Malicious PDF — malware analysis report

Static analysis result for SHA-256 66b888aba7f858d8…

MALICIOUS

PDF

45.6 KB Created: 2021-06-08 16:32:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7a88f7092b5d3476c889451be47df0fe SHA-1: 2f32a1329af0486bf8608a3569724b3af2242a56 SHA-256: 66b888aba7f858d842f42a2a87ded29f811bb69ad980ce3fd0a70664a05152b3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to 'free Robux' and game hacks, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were directly extracted, the embedded URLs suggest a redirection to potentially malicious sites designed to exploit user interest in free in-game currency.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 5

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) documents that carry no urgency or charge/dispute escalation.
  • 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.tw/app/431946152/bucks-free-robux-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/hack-avatar_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-acc_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-bedrock-server-hosting-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-font-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/rbx-roblox-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-modded-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/lastrick-com-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-java-edition_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-games-for-kids_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-spoofing_GM1094591345.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-116-free-download_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/will-minecraft-dungeons-be-free_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-reddit_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_004_off0000522f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x522F 26612 bytes
SHA-256: a721ad0221d6261a4a0d1fb2793700c424c7f2182f2572d39ffd6543cb66b20b
font_01_sfnt_off00009033.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9033 18184 bytes
SHA-256: 20fe21bac3ea1fdfd3e9d303706ca0d9cfda2774cdffd259bbf876bca29d6475

Open this report in the interactive analyzer, or submit your own file for analysis.