Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef3e251543fa02c3…

MALICIOUS

PDF

73.5 KB Created: 2021-03-27 10:30:46 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-06-30
MD5: 2483747e70b9090664ed8ee97ba87666 SHA-1: 498e7b40283d1aee44255fa4d56075793b5d8138 SHA-256: ef3e251543fa02c38b058a18e60a7b2995b22671e0af309ae2f98646942f766c
96 Risk Score

Malware Insights

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

The PDF contains a lure related to enabling developer mode on Android devices, which is highly suspicious given the file's malicious verdict. It embeds a URL pointing to a suspicious domain, likely intended to host a malicious payload or redirect to a phishing site. The ML classifier and ClamAV detection strongly indicate malicious intent, likely related to phishing or malware distribution.

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://midufefew.ru/123?utm_term=enable+developer+mode+android+samsung+j7 PDF link annotation
    • http://zimezobot.getenjoyment.net/livro_exodus_leon_uris.pdfIn PDF document text
    • https://cdn.sqhk.co/zowonefaso/cher0Tf/pokemon_masters_ex_mod_apk_2._0._5.pdfIn PDF document text
    • http://dusibarupuguli.medianewsonline.com/ondansetron_zofran_davis.pdfIn PDF document text
    • http://itasda.online/tezedalo2td.pdfIn PDF document text
    • http://twoup-viktoria.online/zeresulexuzodagulijo5zfca.pdfIn PDF document text
    • https://cdn.sqhk.co/dijowasedop/g5jaDGZ/diy_face_mask_pattern_printable.pdfIn PDF document text
    • https://cdn.sqhk.co/ranetixeba/0u6Gjft/gitukodewuzejezadur.pdfIn PDF document text
    • https://cdn.sqhk.co/vekuperik/rjfnvha/grand_battle_royale_pixel_fps_pc.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/zumomasugipeno/why_read_the_handmaids_tale.pdfIn PDF document text
    • https://s3.amazonaws.com/lemefofutomapox/calendar_2019_november.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/f45d4395-8563-40ca-a628-ce9d3aa0e994/john_deere_310_backhoe_hydraulic_oil.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/221d0be0-ea0c-4d66-b675-ee8c02c2c46e/online_demat_account_opening_siddhartha_capital.pdfIn PDF document text
    • https://s3.amazonaws.com/xakapudakadu/56058694623.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/6470178b-8974-461d-aa73-0478713d49b8/67143679235.pdfIn PDF document text
    • https://s3.amazonaws.com/nupotukig/teaching_portfolio_cover_template.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/e59d6019-602c-41bc-b453-00907b75ec54/9303044451.pdfIn PDF document text
    • https://s3.amazonaws.com/vukusa/28293017305.pdfIn PDF document text
    • https://s3.amazonaws.com/pasawexawinogad/boney_m_all_christmas_songs.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_off0000def1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xDEF1 5592 bytes
SHA-256: de19f574bc3d7ea18ee41fae4f5355b711ae8bd77f790df7e918e9cbf9c143e9
font_01_sfnt_off0000f1f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xF1F2 10892 bytes
SHA-256: 756b9f146dd48a6d426771db555ea61e6c3c41f786c71f93d65e3d55158d69cd

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