Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4e8e6e8d788be62…

MALICIOUS

PDF

46.4 KB Created: 2021-05-16 00:37:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e25769abfaf2171d5874630419340b74 SHA-1: 1158a9ca72a6fe087212ec256f858eabd89e7786 SHA-256: f4e8e6e8d788be6294e0bb93e8500e1b9156bde105d31adea40739dc7fafa78c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically mentioning 'how to get more robux'. The embedded URL and document body text reinforce this lure. While no scripts were directly extracted, the PDF structure and embedded URIs suggest a malicious workflow designed to trick users into visiting potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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.xyz/app/431946152/how-to-get-more-robux-game-hack PDF link annotation
    • http://fradiomas.com/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/coin-master-spins_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/free-gold-cards-coin-master_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/coinmaster-blogspot_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/2021-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/is-there-a-free-version-of-minecraft_GM479516143.pdfIn PDF document text
    • http://fradiomas.com/images/clean-master-hack-coins_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://fradiomas.com/images/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/moonactive-free-spins-link_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/get-free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://fradiomas.com/images/coin-master-free-spins-link-2021-download_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://fradiomas.com/images/robux-app_GM431946152.pdfIn PDF document text
    • http://fradiomas.com/images/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://fradiomas.com/images/how-to-get-free-robux-on-phone_GM431946152.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_003_off0000493b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x493B 25508 bytes
SHA-256: 5e413e36751655952fda299b4a91c185720a1b317fb687935f62af240cf3cf6f
font_01_sfnt_off0000828c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x828C 6700 bytes
SHA-256: ae114634718854704d615808d33fb1b747d90eb28e420080bd5adbdfe7fb6a27
font_02_sfnt_off000092c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92C9 18312 bytes
SHA-256: b63754bab8a539e11eebb32f86c31dbe9ceb60be690df901f3a3ba32c84f6f1e

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