Malicious PDF — malware analysis report

Static analysis result for SHA-256 88dc899ff53418f5…

MALICIOUS

PDF

36.3 KB Created: 2021-07-04 18:25:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 04a7b46b3f903b74f023b3020f0318ff SHA-1: 25c4653b450168d4239eb916565fb9aa03d1d481 SHA-256: 88dc899ff53418f533ef247d49baa41799cf40c30ff23c883939b1ea2c1d86fc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a suspicious URL. The presence of embedded URLs and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content or initiate downloads. No scripts were extracted from this sample, but the overall pattern suggests a phishing or social engineering attack.

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/get-free-spins-in-coin-master-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/are-tiktok-free-views-hack_GM835599320.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/fly-hack-cheat-engine-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-membership-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-coin-master-spin-hack_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/cheat-in-parkour-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/ho-to-make-a-shirt-in-roblox-2021-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-to-get-emitted-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-robux-memes_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/free-running-roblox-games_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-ro-hero-academia-hack_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-hack-roblox-passwords-2021_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-cheat-apk-free-download_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/can-i-cheat-on-roblox-vip-servers_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/earn-free-robux-roblox-win_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_off0000365e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x365E 23480 bytes
SHA-256: eb7040edcda7d27273cecb3f5da3c209e79ba9baed6c469865719593dcb14770
font_01_sfnt_off00006b8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B8F 18176 bytes
SHA-256: 40bd2a423e8c3e22f2455c3bf096c64e087039c583c2df40abec99adf6858c95

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