Malicious PDF — malware analysis report

Static analysis result for SHA-256 52faa22b1c0c95d7…

MALICIOUS

PDF

83.5 KB Created: 2021-02-28 17:11:42 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 76552e887ab9b09ceda8f5cfe0867ae8 SHA-1: 036454adfe25ded5a0e8d2098d03f4edbb14c4af SHA-256: 52faa22b1c0c95d7baeb4098292072679050dd2a8fbeb530a976ea9997ea9f2c
96 Risk Score

Malware Insights

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

This PDF file was flagged by multiple heuristics, including a critical ClamAV detection and an ML classifier, indicating malicious intent. It contains an embedded URL pointing to a suspicious domain, likely intended to host phishing content or a further payload. The document body, though heavily obfuscated, suggests a lure related to 'bill of rights review worksheet answers'.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://xajibur.ru/wix?keyword=bill+of+rights+review+worksheet+answers PDF link annotation
    • https://static.s123-cdn-static.com/uploads/4421944/normal_5fe4f10f4acec.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4389816/normal_6031b9c2b95ae.pdfIn PDF document text
    • http://peromopativej.mypressonline.com/how_many_pages_does_harry_potter_7_have.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4470405/normal_5fe644ff4a917.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4454306/normal_5fd77ac50bf75.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409998/normal_5fd9ff59e8494.pdfIn PDF document text
    • https://cdn.sqhk.co/lebogomatoze/gdiieih/58364366982.pdfIn PDF document text
    • https://cdn.sqhk.co/zakoduba/ibkibic/nyan_cat_live_wallpaper_iphone.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4483331/normal_5fec200a7e2a8.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4425504/normal_5fda657a3e447.pdfIn PDF document text
    • https://cdn.sqhk.co/pubodegosog/hHJGjd9/educational_nursery_rhymes_songs_with_lyrics_and_action.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4451374/normal_5fe859a1e68bf.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4407318/normal_5fe4d5a51b6a9.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/vapelurowar/audiobook_player_app_android.pdfIn PDF document text
    • https://s3.amazonaws.com/kovilowab/bangla_font_free_for_windows_xp.pdfIn PDF document text
    • https://s3.amazonaws.com/viromibukoleliw/1996_ford_ranger_led_headlights.pdfIn PDF document text
    • http://kopolug.myartsonline.com/83395217211.pdfIn PDF document text
    • http://kavibajegis.onlinewebshop.net/el_nombre_de_la_rosa_castellano.pdfIn PDF document text
    • https://s3.amazonaws.com/vuraradaso/avira_android_optimizer_review.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_off000109ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x109CA 5296 bytes
SHA-256: c0ba153b7e05888e0c5f12e7909146ebf54edaa9cad78586baa08cdc18a862c4
font_01_sfnt_off00011be6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11BE6 10872 bytes
SHA-256: 0c46f0f42ca2b12d9eb2d1667967c61d0bbdbaf538dcaf278ebc056c343d560b

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