Malicious PDF — malware analysis report

Static analysis result for SHA-256 285c2e9af1faf4b3…

MALICIOUS

PDF

40.2 KB Created: 2020-11-07 21:41:06 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-07
MD5: a667384f1234f561d15f8c25096fab98 SHA-1: 8e82f07faa0e7e99e97dc9cea89752a856ea47de SHA-256: 285c2e9af1faf4b38582332b1cd3d38b20e05fe3f1397b6bad31bf4a48684e70
96 Risk Score

Malware Insights

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

The PDF document contains numerous external links, masquerading as a download for a 'random pokemon team generator gba download'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external links, suggesting a link farm or redirection scheme. The ML classifier also flagged this PDF as malicious with high confidence. The embedded links likely lead to malicious content or further infection vectors.

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/aws?keyword=random+pokemon+team+generator+gba+download PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4366365/normal_5f8d26a1365cd.pdfIn PDF document text
    • https://winomumamo.weebly.com/uploads/1/3/1/0/131070375/pimipupitof_rotomu_zewunitepenupox_kegesirupazipam.pdfIn PDF document text
    • https://jinokafolamod.weebly.com/uploads/1/3/4/3/134310646/xisitiganavefo.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372740/normal_5f9607fb20988.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4381973/normal_5f8ef6e36d500.pdfIn PDF document text
    • https://kokexofagisukop.weebly.com/uploads/1/3/2/7/132710589/662f88ddd5cf.pdfIn PDF document text
    • https://xanodupujariris.weebly.com/uploads/1/3/0/9/130969381/muresajuvarukepu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408594/normal_5f9ae7aa3e00d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4383579/normal_5f9289ea391f4.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/bejenosugede/zotiviranudidemu.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_off00005c09.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C09 5404 bytes
SHA-256: 563d0dc7cc7033700864e51f4fce2a218676f006cfcfd1a6a8f564302dd7304c
font_01_sfnt_off00006e67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E67 11176 bytes
SHA-256: 4fc1898fda7192c727ccf97c8ffb2df3053fbac7e10a3a012044357d8798af54