Malicious PDF — malware analysis report

Static analysis result for SHA-256 a58bbaa587471bb9…

MALICIOUS

PDF

44.7 KB Created: 2021-06-08 18:34:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: f88918d3b7d1c7aff92ce4eaea46e240 SHA-1: 2c7b0b92ace25bbf77c10eef971aa3dbacd6e523 SHA-256: a58bbaa587471bb948ad5ffbba2d5aa3d16fa8b8b63524b7bdb57d9bd18b132c
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 0.9865

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/como-volar-en-roblox-hack-game-hack PDF link annotation
    • http://boliviagasenergia.com/images/how-do-we-get-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/free-vip-server-roblox_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-hack-pc_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/archery-master-3d-hack-unlimited-coins-cheats_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/bux-life-free-robux_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-adopt-me-hack_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/is-minecraft-free-on-ps4_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-free-download-mac-full-version_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/hightlighter-player-roblox-cheat_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-games-download-free_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/minecraft-education-edition-free-download_GM479516143.pdfIn PDF document text
    • http://boliviagasenergia.com/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://boliviagasenergia.com/images/coin-master-332-apk-free-download_GM406889139.pdfIn PDF document text
    • http://boliviagasenergia.com/images/roblox-zone-free-robux_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_004_off00004e97.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E97 27276 bytes
SHA-256: 0e72c0d446b1fcb8b26107826742d786aee7de1291e6e1682ca72c85693835d9
font_01_sfnt_off00008b12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8B12 18576 bytes
SHA-256: 03b42acac7b921b75e90e58b30bc87b43e2b872b03e0ff465a4a50d39d86874b

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