Malicious PDF — malware analysis report

Static analysis result for SHA-256 23bda2dbde814532…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 18:07:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 67656cdf3117998990d0576fe88443f7 SHA-1: 7f77c73a0610bf3d9c7d005fae60c009fe1b4c48 SHA-256: 23bda2dbde814532556f5c9eb1f31df9f22c43f9402b87e7b8b38d431f64ea41
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to websites offering game hacks and generators, such as 'minecraft-free-online-games-game-hack'. The presence of a 'Password-protected archive handoff' heuristic suggests a common tactic to bypass security filters by encrypting a payload. The document's content and heuristics strongly indicate a lure for users seeking cheats, likely leading to malware download or a phishing scam.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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/479516143/minecraft-free-online-games-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/roblox-hack-robux-4_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/rewardex-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-bloxburg-house-free_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-cheat-piano-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-tell-if-your-roblox-account-got-hacked_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-acessories-script-hack_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/haktuts-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roxpoes-roblox-exploits-and-hacks_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-gfames-that-dont-take-password_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-serveys_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/quick-robux-hacks_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-free-robux-in-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-hacked-com-2021_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
font_00_sfnt_off000031d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31D5 22276 bytes
SHA-256: 952752acd405efeebe9e98f713dea34b0e9ecc306c94811276ffcf873a7e19b0
font_01_sfnt_off00006305.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6305 18192 bytes
SHA-256: dd259a8a226edfb7beeeab1f7d1930cd74b5ac39a7352f8f4b1a77a7129da92e

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