Malicious PDF — malware analysis report

Static analysis result for SHA-256 8df454d488f0fd81…

MALICIOUS

PDF

87.3 KB Created: 2021-04-05 00:46:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc19df676f8853a4c5c853cacd3ca72 SHA-1: 7a6cbc6193400ed330a4039fed445f5b41519353 SHA-256: 8df454d488f0fd812b87553641c5177851685094799015c74db460f47e314926
96 Risk Score

Malware Insights

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

The file was detected as malicious by ML classifiers and ClamAV, indicating a high likelihood of malicious intent. The presence of an embedded external URI pointing to 'midufefew.ru' suggests a phishing or malware distribution attempt. Although no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a malicious document designed to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

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://midufefew.ru/aws?utm_term=hoover+max+extract+77+leaking
    • https://nirefuriwubava.weebly.com/uploads/1/3/1/6/131637308/9a858.pdf
    • https://memuvarava.weebly.com/uploads/1/3/1/3/131384606/laxuluw.pdf
    • https://ragurinibobuma.weebly.com/uploads/1/3/3/9/133986244/kezetunob.pdf
    • https://static.s123-cdn-static.com/uploads/4416136/normal_5fc924e7cc792.pdf
    • http://reniloze.iblogger.org/how_much_does_it_cost_to_retake_the_gre_test.pdf
    • https://cdn-cms.f-static.net/uploads/4454281/normal_600fb887dfec0.pdf
    • https://cdn-cms.f-static.net/uploads/4376619/normal_60315c45bb78e.pdf
    • https://cdn.sqhk.co/damukowabij/Jhbjj1c/92102765244.pdf
    • https://lerozezowigex.weebly.com/uploads/1/3/0/7/130776164/bimisub.pdf
    • https://cdn-cms.f-static.net/uploads/4423429/normal_6039cdbe5dfeb.pdf
    • https://cdn-cms.f-static.net/uploads/4371025/normal_604ad1f3bb079.pdf
    • https://cdn.sqhk.co/gotuxixovumu/giigidZ/camera_studio_near_me.pdf
    • https://cdn-cms.f-static.net/uploads/4403130/normal_602f1a4e45548.pdf
    • https://cdn.sqhk.co/febowozefu/fKJKicx/simple_keyboard_songs_with_letters.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/guwutivupudutu/97339519979.pdf
    • https://s3.amazonaws.com/desenaz/71678400204.pdf
    • http://bobakazof.epizy.com/6th_grade_science_worksheets_printable_free.pdf
    • https://s3.amazonaws.com/vufuzewasi/sugar_test_list.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000f805.bin
a6eb8b107b599b5b3c995d5f12cb4e17e034cc33dd4af313e03147442f0e4765		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF805 5176 bytes
font_01_sfnt_off0001098b.bin
9af1eb27f9d8dfa4f83b029cdb8bfe8178cf446915447779eea5293a55b476da		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1098B 2460 bytes
font_02_sfnt_off0001145e.bin
f720f6ed98daf16547ffc490e3b2db4225985c941e628db10e0ba4fb8f563c8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1145E 11372 bytes
font_03_sfnt_off00013b4d.bin
354dce64f07f3d7acdf6a04edf763950ffbfec4edcbb4bfe17b65a83544077bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B4D 16036 bytes

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