Malicious PDF — malware analysis report

Static analysis result for SHA-256 aca3558f8580459a…

MALICIOUS

PDF

44.7 KB Created: 2021-05-19 09:51:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 28e49cb357ee342e3107dd2921f94dfa SHA-1: 24a174009294fafbd98b029c49ebd7e78b824b87 SHA-256: aca3558f8580459a996747f02831667f205fe9d0c5c1c08245fdf2c54a896f6a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links to external websites that promise free game hacks and currency, such as 'roblox-character-free-game-hack'. The presence of a fake CAPTCHA heuristic suggests an attempt to trick the user into interacting with the document, likely to initiate a download or redirect to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a social engineering tactic to lead users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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.xyz/app/431946152/roblox-character-free-game-hack PDF link annotation
    • http://sv-nahetal.de/images/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-hacker-club_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/rbx-claim_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/www-coinmaster_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-minecraft-for-free-on-chromebook_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-minecraft-windows-10-account_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-game_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/minecraft-coins-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/daily-free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/what-pubg-uc-buy_GM1330123889.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-you-get-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/coin-master-hack_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-picture_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/google-how-do-you-get-robux_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://sv-nahetal.de/images/strucid-aimbot_GM431946152.pdfIn PDF document text
    • http://sv-nahetal.de/images/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://sv-nahetal.de/images/free-robux-real_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_003_off00004b3a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B3A 28380 bytes
SHA-256: bd6399348e42d172c342d4fbd2c9c330fd4a006ca21112f6411e2ba82b7d8823
font_01_sfnt_off00008c25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C25 18448 bytes
SHA-256: 05a96a9ae39645995e15b2d168b0f8c4367af40f40b0e0a665e781c288f1fec7

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