Malicious PDF — malware analysis report

Static analysis result for SHA-256 325aa61733869526…

MALICIOUS

PDF

87.8 KB Created: 2021-03-24 12:47:17 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4fc41940c6fe8f9f1dea4991fead5a06 SHA-1: 58231e867ef2696ca353fb341d45a4c9711527dc SHA-256: 325aa61733869526db5fb400430d719ba92a019c93287d883884d6ae4c6167a7
96 Risk Score

Malware Insights

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

The file is identified as a malicious PDF by multiple heuristics and a machine learning classifier. It contains an embedded URI pointing to a suspicious domain, likely a phishing lure. The document body is heavily obfuscated, but the presence of external URIs suggests an attempt to redirect the user to a malicious website for credential harvesting or further exploitation.

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://kuzutuzo.ru/award?keyword=aparato+locomotor+pasivo+pdf
    • http://vabetovopux.66ghz.com/letter_of_application_for_employment_template.pdf
    • http://kawolamekepe.22web.org/backbencher_songs_free.pdf
    • https://cdn.sqhk.co/sewadokoka/j3f7bjc/76959498118.pdf
    • http://zereteleriw.getenjoyment.net/nitemavivupodojelegefa.pdf
    • http://ladirojenovezoj.mygamesonline.org/rofoni.pdf
    • https://cdn.sqhk.co/zurefaxenov/cjahcF2/how_to_get_cars_in_gta_5_online.pdf
    • http://rorezorejadij.iblogger.org/27390225060.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://uploads.strikinglycdn.com/files/dffce89c-8527-41cd-a4f9-6388ba8ef1da/do_i_need_to_reset_thermostat_after_changing_batteries.pdf
    • http://depuniwawugupi.epizy.com/mavelobinumiwimigi.pdf
    • http://nujovelu.rf.gd/pioneer_deh-80prs_vs_kenwood_kdc-bt92sd.pdf
    • http://wenulusevikofa.myartsonline.com/vudorajivezodojowabefe.pdf
    • http://xemubekimivimed.epizy.com/bexujorodegaso.pdf
    • http://bimagox.rf.gd/joxivesofokefatezunupavas.pdf
    • https://uploads.strikinglycdn.com/files/c472f43c-3beb-4fac-8d31-6f31879b86ee/53450652102.pdf
    • https://uploads.strikinglycdn.com/files/afae1578-4e56-48ab-9c1a-1de010b4f101/depovitafaruwebetuvoji.pdf
    • http://ruludamena.epizy.com/jemabubanusivudoj.pdf
    • http://pikegasek.epizy.com/british_passport_application_form_c1.pdf
    • https://uploads.strikinglycdn.com/files/3bf632b5-43dd-4935-ada2-d2bd2b6b7f45/94614819151.pdf
    • https://uploads.strikinglycdn.com/files/e4b2fa0b-df16-4298-8655-de2515f57a35/93948722635.pdf
    • https://uploads.strikinglycdn.com/files/889fa6ec-41f2-4a5a-a886-883798355fcd/miller_bobcat_225g_service_manual.pdf
    • http://suwulinivez.rf.gd/letobowutivireseweb.pdf
    • https://uploads.strikinglycdn.com/files/28748319-fddd-4905-ac8a-160e1613a8e8/kavivipenexigokovudo.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_off000118c9.bin
01bf293b4ddaf9eac04a0b873214192540020baa6ef356eab64ab534e61440fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x118C9 5352 bytes
font_01_sfnt_off00012aef.bin
961d4ca4e500ab0793270d229196f757a2e231688a2f6a9d2fb9978210a3584d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x12AEF 11544 bytes

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