Malicious PDF — malware analysis report

Static analysis result for SHA-256 282e42dc97d25455…

MALICIOUS

PDF

37.3 KB Created: 2020-11-05 18:41:24 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-04
MD5: ee46c14ba865f64a43131f6be1223c88 SHA-1: 24884f3d1fd66c3ad80a14840c6044e5e3576553 SHA-256: 282e42dc97d25455939838839663c296e9c5bb3aaeb82650ac183e745572d019
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://trafficel.ru/aws?keyword=balloons+tower+of+defense+5+unblocked+hacked PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4379626/normal_5f8aa5eb09bea.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4369160/normal_5f991d453808b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409255/normal_5f9a83acbe86f.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403936/normal_5f9e073d554ee.pdfIn PDF document text
    • https://kuvinonufero.weebly.com/uploads/1/3/4/3/134307364/8265443.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/82b4ddc6-c97a-4e39-a3be-3b63c453a9cc/bowuviretigikoko.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/9e68cbcb-cf8b-49aa-85e1-37c185cb9b59/cheat_codes_for_grand_theft_auto_liberty_city_xbox_360_jetpack.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/30e5f492-873a-4066-a54c-9f3bd0e64c61/diagrama_de_caso_de_uso_ejemplos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1597/6613/files/how_to_make_a_spear_head_out_of_rock.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/34495f96-53c9-488f-8cca-525152847f14/david_batchelor_chromophobia.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2a6d0f59-977f-45ed-9799-9601f5ad8804/jekuwidi.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_off000050fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50FB 5580 bytes
SHA-256: 2602aff5d254890d62c18b3fa3dab3ec85f9137213f30a9dfc09b7d96d512401
font_01_sfnt_off00006409.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6409 10996 bytes
SHA-256: 0786ad015af72a9d77d78ae2f178fc6b8186b7ea587e0878f9abc43face1900d