Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad21d0603b566ff8…

MALICIOUS

PDF

80.3 KB Created: 2021-02-22 17:47:34 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-03
MD5: 3b3b166f348126b48e511f5ea7e06fc8 SHA-1: 5c826c293ee47259ae88516d1b95b586a5fe1ceb SHA-256: ad21d0603b566ff81d6ea77850c3d5557be062db5a0c28e06d5e6bb0303a5520
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, indicating an attempt to phish or deliver a payload. The embedded URL, 'https://crophysi.ru/strik?utm_term=what+does+burger+king+have+for+breakfast+menu', is the primary indicator of malicious intent. While no scripts were extracted, the PDF structure and the malicious link strongly suggest a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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://crophysi.ru/strik?utm_term=what+does+burger+king+have+for+breakfast+menu In PDF document text
    • https://cdn-cms.f-static.net/uploads/4368494/normal_601150d437a80.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4449996/normal_5fdeb2ef47d2f.pdfIn PDF document text
    • https://cdn.sqhk.co/puzadowoke/AX1gigj/58628461267.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4403818/normal_60170af35cc18.pdfIn PDF document text
    • https://wajadotufa.weebly.com/uploads/1/3/1/8/131857144/divigowulux-vevonepemekaser.pdfIn PDF document text
    • https://bodonoweti.weebly.com/uploads/1/3/1/8/131856710/firarazoxulo.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4485689/normal_5fde8f7cc48c7.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368477/normal_5ff165f157663.pdfIn PDF document text
    • https://cdn.sqhk.co/rikopekela/cjdhbhd/wuvozev.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4368468/normal_5ffa8e4d59032.pdfIn PDF document text
    • https://cdn.sqhk.co/purilusevike/fdqpLML/40833922791.pdfIn PDF document text
    • https://cdn.sqhk.co/wenejusuzixe/agtotii/walmart_money_card_balance_check_number.pdfIn PDF document text
    • http://tipatav.22web.org/carproof_history_report.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4455179/normal_5fcce5f3e9289.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/pibabopuduj/vesolofamumekizered.pdfIn PDF document text
    • http://makidibe.epizy.com/how_to_render_davinci_resolve_15.pdfIn PDF document text
    • https://s3.amazonaws.com/nosepevozux/belzona_1341_data_sheet.pdfIn PDF document text
    • https://s3.amazonaws.com/minaxigevani/ncert_11th_biology_textbook.pdfIn PDF document text
    • http://kivekedifewu.rf.gd/bexumevimosag.pdfIn PDF document text
    • https://s3.amazonaws.com/muwemivumazulax/6261413100.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_off0000fa22.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA22 5564 bytes
SHA-256: ce5fdc2c50c29c895d995ac1317a268eb2966aa79233640c7e8497587b20e8fa
font_01_sfnt_off00010cf6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10CF6 11352 bytes
SHA-256: 9a16f5bf99206a36d9144c3a18548e6d2534b82c9c83595ddea8ef4480575729

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