Malicious PDF — malware analysis report

Static analysis result for SHA-256 f4eb841059ef2b8f…

MALICIOUS

PDF

44.1 KB Created: 2021-05-10 14:03:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c907b5886ef8f974576993bc7245458b SHA-1: 3b425b3bac29914b949241ce672525ad54277e71 SHA-256: f4eb841059ef2b8f9b37617a08e06cb7aaf79277aae731199e3e717f07f806e1
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 0.9976

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/www-cheatsk-com-coin-master-hack-game-hack PDF link annotation
    • http://library.acehresearch.org/repository/free-spin-sites-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/get-2021-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-heaven-links-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/best-site-for-free-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-minecraft-hosting-24-7_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/who-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/code-free-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-mod-version-free-download-v344_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/rich-free-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-now_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/robux-free-gift-card-org-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-free-apk_GM479516143.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_off00004b71.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B71 27144 bytes
SHA-256: e0bd147e799ac933a4489762fb460415ebd92718806db7a59c5120f45bced6bc
font_01_sfnt_off00008989.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8989 18504 bytes
SHA-256: 34cd0f80a144e99ec60e90584a0fe8d035c842e631b0412131c0520909d0576d

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