Malicious PDF — malware analysis report

Static analysis result for SHA-256 bed1159ca4f5ae9a…

MALICIOUS

PDF

45.1 KB Created: 2021-06-09 15:19:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 37a481b7b84090e413907350ecf39b7a SHA-1: 7c5a2bdaf8050d2a99f37cb74ef92b689909437c SHA-256: bed1159ca4f5ae9ae754e67cf06f6242f6059fc0f2798b9849d2f14bbc6c9d7b
82 Risk Score

Malware Insights

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

The PDF document uses a lure related to game hacks and free items to entice users to click on an embedded link. This link, 'https://netcdn.tw/app/431946152/cute-free-stuff-on-roblox-game-hack', is identified as a high-risk redirector. The document's structure and the presence of external links suggest it is designed to lead the user to a malicious site, likely for downloading further malware or executing exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/cute-free-stuff-on-roblox-game-hack PDF link annotation
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/can-you-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/minecraft-free-download_GM479516143.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/how-to-make-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/roblox-cheat-engine-2021-jailbreak_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/minecraft-hacker-skin_GM479516143.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/how-to-get-free-robux-easy-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/hack-robux_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/is-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/free-robux-no-human-verification-or-survey-or-download-2021_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/free-robux-working_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/free-roblox-clothes-for-your-avatar_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/free-roblox-gift-card-codes-2021-unused_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/roblox-hack-client_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/minecraft-pocket-edition-free_GM479516143.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification_GM431946152.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mtsusbbatam.com/__statics/gudangsoal/files/harked-hack-roblox_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
stream_004_off000055bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x55BC 24424 bytes
SHA-256: b7a2af8038808cd3d8cca1d5aa778c003bc9452cdf5fc200f13435d16f519259
font_01_sfnt_off00008dd6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DD6 18192 bytes
SHA-256: a6b915e7016f468889ed3b93934f8cc43e4d030a5546ddc8b69dc33b37ef3c58

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