Malicious PDF — malware analysis report

Static analysis result for SHA-256 f74bc50c60fbbed7…

MALICIOUS

PDF

42.8 KB Created: 2021-05-15 16:31:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 98d651a36e6a596cb1c25e7226315948 SHA-1: 527ff1802c6f8ad9423bae7248c4993841743710 SHA-256: f74bc50c60fbbed77fdd52120fc0c70e234bfd3f0cbea85b69805ff0033f995c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-confidence heuristic indicating it links to a game hack lure, directing users to a suspicious URL. The document body, though partially corrupted, contains text related to 'free spins' and 'game hack', reinforcing the lure. The embedded link likely leads to a malicious site designed to exploit user interest in free game items.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/get-free-spins-coin-master-october-2021-game-hack PDF link annotation
    • https://alimi.com.tw/upload/files/coin-master-download_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/roblox-ban_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coinmasterfreespinlink_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-ad_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-hack-coin-master-apkmody_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/hack-coin-master-no-survey_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-spin-rewards_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-spins-and-coins-from-coin-master-game_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/free-robux-android_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-free-spin-and-trading_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coin-master-daily-free-coins-link-today_GM406889139.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://alimi.com.tw/upload/files/coinmasterhack-club_GM406889139.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_003_off00004a87.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A87 25392 bytes
SHA-256: 611a27052daa00acb545a2e32eb9b6f9c7ef60b5656cf02211a4a5c7ff20b1b7
font_01_sfnt_off0000842b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x842B 18444 bytes
SHA-256: b16824f866cbb0b2e3293a2fc4d3ea97589f6ec0209b9c1fbefadf3e0951670f

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