Malicious PDF — malware analysis report

Static analysis result for SHA-256 127acb6dbd5f97e7…

MALICIOUS

PDF

35.0 KB Created: 2021-07-05 12:51:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: bce0563db933a85566e869058d369fc4 SHA-1: 8ebe0246406a8d0d27b5d4a7094881298f41e628 SHA-256: 127acb6dbd5f97e763ea253ba4575578bfbeb7c34b0d1c40c016d6ac8f518b2d
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 0.9980

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 http://netcdn.tw/app/406889139/mcpe-master-hack-unlimited-coins-download-game-hack PDF link annotation
    • http://stikgiamakassar.ac.id/digilib/repository/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-hack-in-roblox-assassin-on-ipad_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-cheat-codes-builders-club_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/today-coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/hack-coin-master-spin-android_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-mast-hacks_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-roblox-hair-to-wear_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/hack-coin-master-nyc_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-free-templste-stream_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/hacks-for-bitcoin-miner-roblox_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/coin-master-free-spins-activegamer_GM406889139.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/robux-hack-no-verification-or-survey-or-id_GM431946152.pdfIn PDF document text
    • http://stikgiamakassar.ac.id/digilib/repository/roblox-cheat-engine-scripts-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_002_off000030e4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x30E4 22712 bytes
SHA-256: 0f129a1b4290eefadd6d22f7a53eef594668959d6a70fb433c23445a7be3035c
font_01_sfnt_off0000638d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x638D 19208 bytes
SHA-256: 55bd449ca9c9a3662e942640cef298b304cdbd1e08c88d4e10aed8779b927ced

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