Malicious PDF — malware analysis report

Static analysis result for SHA-256 cb0ead7508011c15…

MALICIOUS

PDF

75.6 KB Created: 2021-03-30 05:56:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b321a0372cba25958ad64ad250d3340d SHA-1: 9abfa1f2bc119305bc3c65bd0896ce411fe4b5c2 SHA-256: cb0ead7508011c15ab5edcd41bf5af857b4ccaa08f6035ce453cf1e6ad09752e
96 Risk Score

Malware Insights

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

The PDF file was flagged by ClamAV as Pdf.Phishing.Trojan and a machine learning classifier indicated a high probability of maliciousness. The document body, though heavily obfuscated, contains references to 'swamp attack hacked apk' and an external URL, suggesting a phishing attempt to trick users into downloading malicious Android application packages. No scripts were extracted, but the presence of an external URI points to a download or redirection mechanism.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://druttle.ru/wix?keyword=swamp+attack+hacked+apk
    • http://xofajenakimexo.iblogger.org/77357537055.pdf
    • https://cdn.sqhk.co/vedasukuki/FEJ56gd/58936920144.pdf
    • http://zasasibibo.iblogger.org/35479467590.pdf
    • https://cdn.sqhk.co/wosipuvetot/OFshFjd/85465886931.pdf
    • http://nepifumawal.22web.org/como_convertir_de_a_word_editable.pdf
    • http://duvufiselepeb.22web.org/architects_in_delhi.pdf
    • https://zunezazawegor.weebly.com/uploads/1/3/4/6/134665047/benunotokag.pdf
    • https://rovemijiv.weebly.com/uploads/1/3/4/3/134343091/wagapiz.pdf
    • https://cdn.sqhk.co/figegixo/uHsgeIh/zabezijulusowumajojoded.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wufutogaj.epizy.com/happy_birthday_wishes_for_sister_gif.pdf
    • http://duguzikazom.rf.gd/40450976792.pdf
    • http://xubufusizosawud.epizy.com/asterix_the_gaul.pdf
    • https://9764c975-acb6-4bd5-a3ff-b1f4624bc9bc.filesusr.com/ugd/5bcb7b_d9fb077d30004f6494bb69102974a9bf.pdf?index=true
    • https://a0a5ada1-270c-452f-b092-d943fc6f0dc0.filesusr.com/ugd/306762_d55067cbd9484d51b5dd12b6ca9efee2.pdf?index=true
    • https://2e81f42f-67f9-46a9-89e2-a5f3ab3b03ee.filesusr.com/ugd/f138f5_b11de7dc101d47b0bc519158be4422a4.pdf?index=true
    • https://uploads.strikinglycdn.com/files/82f931df-bbec-4054-9ab3-389471ab0248/how_to_build_a_home_office_in_the_garden.pdf
    • https://c8019651-2137-4367-b38e-775fff3f8a75.filesusr.com/ugd/fc5a02_a92660ac255842b9979eb71b45efa241.pdf?index=true
    • http://vudunebavibag.epizy.com/zafomusadugovepire.pdf
    • https://uploads.strikinglycdn.com/files/724388b4-f39f-4b70-9ba9-bd4b569c39ea/hieroglyphic_dictionary.pdf
    • https://47e244ab-6b1f-4ae7-97e8-86de5b619f9f.filesusr.com/ugd/e1d12c_b40df81ed4f54faaabcdb52940772d39.pdf?index=true
    • 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_off0000ea2a.bin
4c80ab2c90aa158d13fd512b328b7ea0f0053cfde70efc6dbc3c82ffb97ca7c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEA2A 5268 bytes
font_01_sfnt_off0000fc05.bin
0eba84a2d2f73faa97c133b24f6470a597a3db5152c4e22c9a73d15bb2b78d3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFC05 10820 bytes

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