Malicious PDF — malware analysis report

Static analysis result for SHA-256 7035c6e58eded8e3…

MALICIOUS

PDF

45.7 KB Created: 2021-06-08 15:14:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 2c28535733a9c6d7abb7acabcdd04a5e SHA-1: 712359007181981cdefac85de5661a239206aa3f SHA-256: 7035c6e58eded8e39f95d45ecb238c5ddf74188d29c25eac5f2b73ab12435821
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 lure, specifically pointing to a URL associated with 'hack-de-roblox-jailbreak-game-hack'. This URL is also present in the document body and extracted URLs. The ML classifier also flagged the PDF as malicious. The primary attack vector appears to be social engineering via a fake generator/hack lure to redirect users to a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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/hack-de-roblox-jailbreak-game-hack PDF link annotation
    • http://www.library.gkigadingserpong.org/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/games-on-roblox-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-noob-vs-pro-vs-hacker-vs-god_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-mod_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-heaven_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-free-download-ipad_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/pokemon-go-free-promo-code_GM1094591345.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-executor-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/hack-coin-master-for-android_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-please_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/hacks-for-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/mosttechs-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-daily-free-spins-25_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/minecraft-bedrock-hacks-windows-10_GM479516143.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_off0000527a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x527A 26384 bytes
SHA-256: 4b21e30e47990fa407223202fe8c369d9cfc77ca2a356acbab34494d7eb39c45
font_01_sfnt_off00008ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8ED2 18636 bytes
SHA-256: 27bcf2c33146583c8330190a5791db6dd13eb64bdded3e67f5a762438e3b0442

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