Malicious PDF — malware analysis report

Static analysis result for SHA-256 623a45e47613d47d…

MALICIOUS

PDF

66.5 KB Created: 2021-01-26 00:45:00 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 67f6728d27459e8e810f29428c45643d SHA-1: 27df9a4b318acc91ab2c7914b79b608986b47ae0 SHA-256: 623a45e47613d47d91b91c6126bc91720e4c0962900fdd2317eeef843b89f6ad
104 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The file is a PDF that contains an external URI pointing to a suspicious domain, and it was flagged by a machine learning classifier and ClamAV as malicious. The presence of a 'download button' heuristic further suggests a phishing or malware distribution attempt. No scripts were extracted, but the overall pattern indicates a likely attempt to trick the user into downloading a secondary payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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://trafffe.ru/123?utm_term=kirby+64+the+crystal+shards+rom+fr PDF link annotation
    • http://xesabuzusoneb.66ghz.com/free_simple_website_template_html_css.pdfIn PDF document text
    • http://kulinarny.site/nebugubivuvu20zph.pdfIn PDF document text
    • https://juwabizaf.weebly.com/uploads/1/3/0/9/130969053/7757502.pdfIn PDF document text
    • http://fruit-italy.space/streamlabs_donation_setup_mixerm9ken.pdfIn PDF document text
    • http://jotijitod.66ghz.com/canoscan_4400f_service_manual.pdfIn PDF document text
    • http://blue-tick-central.com/bilufuxategorigupow6pt8i.pdfIn PDF document text
    • http://detonic-shop.website/supuxudigoduzakizulomtmpvv.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/ganubatebedoxez/mandatory_reporting_training_oregon.pdfIn PDF document text
    • http://kexemejalo.epizy.com/hartsville_sc_restaurant_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/zodererezuzuxi/5345537769.pdfIn PDF document text
    • https://s3.amazonaws.com/nunakixuma/soguvi.pdfIn PDF document text
    • https://s3.amazonaws.com/sajatofubote/luwamejijeribezu.pdfIn PDF document text
    • https://s3.amazonaws.com/rekawexuretowo/upper_colorado_river_fly_fishing_report.pdfIn PDF document text
    • https://s3.amazonaws.com/belopudevuzuza/arcsight_logger_installation_and_configuration_guide.pdfIn PDF document text
    • https://s3.amazonaws.com/bokelur/80937408396.pdfIn PDF document text
    • http://sapirilogive.epizy.com/58395155933.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_off0000c2cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC2CF 5712 bytes
SHA-256: 8d3c0da7db1637b044d4a0094f4612a2f263bf1d96770c64e75c597a8696dcf5
font_01_sfnt_off0000d62c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD62C 11104 bytes
SHA-256: e30fe4a5e24af14e196de4eef7d41307891a011f8ccef4ea1a24d8264de0aa75

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