Malicious PDF — malware analysis report

Static analysis result for SHA-256 a71534a979e10371…

MALICIOUS

PDF

153.6 KB Created: 2021-02-16 08:38:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ef0e955beff08bb19150617693292c91 SHA-1: 51dffe75b9d60f9e5fe4fc3ccf23eaf34cd43019 SHA-256: a71534a979e1037195752c02390cec61a67552f3b7a3f536329d0185ddd1de59
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also flagged this PDF with high confidence. The embedded URL is likely intended to redirect the user to a malicious site for phishing or malware delivery. No scripts were extracted, but the presence of the malicious URL is sufficient evidence for this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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://maypoin.ru/wix?keyword=%25EB%2591%2590%25EA%25B7%25BC%25EB%2591%2590%25EA%25B7%25BC+%25EB%25AC%25B8%25EC%2598%2588%25EB%25B6%2580+%25ED%2595%259C%25EA%25B8%2580 PDF link annotation
    • http://energytik.net/briovarx_osteoarthritis_enrollment_formy1oda.pdfIn PDF document text
    • http://itfamily.info/vivah_full_moviez6m0g.pdfIn PDF document text
    • http://momentshop.website/homemade_wood_arcade_machineslskrg.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/zesixefe/diborurufeninimivunobo.pdfIn PDF document text
    • https://s3.amazonaws.com/nedijowewoded/nasun.pdfIn PDF document text
    • https://s3.amazonaws.com/pesetufavo/nekoteseletodufedom.pdfIn PDF document text
    • https://s3.amazonaws.com/kofabube/10649492298.pdfIn PDF document text
    • https://s3.amazonaws.com/vudivuzakal/novel_cecillia_wang.pdfIn PDF document text
    • https://s3.amazonaws.com/simujix/aligarh_full_movie_300mb.pdfIn PDF document text
    • https://s3.amazonaws.com/numegubowalonan/15885845887.pdfIn PDF document text
    • https://s3.amazonaws.com/vonuxagupeduze/18876594364.pdfIn PDF document text
    • https://s3.amazonaws.com/pizivurapab/fakobadifikadobute.pdfIn PDF document text
    • http://kupaxomuwekag.epizy.com/ppsspp_emulator_for_pc_windows_8._1.pdfIn PDF document text
    • https://s3.amazonaws.com/sobaketemu/cricket_game_for_android_2019.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00014927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x14927 72244 bytes
SHA-256: d36d4d7a82114011812ced8b3d6a720f9ad5e6b60557e8bc1b166eb57f6c11b5
font_01_sfnt_off000203e0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x203E0 3676 bytes
SHA-256: 4b3df7169cd40a7f9ff77f7a0ad812534aa53e10b2a1ef233972b5c8baccbd52
font_02_sfnt_off000210ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x210EA 4068 bytes
SHA-256: 8e72149c7ce3095aec9cecc072f8a515df207c00aebf785f12c4fc197e954f4b
font_03_sfnt_off00021ec9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x21EC9 9972 bytes
SHA-256: 7e69d2a508e92397009ca42d14c8fae56a7a01437a33843740793875489d8ae6
font_04_sfnt_off0002412b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2412B 16092 bytes
SHA-256: 60537e57f7d66c4e94b3fb0873f1cc425ba355ca5982277aa0832b97f6e8bea0

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