Malicious PDF — malware analysis report

Static analysis result for SHA-256 a49bfa959c9b04b3…

MALICIOUS

PDF

73.6 KB Created: 2021-03-23 03:02:43 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 262d634db67a0d99ea4a63aabf17732b SHA-1: 7246bf1294da6e7c5582a81fa34a7843179ee81a SHA-256: a49bfa959c9b04b371453d18fef2b4161abf4ef7dfa2ce6b5acbbc9ed314d4b2
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, which is a strong indicator of malicious intent. The ML classifier and ClamAV detection further support this assessment. Although the document body is heavily obfuscated, the presence of the external URI suggests a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://ponafet.ru/wix?keyword=osrs+kbd+solo+range+guide
    • https://cdn-cms.f-static.net/uploads/4372382/normal_601aae6ef2404.pdf
    • http://wukifiduputafeb.22web.org/mekunudefewazux.pdf
    • http://zuxegizo.iblogger.org/anabolisme_dan_katabolisme.pdf
    • http://kirademom.22web.org/how_to_roman_numerals_work.pdf
    • http://pisumuvate.sportsontheweb.net/hypertensive_heart_disease.pdf
    • http://gazagubef.22web.org/introduction_to_ai_and_machine_learning.pdf
    • https://cdn-cms.f-static.net/uploads/4413467/normal_600dd19873686.pdf
    • http://bumasujofoj.getenjoyment.net/operations_management_jobs_columbus_ohio.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://dixaxag.rf.gd/bavilekanarimifusuvapu.pdf
    • http://xasigidokax.rf.gd/assinar_com_certificado_digital.pdf
    • http://zukewanika.rf.gd/gipusegadabesu.pdf
    • http://marivugedada.epizy.com/mantu_chhuria_song_my_love_video.pdf
    • http://sojidalome.rf.gd/53375989998.pdf
    • http://bibuzijuta.epizy.com/85605011042.pdf
    • http://meraxemuvixise.epizy.com/odisha_song_free.pdf
    • http://zodejudefafu.epizy.com/how_much_is_my_poster_worth.pdf
    • http://duwujedop.rf.gd/tricks_for_memorizing_organic_chemistry_reactions.pdf
    • http://xavisijividefo.epizy.com/30775588939.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_off0000e4ce.bin
44414defe2829565a1a6138f2e14c4409852c1ee1ea28fb0dbd5587464d13d6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE4CE 5224 bytes
font_01_sfnt_off0000f69b.bin
7ddfbc7b271cc9b8ab08409797da226f41ad1cad73f9d802f7daf33486f42339		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF69B 10240 bytes

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