Malicious PDF — malware analysis report

Static analysis result for SHA-256 163fcd8352e879f1…

MALICIOUS

PDF

79.9 KB Created: 2021-03-02 10:40:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59dcb51f914e070b9ccf923e0999704a SHA-1: 73ead51f7b74f4fd3562ab11088d3f07f8d3d544 SHA-256: 163fcd8352e879f11c87d6c7feb99ad15aada90aff26d891a896d3752ce9b011
96 Risk Score

Malware Insights

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

The PDF contains an embedded URI pointing to a suspicious domain, and ClamAV detected it as a phishing trojan. The ML classifier also strongly indicated maliciousness. While no scripts were explicitly extracted, the presence of external URIs suggests an attempt to redirect the user to a malicious site, likely for phishing or to download a secondary payload.

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://nipisod.ru/123?utm_term=best+books+on+personal+finance+2019
    • http://jonebukusopovet.mygamesonline.org/cursos_de_ingles_quais_os_melhores.pdf
    • http://rubyshup.space/2007_hyundai_accent_service_manual_pbl0sd.pdf
    • http://ramuwesitavoz.mywebcommunity.org/ergo_omni_360_cool_air_mesh_newborn.pdf
    • http://rowexusaje.mypressonline.com/74871831267.pdf
    • http://blue-tick-central.com/bavatinoruzevadeb6a4q0.pdf
    • http://fullhp.info/sadugerazat7zy2.pdf
    • http://zawugudumi.getenjoyment.net/butezasividujevixiz.pdf
    • http://sujabupinoda.scienceontheweb.net/3674645465.pdf
    • http://dafagaketa.sportsontheweb.net/motorola_hs850_bluetooth_headset_charger.pdf
    • http://feelslike35.com/bosaxigovormfgvx.pdf
    • http://azorocheat6.xyz/map_reading_for_west_africajmekg.pdf
    • http://arendagg.xyz/the_new_roommate_imdbc7fuc.pdf
    • http://storeplus.pro/administration_of_justice_in_nigeria2wey4.pdf
    • http://milanomoda.site/65549689802ckx09.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/rojalexipokadaz/nergie_renouvelable_dfinition.pdf
    • https://s3.amazonaws.com/wajibile/autosar_compendium_free.pdf
    • https://s3.amazonaws.com/midizaxopazeji/68279306473.pdf
    • https://s3.amazonaws.com/fedufiporara/generate_invoice_number_in_excel_spreadsheet.pdf
    • https://s3.amazonaws.com/gezejoputiwinu/zemipiregivolovewov.pdf
    • https://s3.amazonaws.com/zalomi/70962909396.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_off0000f9b5.bin
e091d48641af820a8459517264d3cd3f039adda1c5fff7f74d1aafecf71abba7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF9B5 5744 bytes
font_01_sfnt_off00010d53.bin
f5e52547362d8acee96fbb262af6ab646afbaac9d59b2ff78336f278444f3103		 pdf-font-stream PDF embedded font (sfnt) at offset 0x10D53 10816 bytes

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