Malicious PDF — malware analysis report

Static analysis result for SHA-256 ca04926f91ef37ae…

MALICIOUS

PDF

47.4 KB Created: 2021-06-03 05:43:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8a63d07485e8961e501d7bc445653755 SHA-1: 9c248645a9adaa4ac7c9e9a8508516cd901b2ff0 SHA-256: ca04926f91ef37aeab8c9c36ed875f80fe553265d56d149ee6c9ca246c738b0b
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 0.9769

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/431946152/rbl-gg-free-robux-game-hack PDF link annotation
    • http://digilib.iailm.ac.id//repository/free-minecraft-svg-cutting-files_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-realms-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-free-spin_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-robux-without-verify_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-pokemon-go-accounts_GM1094591345.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-attack-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/best-hacked-client_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-free-robux-easy-on-phone_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-hack-download_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-multiplayer-minecraft-server_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/free-spin-coin-master-apk_GM406889139.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_004_off0000507d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x507D 25108 bytes
SHA-256: 557d1e64176891faf7327bac9b9a2e4b2adee283fc7e33754813bb05e82cc9ab
font_01_sfnt_off00008b0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B0C 3120 bytes
SHA-256: 49734f51977507cba6bc8d3ad0cee0363aa119856db094427deb9cf565bb7bca
font_02_sfnt_off00009620.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9620 18376 bytes
SHA-256: 36d8e5c8df31ce5774558eb4dff236d908794f1052653b7bf9d7a2310610d2b4

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