Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9c84068c2e661a8…

MALICIOUS

PDF

75.2 KB Created: 2021-03-22 07:10:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4c3af0cbe54f6757a42589fc36e36549 SHA-1: de4845cb6ffb06caf0bf7e1fddbbde355cf643c8 SHA-256: c9c84068c2e661a827957b0dc0c7155fa093081e88e973c8cc69d70b557106f4
96 Risk Score

Malware Insights

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

The PDF document contains a question designed to trick the user into clicking an external URL. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware distribution. No scripts were extracted, but the embedded URL is the primary indicator of compromise.

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://kuzutuzo.ru/strik?utm_term=which+of+the+following+is+classified+as+a+plant+asset
    • http://xokezuwadem.mygamesonline.org/principio_da_autonomia_titulos_de_credito_jurisprudencia.pdf
    • http://rajukilodagoje.mygamesonline.org/fimolerite.pdf
    • http://muzibatixabu.mypressonline.com/niv_study_bible_leather_engraved.pdf
    • http://kojazunupetip.mygamesonline.org/where_is_the_sim_card_on_my_motorola_droid_phone.pdf
    • http://xiwakaravivomik.scienceontheweb.net/nausea_sartre_english.pdf
    • http://timinome.getenjoyment.net/xoxun.pdf
    • https://sotalopi.weebly.com/uploads/1/3/4/3/134345355/jimugabekonarapisa.pdf
    • http://gosoxegekiri.mywebcommunity.org/diaper_genie_expressions.pdf
    • https://cdn-cms.f-static.net/uploads/4416322/normal_602ce5116b5a1.pdf
    • http://xorabawik.medianewsonline.com/fsc_biology_book_1_chapter_11.pdf
    • http://nitapida.mywebcommunity.org/attahiyat_surah_in_telugu.pdf
    • https://wewofubajibopa.weebly.com/uploads/1/3/1/3/131381003/dexuzaxivep_kudaronux_judekalopas_mibutivemem.pdf
    • http://jaxixojuko.mypressonline.com/82985410194.pdf
    • http://gelokan.sportsontheweb.net/netovunudinitifod.pdf
    • http://mozejewij.iblogger.org/15117586875.pdf
    • http://nokilibetajew.mywebcommunity.org/afl_fixture_2020_a4_printable.pdf
    • https://cdn-cms.f-static.net/uploads/4377662/normal_602580530581d.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://wupidusujimi.myartsonline.com/meaning_of_structural_adjustment_programme.pdf
    • http://revosikokupefar.rf.gd/butexagapow.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_off0000e7ff.bin
530ca13b756a2d0a94b52038a7db98dd01309d7947df63236cdbe2bc38202412		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7FF 5428 bytes
font_01_sfnt_off0000fa9d.bin
d71b7079dcb1e73b7d818ffd920a9f166ed3a6cd2839a70c2fde7354eda38007		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFA9D 10684 bytes

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