Malicious PDF — malware analysis report

Static analysis result for SHA-256 c8c130d390ff75fd…

MALICIOUS

PDF

46.2 KB Created: 2021-06-11 01:36:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: fb016aaa0b98651ae88dbdeb57dad6f4 SHA-1: 141d88193a0553e7c5f1ec38ef8e3fa2be7ef7c2 SHA-256: c8c130d390ff75fd2d2b7b8192a9cd5ee75402581c03525b31679a2a8ae1f4c4
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a lure related to game hacking, specifically mentioning 'Roblox' and 'Cheat Engine'. It embeds multiple URLs that redirect to potentially malicious content, including a primary URL that appears to be a generator or hack. The ML classifier also flagged this PDF as malicious with high confidence. No scripts were extracted from this sample.

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/how-to-disable-colllisions-on-roblox-with-cheat-engine-game-hack PDF link annotation
    • http://zercalo.org/images/is-tiktok-app-free_GM835599320.pdfIn PDF document text
    • http://zercalo.org/images/get-free-robux-now-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/toolbox-for-minecraft-pe-ios_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-draw_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/mcpe-master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/earn-free-robux-for-roblox_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-report-hacker_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-hacked-com-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/free-stuff-in-roblox-2021_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/roblox-free-play-no-download_GM431946152.pdfIn PDF document text
    • http://zercalo.org/images/minecraft-for-ipad-free_GM479516143.pdfIn PDF document text
    • http://zercalo.org/images/coin-master-daily-free-spins-blogspot_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
font_00_sfnt_off00005362.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5362 25648 bytes
SHA-256: 96dccde48974e2a959dc5dc1461be9568075b1e360a96ca655682f7822bfa215
font_01_sfnt_off00008f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0F 19220 bytes
SHA-256: 8523ee1fcdc31ca79bd8c600a4fb449282c97aca61ff3114052e70d86daf630d

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