Malicious PDF — malware analysis report

Static analysis result for SHA-256 e9befc6cf664f28f…

MALICIOUS

PDF

52.2 KB Created: 2020-11-05 17:13:30 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 954a5b1f7a57dc13dd1f948dd1654759 SHA-1: 98897056a31c09c32732a7e6f0cbffdab6d4b391 SHA-256: e9befc6cf664f28f8da8e25cce7368d8f3f37a92bfeed2624179e4250de551a0
96 Risk Score

Malware Insights

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

This PDF document, generated by wkhtmltopdf, contains a large number of embedded external links. The heuristic 'PDF_SEO_LINK_FARM' indicates a potential link farm, suggesting the document's primary purpose is to redirect users to various external sites, possibly for SEO manipulation or to host malicious content. While no scripts were directly extracted, the presence of numerous URLs and the ML classifier's high confidence score point towards a malicious intent to redirect users.

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://traffking.ru/aws?keyword=sistema+de+navegacion+por+satelite+beidou
    • https://cdn-cms.f-static.net/uploads/4366632/normal_5f883975423d3.pdf
    • https://cdn-cms.f-static.net/uploads/4422909/normal_5f9bc4db56bf3.pdf
    • https://cdn-cms.f-static.net/uploads/4368469/normal_5f94fe303f253.pdf
    • https://cdn-cms.f-static.net/uploads/4375087/normal_5f951f93cd9ce.pdf
    • https://cdn-cms.f-static.net/uploads/4408712/normal_5f9a6602c5751.pdf
    • https://cdn-cms.f-static.net/uploads/4393893/normal_5f95de8ba7703.pdf
    • https://cdn-cms.f-static.net/uploads/4385852/normal_5f8df99a3d6a4.pdf
    • https://lafozevu.weebly.com/uploads/1/3/4/3/134378288/e8f4d187c198865.pdf
    • https://cdn-cms.f-static.net/uploads/4388177/normal_5f9945991fcdf.pdf
    • https://cdn-cms.f-static.net/uploads/4420927/normal_5f9cc2c5c5256.pdf
    • https://cdn-cms.f-static.net/uploads/4423442/normal_5f97ffabbe0a3.pdf
    • https://cdn-cms.f-static.net/uploads/4453103/normal_5fa12faed0ebc.pdf
    • https://zadumeredevasax.weebly.com/uploads/1/3/1/4/131453870/720e82afc.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://uploads.strikinglycdn.com/files/cac62cf0-8ebb-420e-8c1c-b297b20804d4/burulujoduvowukomorudape.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_off00006a8b.bin
a93377a51952a0e893765970449686753a83ef7d65339419e104c450b4663118		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A8B 4660 bytes
font_01_sfnt_off00007abb.bin
159044b03f1a9db1e28c4edcd32fac21acf1e00f650a0636df676d81c980da98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABB 5580 bytes
font_02_sfnt_off00008d8d.bin
7ba4db4c35b4f88c22b36c238c41e2316dfa7ef03c2301ffff347d128df9f5fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8D8D 11660 bytes
font_03_sfnt_off0000b3a5.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A5 4324 bytes

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