Malicious PDF — malware analysis report

Static analysis result for SHA-256 367337f31410831e…

MALICIOUS

PDF

81.4 KB Created: 2021-02-13 05:49:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-10-14
MD5: 8e0bce172795f3db2a9dca6193489de4 SHA-1: 756b54860d1b1c2c93665fa22cc277c261436b7d SHA-256: 367337f31410831e4ac621889af008952bc6f482ecc306863075866a84ff4e9e
96 Risk Score

Malware Insights

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

The PDF contains an embedded URL that directs users to a site impersonating a nutritional information service, likely to phish for credentials or deliver a payload. The ClamAV detection and ML classifier strongly indicate malicious intent. Although no scripts were explicitly extracted, the PDF structure and embedded URI heuristic suggest it is designed to exploit PDF vulnerabilities or trick users into navigating to 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://baarspo.ru/123?utm_term=wendy+nutritional+info PDF link annotation
    • http://studyweb.site/73734058867r4n3k.pdfIn PDF document text
    • https://cdn.sqhk.co/pemoxeriko/iahjhdM/14892120905.pdfIn PDF document text
    • https://cdn.sqhk.co/zifakepavax/RGN2OtP/how_to_write_a_proposal_for_work_template.pdfIn PDF document text
    • https://cdn.sqhk.co/dolafita/nAidaBK/oxygen_concentrator_portable_near_me.pdfIn PDF document text
    • http://itslm.fun/extreme_landings_pro_mac_downloadne035.pdfIn PDF document text
    • https://cdn.sqhk.co/kisunika/whibHhc/81037185748.pdfIn PDF document text
    • https://cdn.sqhk.co/nudofarus/Nghd8ih/vazatinif.pdfIn PDF document text
    • https://cdn.sqhk.co/nokotadi/hihjFjc/video_for_whatsapp_status_funny_download.pdfIn PDF document text
    • https://cdn.sqhk.co/bivuwusim/jeigE2C/musiverse_no_ads_apk.pdfIn PDF document text
    • https://cdn.sqhk.co/xidatelo/N4QihOa/lijexarovipo.pdfIn PDF document text
    • http://biomanua.website/38127213217k2uyw.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/tojazudibumogab/rukozosiweval.pdfIn PDF document text
    • https://s3.amazonaws.com/nimuwet/cdc_droplet_isolation_guidelines.pdfIn PDF document text
    • https://s3.amazonaws.com/muvarelo/lujogimusozemitep.pdfIn PDF document text
    • https://s3.amazonaws.com/ronatiduzoxij/stock_market_courses_online_free.pdfIn PDF document text
    • https://s3.amazonaws.com/wazorixekunafob/game_dev_tycoon_mod_apk_money.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_off0000fffe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFFE 4840 bytes
SHA-256: f0905feaafc0b4e24916b1ac0706d675413a19751a23aacb8c0ef96815090a65
font_01_sfnt_off00011096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11096 11864 bytes
SHA-256: 18b157557a87a71095cd4d29b5373e17b62851daabadb7a4c51d48d8f37a0cca

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