Malicious PDF — malware analysis report

Static analysis result for SHA-256 37c6a13fb4cfb4f7…

MALICIOUS

PDF

43.9 KB Created: 2021-06-11 07:58:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 35213d6e32e57ad8ef22486fa7ddd5b4 SHA-1: 127624b8a07e9a19b47a3bcc228d54aa14798d22 SHA-256: 37c6a13fb4cfb4f7ec055d96a3993a616334e52f5915f1e58f16d3bff2061292
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a visual lure to download game hacks and free currency, indicating a social engineering tactic to trick users into downloading potentially malicious files. The ML classifier strongly flagged this PDF as malicious, and the embedded URLs point to suspicious domains hosting similar lures. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-hack-the-streets-game-hack PDF link annotation
    • http://sbm-nn.ru/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-app_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-2021-no-downloading_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/easypoints-gg-roblox_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spins-link-blogspot-today_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-executor_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-hack-coin-master-root_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-play-no-sign-up-or-download_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-change-your-username-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/coin-master-daily-free-spins-link-march-2021_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-speed-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/roblox-free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://sbm-nn.ru/images/spin-coin-master-free_GM406889139.pdfIn PDF document text
    • http://sbm-nn.ru/images/minecraft-114-4-download_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004fe6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FE6 24664 bytes
SHA-256: 914e8143e3c550f9dd1ee06e44be30139ad73dc0d6b96aa1479f1f6fb49ad936
font_01_sfnt_off00008886.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8886 18452 bytes
SHA-256: 3ef1f328e4d31306fc642bdd72de1d6002ac1268c6fba42d5e68a3a9be123ee8

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