Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fd4e031890b92cb…

MALICIOUS

PDF

45.9 KB Created: 2021-05-11 14:03:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 207923586efc367930f28f49f534e13e SHA-1: 49b9d56db03e4e4b94b7ea79e7fbb333e28c5182 SHA-256: 1fd4e031890b92cb3b57f2b0ef5f9fdb0109abb3010c8a3f0496416881efe58f
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 0.9432

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/406889139/coin-master-free-spins-5-10-2021-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/legit-coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-apk-hack-35-8_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/games-in-roblox-that-give-you-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/rbx-land-free-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-robux_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/como-hackear-el-juego-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-com-r_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/ww-roblox-come_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/microsoft-roblox-rewards_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-pe-texture-packs-free-download_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-hack-roblox-passwords_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-script-executor_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004756.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4756 27240 bytes
SHA-256: aa148d15696c6b00429010ce13f8d7bf47f3e6c6e033f8281b90620ab96bf127
font_01_sfnt_off00008685.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8685 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00009070.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9070 18420 bytes
SHA-256: d2e643d168acf14731b6ae3c06af54a4078da994fa1104135df6e99201a30058

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