Malicious PDF — malware analysis report

Static analysis result for SHA-256 b36439343d9a64a3…

MALICIOUS

PDF

47.7 KB Created: 2021-06-07 12:18:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c3b9ed78fd38ce243e57c0df337377a1 SHA-1: 6d89d408be3a37b759febd1a406eddaf987fb3cc SHA-256: b36439343d9a64a30ec458e46f5d19421b5eba1f7c5ccc957e80fe51c88f6ff7
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 0.9832

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-mobile-generator-net-game-hack PDF link annotation
    • http://alroglobal.com/images/minecraft-pe-free-download-android_GM479516143.pdfIn PDF document text
    • http://alroglobal.com/images/robux-win_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/links-to-get-free-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/make-your-own-roblox-character-for-free_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-fan-page-giveaway_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/free-tiktok-coins_GM835599320.pdfIn PDF document text
    • http://alroglobal.com/images/minecraft-mod-menu-apk_GM479516143.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://alroglobal.com/images/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • http://alroglobal.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://alroglobal.com/images/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/robux-websites-2021_GM431946152.pdfIn PDF document text
    • http://alroglobal.com/images/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • http://alroglobal.com/images/coin-master-free-spins-today-daily-links_GM406889139.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_off0000540b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x540B 29952 bytes
SHA-256: 19a21d7bbb62bd78a6c0b12b43b95c660b94bde5a9fe40c1dd4908ff6b6bc0e7
font_01_sfnt_off00009736.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9736 18600 bytes
SHA-256: e0ba8e073d3aca221241f9b8205016db1643f07335a8aa41fb1ee96ca6bb26c0

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