Malicious PDF — malware analysis report

Static analysis result for SHA-256 f1c925244e6afec9…

MALICIOUS

PDF

43.0 KB Created: 2021-06-04 02:43:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 55e650f025b545235a4b128f0f2300a9 SHA-1: 44a51881a2900f5fc5b0b2b07707205a5b8dbec7 SHA-256: f1c925244e6afec90ff2a0650c2e5160041ebf1bec115a08370b5bcb2095efec
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 0.9874

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.online/app/406889139/coin-master-free-spins-link-no-verification-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id//repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-items-in-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/wurst-18_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-daily-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-dungeons-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-mod-updater_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-spin-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/views-for-tiktok-free_GM835599320.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-20-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/pokemon-go-free-7km-eggs-june-2021_GM1094591345.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/coin-master-connection-lost_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-make-a-minecraft-bedrock-server-for-free_GM479516143.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_004_off00004e80.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E80 24212 bytes
SHA-256: 4c0b6c8559de16f94a95a9daf143923c9a6386d8fd882c5058ee28d9baa4fbdc
font_01_sfnt_off000085a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85A6 18188 bytes
SHA-256: 9c028cabc1bb5e28941c56192a15062bca5e24978f6557b783656291ce4b4993

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