Malicious PDF — malware analysis report

Static analysis result for SHA-256 da3cef1a342ac4a0…

MALICIOUS

PDF

76.6 KB Created: 2021-03-22 10:05:03 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-11-23
MD5: 5ba215c5fb586c70d6d3274f9909d8ca SHA-1: b465931527313329a532afacb5e29f564c816000 SHA-256: da3cef1a342ac4a0333ef2cde8ce6da5b8b3abec96dc021f3853466ec0572baf
96 Risk Score

Malware Insights

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

The file is a PDF containing embedded URLs, one of which is flagged as malicious. The ML classifier and ClamAV detection strongly indicate malicious intent, likely phishing or malware delivery. The document body, though heavily obfuscated, contains strings related to 'sheet music' and 'australia', suggesting a lure to a fake service. No scripts were extracted, but the presence of malicious URLs points to an attempt to redirect the user to a compromised or malicious site.

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://baarspo.ru/123?utm_term=sheet+music+direct+australia PDF link annotation
    • http://xojuxelase.medianewsonline.com/53240151146.pdfIn PDF document text
    • http://gatofupimekow.mywebcommunity.org/afcat_exam_question_paper.pdfIn PDF document text
    • http://kononameve.mywebcommunity.org/av_sender_manual.pdfIn PDF document text
    • https://xinefozi.weebly.com/uploads/1/3/0/7/130775465/4105859.pdfIn PDF document text
    • http://lebuvowune.getenjoyment.net/11139091846.pdfIn PDF document text
    • https://dudunubute.weebly.com/uploads/1/3/4/1/134132035/282687.pdfIn PDF document text
    • http://lumogodasekepi.mypressonline.com/manual_de_sobrevivencia_escolar_do_ned_download_mp4.pdfIn PDF document text
    • http://tunabamilusi.mypressonline.com/batman_hush_comic_espaol.pdfIn PDF document text
    • http://forisawidokomor.sportsontheweb.net/nudobegofedopozen.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/zopenave/betemamesedutu.pdfIn PDF document text
    • http://xobibaga.myartsonline.com/amc_8_2020_problems.pdfIn PDF document text
    • https://d75bbb92-b0e4-4b50-83e6-2443e695523b.filesusr.com/ugd/bc73b9_da8b173a694147308ba2f4f4b86deb56.pdf?index=trueIn PDF document text
    • https://e98475cc-20b9-4390-ac02-33cb470f3157.filesusr.com/ugd/a9248e_e83faf3303c04c88ab3a6382a3496d70.pdf?index=trueIn PDF document text
    • https://1618b3f4-dcc0-4047-a816-eeb1cbe43c51.filesusr.com/ugd/a01749_da0185e16e7d4ab191c80f7427026a49.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/genedonapubefe/demonstrative_pronouns_worksheets.pdfIn PDF document text
    • http://diwavubodinaroj.myartsonline.com/97028106792.pdfIn PDF document text
    • https://s3.amazonaws.com/tidigudetefumof/heart_shaped_box_piano_westworld_sheet_music.pdfIn PDF document text
    • https://s3.amazonaws.com/fuvidokibet/java_jre_1._6_64_bit.pdfIn PDF document text
    • https://6a8c3f3f-5248-4e80-80e0-4bf2c04f72bc.filesusr.com/ugd/8b2c09_6c64b0b30fce4b81bd1a0f244c1ecd2e.pdf?index=trueIn PDF document text
    • https://s3.amazonaws.com/xapidajovaji/wuvozamukatav.pdfIn PDF document text
    • https://s3.amazonaws.com/widetunipet/746217907.pdfIn PDF document text
    • https://s3.amazonaws.com/wazotojemov/draw_the_shear_and_bending-moment_diagrams_for_the_beam_and_loading_shown_in_the_following_figure.pdfIn PDF document text
    • http://pabotojixupi.atwebpages.com/fuwamiza.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_off0000ee08.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xEE08 5284 bytes
SHA-256: 2af922ef7868cb860de39761224f082efa8adc4fc60b7985b624fcd8800a4abe
font_01_sfnt_off0000ffce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFFCE 10960 bytes
SHA-256: 7dd2c39990f3c21a894ce03ab13271c427d3ded085f476298c6e20ee32009735

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