Malicious PDF — malware analysis report

Static analysis result for SHA-256 45feb37b3dab2b87…

MALICIOUS

PDF

80.8 KB Created: 2021-03-27 17:32:20 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c170827e7ab8dea0a545ce6eba214ab0 SHA-1: 8d72ef7f8f3dc6d7bca5bcb292fd7d000f7f230f SHA-256: 45feb37b3dab2b8729423460a9f3e3386fa2ea9e8c935ff32e4fb894f972aab4
104 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

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

This PDF document was flagged as malicious by ClamAV and an ML classifier. The file presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9997

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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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://resalured.ru/award?keyword=sports+writing+exercises+with+answers+pdf PDF link annotation
    • http://fexevewuli.mypressonline.com/fuxodojejenetiduvuwutim.pdfIn PDF document text
    • https://lexedixejorew.weebly.com/uploads/1/3/1/4/131438453/devokasid.pdfIn PDF document text
    • https://vimasideb.weebly.com/uploads/1/3/3/9/133997972/6843448.pdfIn PDF document text
    • http://lajodibibodi.getenjoyment.net/zarenetefatimumadakaxix.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4499309/normal_601ab4f1e5891.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4501991/normal_5ff1d57194ff6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4375095/normal_603b4b390d5db.pdfIn PDF document text
    • https://static.s123-cdn-static.com/uploads/4420907/normal_5ff77672c6e93.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4474759/normal_605529eea4d57.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379731/normal_6029d22dcecaf.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4481161/normal_60500d1d9141d.pdfIn PDF document text
    • http://xakaderinetatu.mygamesonline.org/fekulokipakamanufinoj.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/fujadabez/dr_berg_intermittent_fasting_meal_plan.pdfIn PDF document text
    • https://s3.amazonaws.com/vapelurowar/hand_held_circular_saw_with_laser_guide.pdfIn PDF document text
    • http://puwukuju.epizy.com/geometry_6._7_dilations_worksheet.pdfIn PDF document text
    • http://nozabikuj.rf.gd/nusokopevakozizote.pdfIn PDF document text
    • https://s3.amazonaws.com/levovod/fubadujawupujigizaju.pdfIn PDF document text
    • https://s3.amazonaws.com/jebokizez/kifodigosagefowagavebawu.pdfIn PDF document text
    • https://s3.amazonaws.com/vovabagubajegeb/factory_reset_cisco_air-lap1142n-e-k9.pdfIn PDF document text
    • http://fulisawuxulinis.rf.gd/gattu_battu_music_video.pdfIn PDF document text
    • http://gakilasefit.myartsonline.com/buvutaterijexadipirovodu.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_off0000fb6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xFB6A 5648 bytes
SHA-256: c40cacb8f32efe63de14a75e8308b24d8c7a522d6e1aaccb65fe06374c45572e
font_01_sfnt_off00010ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10EBB 11636 bytes
SHA-256: cc8cb9551d90d0e701cecc5124c0fb2f3d8ca513e6af8ebbc3ba7e4e95e88d65

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