Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa049cc156ee97d1…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 07:52:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: b29f9f343406557f1989cb7b68cf8c58 SHA-1: 93c95c6a2133633046f8c7b8d0344dedae69cecd SHA-256: aa049cc156ee97d1713ab78c9ce4ffca231aff61d094ec67328d10794e9ff859
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector, that promise free game currency or hacks. The primary lure is 'how-to-get-free-robux-not-a-scam-game-hack'. This suggests a phishing or scam attempt designed to lead users to potentially malicious websites. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/431946152/how-to-get-free-robux-not-a-scam-game-hack In PDF document text
    • https://esl.hess.com.tw/image/data/files/school-campus-free-roblox-uncopylocked_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/cheat-roblox-musculation_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/spiderman-free-roblox-stuff_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-minecraft-survival-server_GM479516143.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-hack-easy-robux-today_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/daily-spin-coin-master-free_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/we-are-devs-hacks-guest-world-roblox_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-hack-version-download-2021_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-roblox-gift-ard-codes-valid-codes_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-spin-app-coin-master_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/secret-skin-combination-get-free-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/moon-static-coin-master-generator-hacks-free_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/hack-noclimb-roblox-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/why-can-i-not-hack-robux_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-hack-mad-paintball-on-roblox_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/tiktok-fans-free_GM835599320.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/no-verification-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://esl.hess.com.tw/image/data/files/coin-master-free-spins-link-download-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_off000030df.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DF 21680 bytes
SHA-256: b93cf959c3a3ee734b52ce735b9ac650411cf7fa94f9d27ae2d695dd2580f250
font_01_sfnt_off0000606a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606A 19244 bytes
SHA-256: 983774d3ab3dc9a6ad7d8a23e2c7ce5fcf81accc4aa13182fbdeb0a54c040bf9

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