Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5712c43640e8dc7…

MALICIOUS

PDF

84.4 KB Created: 2021-03-03 06:06:39 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 99f3e436327e10e17ff06751c4b12516 SHA-1: d721c2ffef08c66003e4fbfb86849fdbcfc8d460 SHA-256: a5712c43640e8dc752ed83b19c12e4535e401e50de9545452b07f9d3bc0df10a
96 Risk Score

Malware Insights

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

The file is a PDF document that contains an embedded external URI pointing to a suspicious domain, identified by ClamAV as Pdf.Phishing.Trojan. The ML classifier also strongly flagged this PDF as malicious. The presence of an external URI suggests an attempt to redirect the user to a malicious site, likely for phishing or to download further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 4

  • ClamAV: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2528dad23a95d95-d2528dad23a95d95-10044376-0
  • 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://golowaki.ru/123?utm_term=what+do+you+do+with+a+public+relations+degree PDF link annotation
    • http://lawalek.iblogger.org/little_fires_everywhere_review_nytimes.pdfIn PDF document text
    • http://tosefabebiribow.scienceontheweb.net/three_branches_of_government_rap_smart_songs.pdfIn PDF document text
    • http://gubokiwurajot.iblogger.org/samsung_galaxy_s5_active_price_in_kenya.pdfIn PDF document text
    • http://vevaxogejaz.scienceontheweb.net/age_to_get_a_drivers_permit_in_new_york.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4480735/normal_5fd66e1667882.pdfIn PDF document text
    • http://sis-paypal.com/learn_traditional_chinese_characters8nn0k.pdfIn PDF document text
    • http://sewukagazub.mypressonline.com/copperplate_calligraphy_free_download.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://foxukekamusun.onlinewebshop.net/zagadukulekalivugaliw.pdfIn PDF document text
    • http://jasosuwer.epizy.com/teclado_cirilico_para_android.pdfIn PDF document text
    • http://sinusisokopex.atwebpages.com/xefilojunijakokipuvidatof.pdfIn PDF document text
    • https://s3.amazonaws.com/nuvukivaxiren/wheel_of_time_tv_show_release_date.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/dekezemujewoz.pdfIn PDF document text
    • https://s3.amazonaws.com/mejigavukolu/cable_stayed_bridge_construction_method.pdfIn PDF document text
    • http://xumerapugegivo.epizy.com/direct_and_indirect_objects_french_worksheets.pdfIn PDF document text
    • https://s3.amazonaws.com/legapatatezisa/22333608529.pdfIn PDF document text
    • https://s3.amazonaws.com/zeworibuzoza/91493347916.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_off00010baa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10BAA 5684 bytes
SHA-256: 78b265418ea9b8731d9cb400caa9f6757fc69243f4ef6f8a43238525540f54c8
font_01_sfnt_off00011f10.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11F10 10964 bytes
SHA-256: 267ba4ba6b66f2172b8c4ee80a76e95678fcdffe847b15bbdfe724b7173c3d45

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