Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd7a362c4737b97…

MALICIOUS

PDF

76.5 KB Created: 2021-04-16 04:12:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f70bcba738a5e628006b74bfd4d7bd0c SHA-1: 728ab062232ad26de6eb8988d4fae516e372594a SHA-256: 1fd7a362c4737b97ccc7cb8f4eb66c2e2d14a7bbfefb66636e35102bf896ecd5
96 Risk Score

Malware Insights

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

The PDF file contains an embedded URL that directs users to a phishing site disguised as a crochet tutorial. The ML classifier and ClamAV detection strongly indicate malicious intent. While no scripts were directly extracted, the PDF structure and embedded URI suggest it's designed to trick users into visiting a malicious domain, likely for credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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://ponafet.ru/strik?utm_term=how+to+do+basic+crochet
    • https://cdn.sqhk.co/jakabapewuv/hhibhaG/87307887022.pdf
    • https://cdn.sqhk.co/javukapegami/ghHfTC0/business_management_definition.pdf
    • https://cdn.sqhk.co/zumumolebajo/fuT2ibb/transformers_robots_in_disguise_bumblebee_coloring_pages.pdf
    • http://afracheat8.xyz/76416159820g49ms.pdf
    • http://gojawufeki.getenjoyment.net/download_buku_akuntansi_keuangan_menengah.pdf
    • http://nunesop.scienceontheweb.net/48811272201.pdf
    • http://sinoxaju.mygamesonline.org/adobe_premiere_pro_mac_free_trial.pdf
    • http://strita.space/buziwamofevukupizobetunue0avn.pdf
    • http://bluhgang.best/koropobabdxuzj.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://s3.amazonaws.com/gawabog/game_design_workshop_in_a_box.pdf
    • https://160e4e15-e27a-4ef2-9b26-f67fc0969a86.filesusr.com/ugd/cbdbb6_9aabba72cb954010baa5309938a02e15.pdf?index=true
    • https://uploads.strikinglycdn.com/files/a78396ad-c512-4b09-9eb4-02538a0aa3cd/54860374600.pdf
    • https://s3.amazonaws.com/muxozuvalubi/pulotavi.pdf
    • https://uploads.strikinglycdn.com/files/55b89609-5d91-41ee-b4c9-f8348f2560d4/how_to_make_holy_anointing_oil_in_the_bible.pdf
    • https://uploads.strikinglycdn.com/files/30423916-1054-45ae-a238-2b09b500209c/how_to_work_out_a_rolling_offset.pdf
    • http://lenofafezanobu.atwebpages.com/kepatipisatokinuruvopuk.pdf
    • https://c9254e9e-0e71-498a-8384-ab4c929b52b4.filesusr.com/ugd/0699ff_ea35bb479f2e49dca627f91cf96bb8e4.pdf?index=true
    • https://0778d94d-b67d-49c3-8f6f-43f52d6edec9.filesusr.com/ugd/b85eb0_ea607277499a423c93716f843c22d9ce.pdf?index=true
    • http://samajusinifako.atwebpages.com/gokuvekizorabupuloganenud.pdf
    • https://uploads.strikinglycdn.com/files/aa9c2833-a329-4d59-8016-e8e5dd3344fd/quadra_fire_pellet_stove_insert_troubleshooting.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000edea.bin
bc3745985533d15f9a761a043caa1e4a73d2a111feb1d32a036da08bfb5c30ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0xEDEA 5188 bytes
font_01_sfnt_off0000ff97.bin
204bba93d9449353bc7d21867791777dfc26730ec25b0ef3d350f0f8a48a00a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xFF97 10932 bytes

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