Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e2b73818a163714…

MALICIOUS

PDF

80.4 KB Created: 2021-02-22 22:39:50 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-10
MD5: eff7aacc920c0d79b9059e0813c4450b SHA-1: 8e879f1a060e4f782c5f2eddbda270b49aa9f9c5 SHA-256: 4e2b73818a16371481b4c5330bb3ecb0f453db792b518807d51da67b79d574f0
136 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

Heuristics 5

  • ClamAV: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0 critical CLAMAV_DETECTION
    ClamAV detected this file as malware: Pdf.Phishing.Trojan-d2568dad23a94d95-d2568dad23a94d95-10044375-0
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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://leonvi.ru/123?utm_term=is+bose+tws+2+fake PDF link annotation
    • https://cdn-cms.f-static.net/uploads/4411489/normal_60157eadb9d3a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4464523/normal_601b7057f0b49.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4454819/normal_5fc6dafe2ac90.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4407066/normal_6016fdcadce5a.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4382770/normal_6024c16f6c853.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/woxotopapozokev/begaxobafipexom.pdfIn PDF document text
    • https://s3.amazonaws.com/kifutizijebuj/wunote.pdfIn PDF document text
    • https://s3.amazonaws.com/zedudo/13145092206.pdfIn PDF document text
    • https://s3.amazonaws.com/nufidibodudulad/iready_teacher_answer_key.pdfIn PDF document text
    • https://s3.amazonaws.com/bepukuba/bengali_video_songs_a_to_z.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/rosurafebizefesovun.pdfIn PDF document text
    • https://s3.amazonaws.com/fivebo/space_invaders_arcade_game_for_android.pdfIn PDF document text
    • https://s3.amazonaws.com/bubodeliza/fuzonobefaxawebenanokape.pdfIn PDF document text
    • https://s3.amazonaws.com/defipedibe/como_hacer_una_propuesta_de_trabajo.pdfIn PDF document text
    • https://s3.amazonaws.com/wibedubosateg/colors_live_tv_apk.pdfIn PDF document text
    • https://s3.amazonaws.com/bezegoluzose/dte_maharashtra_cet_2019_application_form.pdfIn PDF document text
    • https://s3.amazonaws.com/liwafo/gewot.pdfIn PDF document text
    • https://s3.amazonaws.com/zewimu/45538727166.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_off0000fc96.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFC96 4996 bytes
SHA-256: ec56998dd9bc94f03d6927d828cd278c26940ea4795d4aad6cf89a16742c31d3
font_01_sfnt_off00010dca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DCA 11576 bytes
SHA-256: 40fda0f9451576fca355c52fe1ce6150afb43c54cc65b8a71486926b6b0df3f6