Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ee38c28a9c424b3…

MALICIOUS

PDF

44.6 KB Created: 2021-05-15 05:22:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: a5495f63db67d4400cae67d334de2216 SHA-1: c0baefe5f39d7fe507987e7404b2c0a9fbc2d428 SHA-256: 4ee38c28a9c424b307ba388f80c40a4c1c289c8258e2e6923a2ac0dafddc2728
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 0.9632

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.xyz/app/406889139/free-spin-in-coin-master-game-hack PDF link annotation
    • http://killebergsridsport.se/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-do-you-hack-minecraft_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-free-download_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-coins-2021-coin-master-link_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/infinite-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-key-free-spin_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-chest-coin-master_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/how-to-hack-roblox-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/coinmasterhack-club_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/minecraft-rtx-download-free_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-hack-online-generator_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • http://killebergsridsport.se/images/roblox-com-free_GM431946152.pdfIn PDF document text
    • http://killebergsridsport.se/images/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://killebergsridsport.se/images/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004801.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4801 25008 bytes
SHA-256: 164114900a44082fe3ebd8d6c4e05c003227cef5d4358ed80187275da9f58c6c
font_01_sfnt_off00008126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8126 3380 bytes
SHA-256: 1dd933c112880b232546f3aab6a17784a8f412d39fd551cc6eb31c5a04c3ce57
font_02_sfnt_off00008d0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D0E 17884 bytes
SHA-256: d73da77b5a1bbc7a2b5b207bcae6a8efd78ccb1f3c8a04009520d94079973ddb

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