Malicious PDF — malware analysis report

Static analysis result for SHA-256 e2bedcb78d9ec361…

MALICIOUS

PDF

75.8 KB Created: 2021-04-03 01:41:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5cbff6f2ec350d84e7f81b635bef01b1 SHA-1: d94e3280da680a496b6e493751bcd88cac6fc16b SHA-256: e2bedcb78d9ec361970a2a15da496bf9c3d2e9df17cdfa3d834d629197256dfc
96 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. It contains an embedded URL pointing to 'nipisod.ru', which is likely part of a phishing or malware distribution scheme. The presence of PDF_URI and EMBEDDED_URL heuristics further supports this, suggesting the document's primary purpose is to redirect users to a potentially harmful external resource.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • 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://nipisod.ru/123?utm_term=javascript+date+format+dd-+mm-+yyyy
    • http://dipunag.getenjoyment.net/ableitungsregeln_e_funktion.pdf
    • http://kazimibi.getenjoyment.net/pujewagonenogofogoweru.pdf
    • https://cdn-cms.f-static.net/uploads/4369797/normal_602da57e9cd70.pdf
    • http://fisujerekuvij.getenjoyment.net/wusula.pdf
    • http://xelowonol.scienceontheweb.net/80338425430.pdf
    • https://cdn-cms.f-static.net/uploads/4476930/normal_6030df3a90946.pdf
    • https://cdn-cms.f-static.net/uploads/4487201/normal_6052d1b2b166a.pdf
    • https://static.s123-cdn-static.com/uploads/4376374/normal_5fe3df96af9b6.pdf
    • https://static.s123-cdn-static.com/uploads/4403118/normal_5fe163a80ce1a.pdf
    • https://static.s123-cdn-static.com/uploads/4422914/normal_5ffe6e01d0e79.pdf
    • http://wuramegojuluz.mywebcommunity.org/41791628199.pdf
    • https://static.s123-cdn-static.com/uploads/4484115/normal_5ffbd33566315.pdf
    • http://damewonuseba.sportsontheweb.net/52980904896.pdf
    • http://bisibometixo.mywebcommunity.org/the_one_real_thing_espaol.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://4bbf79d8-97e4-42de-9a75-948158c354f0.filesusr.com/ugd/52f5d3_ddc26dec1f3a48fb8e3bcebc177ab07f.pdf?index=true
    • https://67bb8873-ca08-4da4-87c0-60a8072ebff6.filesusr.com/ugd/a838c0_2bda4e697a6c41249b1f9cc9fe7d2900.pdf?index=true
    • https://uploads.strikinglycdn.com/files/07e14ea0-7b45-43a9-b7a1-b6e515ebc893/20072671304.pdf
    • https://507d1b22-ea03-4061-a262-f79425337ca2.filesusr.com/ugd/a374b9_f6bf4eb1bd2d4207805128f30052be4a.pdf?index=true
    • https://uploads.strikinglycdn.com/files/b4cf3dbb-ef39-4852-ab8e-79f5b4ecf0ff/different_types_of_psychological_tests.pdf
    • https://uploads.strikinglycdn.com/files/05015810-4922-46f3-acc3-504c38e71bf3/taxeto.pdf
    • https://uploads.strikinglycdn.com/files/ea8f2de2-0574-4b20-ae25-80943b08234b/sinizajakipapojemu.pdf
    • http://beliraguw.onlinewebshop.net/71424993786.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e535.bin
d9882a3003226d02a25e8be002833dc68c1d24a47f6362bface36f0a3f81dce8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE535 5452 bytes
font_01_sfnt_off0000f7c9.bin
f278139ed780ead789d3e2904a128c64a1705b5731177ff127694047289c9eb6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF7C9 13124 bytes

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