Malicious PDF — malware analysis report

Static analysis result for SHA-256 90736fa704fef54e…

MALICIOUS

PDF

72.8 KB Created: 2021-01-15 15:48:22 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f8021ccd4c18c114f71242df06f2db80 SHA-1: 0a7b57d50f73d3b66274cf14942df87b8d14dbc8 SHA-256: 90736fa704fef54e86ac94318328344e9e843a416643cca23ffaba1154cfdd0d
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, which is a strong indicator of a phishing or malware distribution attempt. The ML classifier and ClamAV detection further confirm its malicious nature. Although no scripts were explicitly extracted, the PDF structure and embedded URI suggest it's designed to redirect users to a malicious site, likely for phishing or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://traffset.ru/aws?utm_term=calculus+1+exams+pdf PDF link annotation
    • https://cdn.sqhk.co/dasekizob/lieijdX/bovabefetexugirex.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4450728/normal_5fa6879283ea8.pdfIn PDF document text
    • https://cdn.sqhk.co/fumamimed/jj9jaoi/4_pics_1_word_game_answers_all_levels.pdfIn PDF document text
    • https://cdn.sqhk.co/salobosemiv/etanZhb/68964856200.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4414847/normal_5fae192436d91.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4460677/normal_5fdc32de5c4a2.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://s3.amazonaws.com/rodigapigeta/bartley_green_school_ofsted_report.pdfIn PDF document text
    • https://s3.amazonaws.com/widuxade/export_excel_worksheet_to_vba.pdfIn PDF document text
    • https://s3.amazonaws.com/werowibovezoje/wiputedawab.pdfIn PDF document text
    • https://s3.amazonaws.com/fofeguj/lapovosomidobamobujiduwin.pdfIn PDF document text
    • https://s3.amazonaws.com/gajakelegeza/the_fairytale_of_new_york_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/xezujuxoz/sales_follow_up_call_template.pdfIn PDF document text
    • https://s3.amazonaws.com/panokojol/ivoclar_shade_guide_chromascop.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_off0000e139.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE139 5228 bytes
SHA-256: 3ab1712a1bcae82ac22e02f04f291e141d71a855fd034f5e9c7353c68273d093
font_01_sfnt_off0000f2fb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF2FB 10508 bytes
SHA-256: 1637749b290f01f86d667e4597449d979456233b5aaa9c71a2130f0d6f189063