Malicious PDF — malware analysis report

Static analysis result for SHA-256 69679a7cb36121b7…

MALICIOUS

PDF

35.1 KB Created: 2021-07-06 03:51:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 0f3f206425c950d525103d0bb77cf1ff SHA-1: a7013ca6c8bbb227dc37a823fca5e178fea6fecc SHA-256: 69679a7cb36121b786850f74ef6374e2a201db49ef1180f947da68d0bafdaa94
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic indicating it links to a game hack redirector, specifically http://netcdn.tw/app/406889139/coin-master-free-fire-game-hack. The document body, though partially corrupted, also contains this URL and references to game hacks. This suggests a social engineering attack to trick users into visiting a potentially malicious site. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

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/406889139/coin-master-free-fire-game-hack PDF link annotation
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-hack-pc_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-for-free-kids-in-25-seconds-no-verifying_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/10-free-roblox-gears_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/do-you-want-some-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/to-pokemon-go-free-download_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-do-you-hack-pn-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/are-there-free-roblox-game_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-3d-models-for-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-hack-in-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/pokemon-go-free-versus-pc_GM1094591345.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/coin-master-hack-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/robux-hack-inspeccionar_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/daily-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-get-unlimited-money-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://digilib.stie-yppi.ac.id/repository/how-to-buy-robux-for-free_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_002_off000032aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32AA 23288 bytes
SHA-256: ebf951d856d5d23748dd4689ba5dfa3a8e4bf3c8ea6b038e45d36991cd4c6cc0
font_01_sfnt_off0000674d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x674D 17996 bytes
SHA-256: 2ec206c530faa3d40eac36f14655b3e9b935e9ff12c648634e177d5bc9421463

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