Malicious PDF — malware analysis report

Static analysis result for SHA-256 526f860eaa15811e…

MALICIOUS

PDF

82.5 KB Created: 2021-04-12 16:53:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 750db04f1ec4d46755d7768c2842eba1 SHA-1: bebd8ed86ad7a37d1537a98dbd162261422c95a6 SHA-256: 526f860eaa15811eff43b9c4dfaa1ccbaa62d9673249ce7cf7ba98a6c145ffc1
96 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

The file is a PDF document that contains an embedded URL, identified as malicious by ClamAV and ML classifiers. The document body, though heavily obfuscated, suggests a lure related to a book summary. The presence of the URL and the high confidence detection scores indicate a phishing or malware delivery attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

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://golowaki.ru/strik?utm_term=competition+demystified+book+summary PDF link annotation
    • http://nosumiva.mywebcommunity.org/48101442923.pdfIn PDF document text
    • http://metarapuw.mypressonline.com/vidukathai_download.pdfIn PDF document text
    • http://fesufobototezer.mywebcommunity.org/guitar_chord_chart_poster.pdfIn PDF document text
    • http://zekojotewakugag.mypressonline.com/how_to_configure_d-link_dcs-932l.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4393514/normal_6047f55c0a39e.pdfIn PDF document text
    • http://minosijasif.mypressonline.com/lavizewuzoruvow.pdfIn PDF document text
    • http://figejewumoposes.getenjoyment.net/reasoning_and_analytical_ability_questions_and_answers.pdfIn PDF document text
    • http://xufededubumavif.scienceontheweb.net/96481821120.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4486054/normal_604f09e90d2e9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4408190/normal_604368a21172b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4478137/normal_601546696c340.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4528959/normal_5ff1dd49bffed.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/fekaduvopigab/rocky_4_full_movie_hd_popcorn.pdfIn PDF document text
    • http://jowawaba.atwebpages.com/nicolas_boileau_l_art_potique.pdfIn PDF document text
    • https://s3.amazonaws.com/kegovev/negateru.pdfIn PDF document text
    • https://s3.amazonaws.com/zubata/twelve_apostolic_songs.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/143ea23a-325d-49b0-9377-e011b66244d9/nufuva.pdfIn PDF document text
    • https://s3.amazonaws.com/sonutopexaramuf/70879484708.pdfIn PDF document text
    • https://s3.amazonaws.com/venunamazozuzo/pikidusugam.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2e257074-4582-447c-b96c-f4ba3c94ab6b/66726068007.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/fe051b8f-ddfb-407c-8fde-b5cc6f1dbd14/rebelin_en_la_granja_pelicula_completa.pdfIn PDF document text
    • http://rixibedi.onlinewebshop.net/boolean_algebra_questions_and_solutions.pdfIn PDF document text
    • https://s3.amazonaws.com/fotojipifuzitul/janaboxatekonex.pdfIn PDF document text
    • https://s3.amazonaws.com/vixuwogetiv/tapelefusovopobasipodunuz.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/edb70bda-9231-4f10-96fa-5e188c704990/23692961912.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_off00010218.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10218 5364 bytes
SHA-256: fbe931f79eefd329e404dd12ee96b6817127702ddc16cb7bfc82ce42c5e95b71
font_01_sfnt_off00011447.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x11447 11472 bytes
SHA-256: bf39ffa8e5a29935bca97ad2dce2f328479a03a9b535dd83ca04072fbd4d4c82

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