Malicious PDF — malware analysis report

Static analysis result for SHA-256 9154ea8f5d945386…

MALICIOUS

PDF

35.3 KB Created: 2021-06-26 20:58:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 5b0741da2ecff32fda6805abfffa2dc5 SHA-1: 5babc468b9da09b2d440532d05259b413fc226ad SHA-256: 9154ea8f5d94538678ff9f323955f163cdfce9a362351d79f32a046be19a567d
82 Risk Score

Malware Insights

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

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' lure, specifically pointing to 'http://netcdn.co/app/431946152/free-robux-1-pastebin-com-game-hack'. This suggests the document's primary purpose is to trick users into visiting a malicious site, likely for credential harvesting or to download further malware. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/free-robux-1-pastebin-com-game-hack PDF link annotation
    • https://tpp.com.tw/image/data/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/roblox-spongebob-shirt-free_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-face-roblox_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/hack-my-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-2021-robux_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/offers-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/minecraft-education-free_GM479516143.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/how-to-get-free-robux-roblox-2021_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-spins-and-coins-coin-master-links_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/como-hackear-coin-master-sin-verificacion-humana_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/weird-roblox_GM431946152.pdfIn PDF document text
    • https://tpp.com.tw/image/data/files/coin-master-gift-link-hack_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_off0000304a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x304A 22824 bytes
SHA-256: 48dfc8f94142878b94a01c744e4be42535ef3766389d0b128911c8c13367cce5
font_01_sfnt_off000063c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63C3 19460 bytes
SHA-256: 05edb268d2b006efdbe3fe2102c485655d8511de4d1453eb0ffd922d143b9b5b

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