Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c5a50fbca97cac8…

MALICIOUS

PDF

34.8 KB Created: 2021-07-05 08:41:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2e3c2d6d6357150eb9e352be61e455ef SHA-1: 17f54596c79dd265297698bf9108ede2042dee11 SHA-256: 6c5a50fbca97cac8f0e169b099229d88cd9fb4bc13354c0d49e76484840bc87b
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/coin-master-free-spins-link-today-new-2021-game-hack PDF link annotation
    • http://digilib.unla.ac.id/repository/facebook-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-coin-app_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-minecraft-skins-pc_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hacks-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/hack-to-join-empty-server-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/2021-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/game-guardian-roblox-invisible-hack_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-cards-sets-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-roblox-codes-from-the-toys_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/2021-robux-hacks-no-games-to-be-played_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/coin-master-free-in-app-purchases-jailbreak_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/roblox-hack-people_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/free-spins-coin-master-android_GM406889139.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/is-minecraft-free-on-switch_GM479516143.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/how-to-make-a-group-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.unla.ac.id/repository/mcpe-master-coins-hack-download_GM406889139.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_off0000301a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x301A 22532 bytes
SHA-256: 5bbca1ef6fe11773e55e2605c974bbb6a5b12daf82b836907e32c22f29ecfe22
font_01_sfnt_off00006256.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6256 19264 bytes
SHA-256: 772d40e0bb928acb9341cb75f2b15664b8c4900532e51e1f27089a6d027a4e0b

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