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365541/normal_5f871d4bf2612.pdfIn PDF document text
    • https://mamexobupelo.weebly.com/uploads/1/3/1/3/131383482/guwakajuwugokatodot.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/ab10304a-4569-4656-bf1b-a77ff30c72ee/4100450677.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/b8aaa4ab-6a66-49b2-836b-127a5755a2a9/zeterij.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edbf0359-e164-43be-8f1e-28de4660cf90/joann_fabrics_return_policy.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c50ad75a-f81b-4cdb-a121-d62dee042bc9/pulovilidosu.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_off00004224.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4224 5648 bytes
SHA-256: 4caa9fef07fc5426dbece6ef05bb13168b4a3a3e7a82ba1b0d5a32aad3320d93
font_01_sfnt_off00005550.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5550 9828 bytes
SHA-256: f7db8e7cf7ac0af02560e6b4bfa30c7d82a2315f842d64059dbb4ad919350270