Malicious PDF — malware analysis report

Static analysis result for SHA-256 9c55c46ee97a754d…

MALICIOUS

PDF

75.7 KB Created: 2021-05-05 19:57:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 5d31d234daf3f861fe8cc44debd7c10e SHA-1: 652b135bc402a36e0e6df7184853547c077ad347 SHA-256: 9c55c46ee97a754d144008cf278120443bd6a6753f0a5f88aaf330555dcdfa4f
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. The document body, though heavily obfuscated, contains references to downloading software, and the presence of numerous embedded URLs suggests an attempt to redirect the user to malicious sites. The ML_NYX_PDF_MALICIOUS heuristic and ClamAV detection strongly indicate malicious intent, likely to deliver a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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 http://firstdoctor.xyz/acer_aspire_one_zg5_battery_repairkxnnb.pdf In PDF document text
    • http://dupuladusudired.mypressonline.com/whats_in_a_pond_ecosystem.pdfIn PDF document text
    • https://cdn.sqhk.co/molipigi/EhqWjcn/sazoxiro.pdfIn PDF document text
    • http://my-favshopd.online/yamaha_hs8_subwoofer_for_sale30ks1.pdfIn PDF document text
    • http://com-servers.online/2398668086ql68w.pdfIn PDF document text
    • http://okstore.info/muropanikofetae9yvm.pdfIn PDF document text
    • http://vibolofisef.mywebcommunity.org/burket_s_oral_medicine_11th_edition_free_download.pdfIn PDF document text
    • http://dotenipago.medianewsonline.com/1482999246.pdfIn PDF document text
    • http://mrshadow.net/girorojununubolikclizp.pdfIn PDF document text
    • https://cdn.sqhk.co/vifekodilevi/geOghH3/17931122352.pdfIn PDF document text
    • http://milanomoda-italy.site/xitevixaxivituwikuralj9d9b.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://feedproxy.google.com/~r/wb/ENAH/~3/dRGGkpkNhSI/wb?keyword=download%20minecraft%20pc%20windows%2010%20free%20full%20versionPDF link annotation
    • http://nodikisiti.rf.gd/audit_assurance_textbook.pdfIn PDF document text
    • http://pulijivugis.epizy.com/watermark_free_editor.pdfIn PDF document text
    • http://lazuletezofik.onlinewebshop.net/garmin_nvi_1490_update.pdfIn PDF document text
    • https://s3.amazonaws.com/gogunabones/old_album_songs_malayalam.pdfIn PDF document text
    • https://s3.amazonaws.com/webipejonavuv/2017_mini_cooper_s_brake_pad_reset.pdfIn PDF document text
    • https://s3.amazonaws.com/jeduzizonox/physical_android_17_dokkan.pdfIn PDF document text
    • https://s3.amazonaws.com/zidenigad/final_divorce_decree_texas_template.pdfIn PDF document text
    • http://darozux.epizy.com/como_es_el_lider_carismatico.pdfIn PDF document text
    • https://s3.amazonaws.com/muxozuvalubi/online_video_er_from_facebook_link.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e95b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE95B 5644 bytes
SHA-256: 22be4229f75fca3d2739ceef62cab707a0594c6142677b1579dd5d1fa7cd32d1
font_01_sfnt_off0000fca1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFCA1 10828 bytes
SHA-256: e6419422b9f46386ce641b90caf65d0df3429dc4fa8c164efbe38a7918dc91d9

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