Malicious PDF — malware analysis report

Static analysis result for SHA-256 e61d14377835a41e…

MALICIOUS

PDF

87.9 KB Created: 2021-04-01 20:16:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-07-10
MD5: 0d93ba386e4a97859e582e5a913d68c4 SHA-1: e48e68e739ff359e7473a1cbab8806590aad15d7 SHA-256: e61d14377835a41e8960291a593b1f9e48597bde9b73e88a43d242ec977227d5
156 Risk Score

Malware Insights

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

The PDF contains a high number of external links, many of which are to benign-looking PDF files, suggesting a link farm or redirection to a malicious site. The primary malicious URL identified is xezojetit.ru, which is likely used for phishing or to host a secondary payload. The ClamAV detection and ML classifier strongly indicate malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9983

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://xezojetit.ru/123?utm_term=acordes+de+guitarra+acustica+canciones+faciles+pdf PDF link annotation
    • https://cdn.sqhk.co/serodozire/WKkrXgh/97362280445.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393036/normal_60208c0e23238.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4460954/normal_5fca2fce45859.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4413469/normal_5ffbf00f40833.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4413578/normal_6056b0d94842a.pdfIn PDF document text
    • https://cdn.sqhk.co/bigokukanuf/dAgdfih/54928296450.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4447465/normal_5fe63650f005e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4419191/normal_6050795c9d812.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4367927/normal_6015f31d2db9c.pdfIn PDF document text
    • https://cdn.sqhk.co/susojitigi/0O3rq43/discord_server_stats_bot_code.pdfIn PDF document text
    • https://cdn.sqhk.co/setawigiz/3WWhPie/57576358064.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://d1897088-ef6e-4b60-8303-910b4b551fc1.filesusr.com/ugd/4cfbbd_148f513dc6d441bbb70b4ad0b0f720c1.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fefurorobumi/pudapevagir.pdfIn PDF document text
    • https://55f5e71c-5f54-469f-9449-301c43944234.filesusr.com/ugd/bbdb65_15662055a7514cb3a90802539b7403e5.pdf?index=trueIn PDF document text
    • https://a819be37-316e-4347-83bc-b067fb6953c8.filesusr.com/ugd/d5662a_62840105e08044dd86ef4a52e6f74ac5.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/fedojigudaj/17720000941.pdfIn PDF document text
    • https://8e12fe21-47c1-448c-af9e-883e7c84523b.filesusr.com/ugd/52ac5e_b82f8cb2f5c34eae83f1d1d1bf512d69.pdf?index=trueIn PDF document text
    • https://4dd4a32c-aced-41d2-87e6-7ff9ca8080d7.filesusr.com/ugd/6d6f33_307d68a7588d4b7889a653da34589c35.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xajowu/ford_555_backhoe_parts.pdfIn PDF document text
    • https://30f21d72-2b41-4965-a7bc-2abb02bf1ded.filesusr.com/ugd/47e66e_ab3f4d4744e147929eeb52eae1fdc8ff.pdf?index=trueIn PDF document text
    • https://1160a196-6e18-49bd-931c-438029629b47.filesusr.com/ugd/40338c_91960310626741b9a4fa3b4792ad2fa7.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/nawosineromigi/warusimonaraj.pdfIn PDF document text
    • https://s3.amazonaws.com/mavixu/array_concept_in_java.pdfIn PDF document text
    • https://748e6e98-33e2-4bd1-95aa-01ea3505a154.filesusr.com/ugd/704f6c_920c5ba891034df1b5ab39789a8b8912.pdf?index=trueIn 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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000fda3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFDA3 5196 bytes
SHA-256: 43a5120bf2887c4ef64b951dfcc7d4648cad13da10ddd854fcad857459e140e0
font_01_sfnt_off00010f51.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10F51 1888 bytes
SHA-256: 7ef6cb6698fea806eec66effba9ae77859a8e18c03169e66e212b1421c87ab72
font_02_sfnt_off00011864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11864 13016 bytes
SHA-256: c1b17d76b9ff920642f91ac948db436371e0b9814a25dc1dfdfb79e9dd1e8c43
font_03_sfnt_off000142f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x142F5 4324 bytes
SHA-256: ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3