Malicious PDF — malware analysis report

Static analysis result for SHA-256 1008c1244cae0eb3…

MALICIOUS

PDF

50.6 KB Created: 2020-11-07 14:03:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ef7baac948fdfde2fc2693871fa32ed8 SHA-1: 52c628b2bf960afbca76781e15d0bfa0a8c786a9 SHA-256: 1008c1244cae0eb326b4a4fd8a779a51d578ac677ea13f7b66b62d2cb82575ca
96 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains a large number of embedded external links, as indicated by the PDF_SEO_LINK_FARM heuristic. One of the primary URLs found is 'https://traffnew.ru/123?keyword=geometry+dash+3d+icon+kit'. The ML classifier strongly flagged this PDF as malicious, suggesting it's part of a link farm or SEO manipulation scheme designed to redirect users to potentially harmful content.

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=geometry+dash+3d+icon+kit
    • https://kaxokotul.weebly.com/uploads/1/3/4/3/134380066/kosojixopesike_dibezuzobefo_wikorojuremek_funexixos.pdf
    • https://lotagixowila.weebly.com/uploads/1/3/1/1/131164100/0bced5e92f7688.pdf
    • https://wajiresejepo.weebly.com/uploads/1/3/0/7/130774962/sutagu.pdf
    • https://cdn-cms.f-static.net/uploads/4367622/normal_5f9f8c0b27d86.pdf
    • https://cdn-cms.f-static.net/uploads/4369907/normal_5fa3a11ce855a.pdf
    • https://didemutigejibal.weebly.com/uploads/1/3/4/4/134400923/48cb9dc6df1b.pdf
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/komijatolejon.pdf
    • https://cdn-cms.f-static.net/uploads/4369318/normal_5f9123144b582.pdf
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f8970550c361.pdf
    • https://cdn-cms.f-static.net/uploads/4445749/normal_5fa00e16466af.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/5f9c4b72-8d14-4da6-8d72-9d7588ca1620/subojutibirubumutegen.pdf
    • https://uploads.strikinglycdn.com/files/429a9303-c234-42a4-821d-3905f0fe4df7/rolemo.pdf
    • https://s3.amazonaws.com/nisoxow/appro_mod_apk.pdf
    • https://uploads.strikinglycdn.com/files/2208df4a-78e6-4f4e-9503-1bafebc47fc7/22018211653.pdf
    • https://uploads.strikinglycdn.com/files/4fe01ebc-e6a6-45c1-a1eb-207bc5329528/guitarra_facil.pdf
    • https://s3.amazonaws.com/wepeliniru/introduction_to_python_data_science.pdf
    • https://uploads.strikinglycdn.com/files/46a66e54-caf0-410d-84e7-7567588237c0/26200516302.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006f9b.bin
9be9863a35a5a326f69d5277eb5082c999e8cc27d48b0edcfb4ad1ac7b0dcf34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9B 5296 bytes
font_01_sfnt_off00008177.bin
cf50d13c5c21d2e34fba0d9dd21119d4839fc35fdaebfe62cbacf51850cc328d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8177 1936 bytes
font_02_sfnt_off00008ab6.bin
54a07f0cba392b0ae7670b306d15ea328e2b0f1a01aba3fc5db38a267abe3fa1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8AB6 10760 bytes
font_03_sfnt_off0000af01.bin
0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF01 4324 bytes

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