Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b5ad16af87b957e…

MALICIOUS

PDF

34.7 KB Created: 2021-07-05 13:04:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6ba43dba766e3dc2d4243f0eb5f72b7a SHA-1: 3231473e434931dc6eee60f78b715b6817133289 SHA-256: 7b5ad16af87b957e237db252bc15dbee0f761ed8a7337bf6834a2a8e3cc96f92
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a lure related to game hacks and generators, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to a malicious site, likely for credential harvesting or further malware delivery.

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.tw/app/431946152/how-to-change-your-username-on-roblox-for-free-game-hack PDF link annotation
    • http://library.stieyapan.ac.id//repository/coin-master-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/robuxian-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spin-coin-master-new-link_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-free-spins-no-verification_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/synapse-roblox-free-trial_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/hacks-for-sailing-roblox_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/roblox-ghost-simulator-infinite-money-hack_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/get-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://library.stieyapan.ac.id//repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/mcpe-116_GM479516143.pdfIn PDF document text
    • http://library.stieyapan.ac.id/repository/how-can-i-get-minecraft-for-free_GM479516143.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_off00002fa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA9 22332 bytes
SHA-256: 88795826ce6d47c094cba94f1b5dffa183cc0567b5f114148de407fd5192aebd
font_01_sfnt_off00006140.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6140 19540 bytes
SHA-256: 13561b44f61144c121be84d59be9fad9902bdfea6fe0fd721d4b8ce19c369a19

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