Malicious PDF — malware analysis report

Static analysis result for SHA-256 28c3b45ab207cb89…

MALICIOUS

PDF

43.5 KB Created: 2021-05-18 05:56:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d6e5f8a9876ef4641f7bd5ce6f0e71d9 SHA-1: 3e3b6bea2fcb8f202d783b29dcad14b585a4878d SHA-256: 28c3b45ab207cb89b81bb44e46778ad742ef8b91e366e4d340ebe0d356c21b56
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. 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 0.9969

Heuristics 4

  • 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.
  • 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/431946152/how-to-get-roebucks-game-hack PDF link annotation
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/cm-free-spin-link-today_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-links-for-today_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/robuxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-roblox-accounts-that-work_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-coins-and-spins-daily_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-hacks-for-cards_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/wizard-hacks_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/best-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-spin-coin-master-game_GM406889139.pdfIn PDF document text
    • https://learning.mtsn1sukabumi.sch.id/__statics/gudangsoal/files/free-robux-gift-card-codes-2021_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_off00004d38.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4D38 25420 bytes
SHA-256: b1f4337bf6800fc56403c3db47b8c5c993c2ac8782a2fa2d70c76a4689cbf4bc
font_01_sfnt_off00008838.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8838 18080 bytes
SHA-256: 011fab2319da63ee6edfd94b81fcdfa8ad38fc25a0e157c4a4fa77e4e52bce04

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