Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ab69f8e6ab4ab38…

MALICIOUS

PDF

33.1 KB Created: 2021-07-21 06:02:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: d321bc6680078495d2ef77272a8c9a96 SHA-1: 22c51b0761d786df10badccf1e451d7adb465852 SHA-256: 1ab69f8e6ab4ab3879ab900d5a2423ee5152daa5b6762229ccc8a2abc4eae568
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9900

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/coin-master-free-spins-app-game-hack PDF link annotation
    • http://www.io24.com.ar/images/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://www.io24.com.ar/images/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.io24.com.ar/images/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • http://www.io24.com.ar/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://www.io24.com.ar/images/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://www.io24.com.ar/images/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.io24.com.ar/images/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://io24.com.ar/images/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://www.io24.com.ar/images/free-modded-minecraft-server_GM479516143.pdfIn PDF document text
    • http://www.io24.com.ar/images/free-robux-websites-no-human-verification_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_off00002ce7.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CE7 23012 bytes
SHA-256: 11637ceedcaf5d4371adc9f0c503359e12c71b20648c25aee1af8439130a8076
font_01_sfnt_off00006097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 17884 bytes
SHA-256: 21af4872a04c62c178ac31651a333ecdcea5bb1ed4ceeeef1956d42e8fc37ea8

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