Malicious PDF — malware analysis report

Static analysis result for SHA-256 45835c190756382b…

MALICIOUS

PDF

80.2 KB Created: 2021-03-11 15:21:29 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-22
MD5: ff356b8a31d0c97110a0a14c09336977 SHA-1: cc855204e50f8bea92f76761613a61498bf5a636 SHA-256: 45835c190756382ba30a884c565eb96766e48f9a67510ac0e3c453a4f0e5a866
96 Risk Score

Malware Insights

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

The PDF file was flagged by a machine learning classifier and ClamAV as malicious, specifically as a phishing trojan. It contains an embedded URL that appears to be a lure, disguised as a tutorial. While no scripts were explicitly extracted, the PDF structure and the presence of external URIs suggest an attempt to redirect the user to a malicious website, likely for phishing or further malware delivery.

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://druttle.ru/award?keyword=tutorial+dreamweaver+cc+2020+espa%25C3%25B1ol+pdf PDF link annotation
    • https://cdn.sqhk.co/lolajelor/oKid16t/ninja_masters_snk.pdfIn PDF document text
    • https://cdn.sqhk.co/mowibani/ifjhVje/78877863143.pdfIn PDF document text
    • https://cdn.sqhk.co/kelarega/mgfhwhf/motown_music_internet_radio.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4425916/normal_5ff51a3b9fb5a.pdfIn PDF document text
    • https://cdn.sqhk.co/kosenopelid/aTFrhh9/66772051099.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4426816/normal_60039b03aca50.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://uploads.strikinglycdn.com/files/6e601a8e-2783-4b18-9ef6-e03c8f28a792/moors_and_masonry_abdullah_bey.pdfIn PDF document text
    • https://s3.amazonaws.com/tikofaketonub/acid_bases_phet_weblab_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/7257720f-02c5-4742-a950-28ff448ab6bc/cuanto_es_1_8_de_pulgada_en_cm.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/39e1ba13-7586-4f0c-a79b-afa911d60382/hansel_and_gretel_2013_film.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/df4b86ec-c6b0-4b2b-8805-486af9712058/11236160018.pdfIn PDF document text
    • https://s3.amazonaws.com/rakabexozu/me_abrace_mais_forte.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/580ac768-b91f-4f7a-9554-f86f808a9975/welolasewawarawaxejado.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d38db145-783e-4b52-bb2f-232682d5e289/words_their_way_elementary_spelling_inventory_scoring_guide.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5c62e0d2-bf0d-42ef-b83d-45f7181ce990/the_tempest_movie_shakespeare.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/5d16b6c8-3722-4e0e-8b8c-0a3d2a60bd59/what_happens_at_the_end_of_the_5th_wave_movie.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/43a2d58d-b121-426e-8f48-8a93d88758db/tomopok.pdfIn PDF document text
    • https://s3.amazonaws.com/gifojuxaxeva/bavinelekavevuvekesilipow.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/8de7487e-0b8d-461c-9021-e1dd6478d11a/harley-davidson_livewire_battery_specifications.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/06084f47-1f4f-43b3-8af6-11d18001fd5b/jofonamivuximuwunofu.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_off0000fa0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFA0D 5888 bytes
SHA-256: 44213f08cd555fe7faac9444a9fb23f16d03f73b35d15ed94a48c5a09beaab72
font_01_sfnt_off00010dd8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10DD8 10300 bytes
SHA-256: 21b700ed5415018ce12770654406e5b29fa90051b82e5e623538c877a6c66c4a

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