Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4efca83323e7c95…

MALICIOUS

PDF

48.4 KB Created: 2021-06-03 23:11:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6d49a11289b18af89b6a29c7466afff9 SHA-1: 1d3d9660cf38aca038d3e542d9ba28c9ff3be066 SHA-256: f4efca83323e7c958ebb4b9c07b5e757ca79a01844bbe17553822e1dee19ffeb
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 0.9796

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.online/app/479516143/how-to-hack-a-minecraft-server-and-make-yourself-op-game-hack PDF link annotation
    • http://perpustakaan-stikesmsb.com/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/blox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spin-gratis-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-to-get-minecraft-coins-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/gamehunters-club-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-no-verification-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/how-do-i-hack-a-roblox-account_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-coin-master-spins-blog_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-obby_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_004_off00005602.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5602 24984 bytes
SHA-256: a59e7511831c3bf1e2a84391c432c8af1999b3a22e1c52096cfc3b59d2a378a7
font_01_sfnt_off00008f0c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F0C 2820 bytes
SHA-256: 34dd21cbcbbf8680f9624d5ddfa25e49232e6768200f74ddacb5347fd7a5f6dc
font_02_sfnt_off000098ad.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x98AD 18884 bytes
SHA-256: c6c75348c8512da505ae943a266b7446b2e14ebdee3fe9748eb8d749779a3ee4

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