Malicious PDF — malware analysis report

Static analysis result for SHA-256 39fd68385ab03e2a…

MALICIOUS

PDF

33.2 KB Created: 2021-06-28 04:34:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ddedad2320e15289dbef5f256842ec30 SHA-1: 49467c76aee80e785803c912af50ad24f74c1a08 SHA-256: 39fd68385ab03e2a8e1c5539f73be9c255c24c2ace854695e774343678f20343
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/can-you-use-free-models-in-roblox-game-hack PDF link annotation
    • http://www.compusiteinc.com/images/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-tricks_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/hack-coin-master-app-ios_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-roblox-john_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-cards-hack_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-roblox-place-visits_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/hack-meme-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-roblox-premium_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-minecraft-account_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-roblux-for-roblox_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/minecraft-free-download-android_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/coin-master-heaven-links_GM406889139.pdfIn PDF document text
    • http://www.compusiteinc.com/images/do-you-want-free-robux-get-unlimited-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/hidden-code-in-inquisitor-master-video-for-free-robux_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/free-robux-com_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/hack-roblox-jailbreak-2021-new_GM431946152.pdfIn PDF document text
    • http://www.compusiteinc.com/images/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://www.compusiteinc.com/images/robux-free-c_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
font_00_sfnt_off000029e1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29E1 22564 bytes
SHA-256: 8eec74669e8ea091d0558bc625bac5b317ebbfd01c5feb832a3fc6044892d849
font_01_sfnt_off00005c3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C3D 19324 bytes
SHA-256: 5de7f6e648aaa67cc098c42491b054d2cfdc48a5b31265213dfada0a366fe1ff

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