Malicious PDF — malware analysis report

Static analysis result for SHA-256 553cd09362a0bd7b…

MALICIOUS

PDF

77.9 KB Created: 2021-03-03 21:45:18 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-07
MD5: 82f0f339891c487dab728cf1ac1a3d88 SHA-1: 8ac18f142ae0f26aa7c84614dfc828b3d14400b0 SHA-256: 553cd09362a0bd7b6871807f3e67f4ae416fdb3e7bca8c0f8009f927fadbc29b
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that mimics a search result for a common query, likely intended to trick the user into clicking it. The ML classifier and ClamAV detection strongly indicate malicious intent, classifying it as a phishing or trojan PDF. While no scripts were explicitly extracted, the PDF structure and embedded URLs are indicative of a phishing lure.

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://seumenha.ru/strik?utm_term=how+do+you+change+the+battery+in+a+serta+remote PDF link annotation
    • http://warupipujamoru.sportsontheweb.net/rexuxidajinuwupinugago.pdfIn PDF document text
    • https://cdn.sqhk.co/rufosopufu/f5idkhf/best_buy_24_hours_near_me.pdfIn PDF document text
    • https://cdn.sqhk.co/sadirorig/JLWGigK/troy_first_united_methodist_church_mi.pdfIn PDF document text
    • http://xidasetetobuge.scienceontheweb.net/mtd_mower_blades_21.pdfIn PDF document text
    • http://dirujadejefogax.iblogger.org/66760402097.pdfIn PDF document text
    • https://cdn.sqhk.co/tevosudav/i28N7BV/cooking_fever_cheat_iphone_download.pdfIn PDF document text
    • https://cdn.sqhk.co/gudijupimeb/aVieIha/fiery_color_controller_e-_25c.pdfIn PDF document text
    • http://mosebuzixat.mywebcommunity.org/xebopulebus.pdfIn PDF document text
    • https://cdn.sqhk.co/moxinivo/e9nP3al/rekizufitupi.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/gasodamuza/dasaxixoruju.pdfIn PDF document text
    • https://s3.amazonaws.com/fujadabez/57580680206.pdfIn PDF document text
    • https://s3.amazonaws.com/woxorojero/accident_report_nc_codes.pdfIn PDF document text
    • https://s3.amazonaws.com/jupoti/xazokodapuremafijipef.pdfIn PDF document text
    • https://s3.amazonaws.com/vefagotoje/printable_number_line_template.pdfIn PDF document text
    • http://nemowuroniru.epizy.com/lightroom_old_version_free_for_android.pdfIn PDF document text
    • http://mugazukadum.onlinewebshop.net/vusuwukozawumarak.pdfIn PDF document text
    • http://kagapoxarizi.rf.gd/watcher_in_the_wings_puzzle_answer.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_off0000f30d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF30D 5616 bytes
SHA-256: 469c927ffc1970b444ee08ac77b0bbc1fe6199a89abece232df7f6d499b86fbf
font_01_sfnt_off0001060d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x1060D 10468 bytes
SHA-256: be7d5105c4efcd611818ab6c585985746887d2c6d25b2333a1a1480c19da4ba9

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