Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4547de648ff62cb…

MALICIOUS

PDF

44.4 KB Created: 2021-05-13 01:10:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 37be7904f6131256bd969074b88f39e4 SHA-1: a02c20fe7c25509acc5424f02ebc2210488e2742 SHA-256: b4547de648ff62cb16d559bf5e8f89295687436e1866d202be4adada6682bb3f
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document was flagged as malicious by an ML classifier. It uses a ClickFix paste-and-run lure and a password-protected-archive lure. The file routes users through malicious redirector infrastructure and 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 0.9980

Heuristics 6

  • PDF links to a 'free generator / game hack' redirector high PDF_GAME_HACK_REDIRECT_LURE
    PDF's clickable action targets a redirector of the form /app/<id>/<slug>-game-hack — the landing-page shape of a large SEO 'free spins / generator / game hack' lure family that funnels victims through rotating disposable hosts to a malware/scam payload. The multi-link variants also trip ML/link-farm rules; this catches the single-link variants that otherwise score clean.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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
  • 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://netcdn.xyz/app/479516143/is-minecraft-java-edition-free-game-hack PDF link annotation
    • http://perpus.iainkediri.ac.id/pasca/repository/get-free-robux-now_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-link-whatsapp-group_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-no-verify-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-many-levels-does-coin-master-have_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-without-download-apps-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/earn-free-robux-today_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/roblox-arsenal-hacks-download_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/hack-coin-master-apk-33_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/how-to-get-free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/hack-client_GM479516143.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/free-robux-card-codes_GM431946152.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/coin-master-heaven-free-spins-link_GM406889139.pdfIn PDF document text
    • http://perpus.iainkediri.ac.id/pasca/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004e38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E38 26680 bytes
SHA-256: 82db6b4ca37d37eb1476fd65cd4a9b5420837cd8abb5a171e1af77f052b7b5af
font_01_sfnt_off00008b88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B88 18164 bytes
SHA-256: 781be49a7702cf06049b723b9768b43598e981f21f4500b8f56603e8064b4811

Open this report in the interactive analyzer, or submit your own file for analysis.