Malicious PDF — malware analysis report

Static analysis result for SHA-256 cfacae4a689a8513…

MALICIOUS

PDF

42.7 KB Created: 2021-05-11 04:08:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 6374326d7f6f2f83f98b0e6c6daaa32f SHA-1: 6a5964439622e5a4733c6d74375e3e1434e3a1c6 SHA-256: cfacae4a689a8513ab7593f43cf9bd82f2daa75a1784fb1037f884b75e68c377
142 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free generators, directing users to a suspicious URL. The critical heuristic for 'Recovery secret / private key request' suggests the document may attempt to phish for sensitive credentials. While no scripts were explicitly extracted, the PDF structure and embedded URLs indicate a phishing or credential harvesting attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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://bemviverclin.com.br/images/how-to-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-coins-and-spins-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coinmasterdailyfreespins-com_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-net-free_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/minecraft-pe-hack-client_GM479516143.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/bloxpage-free-robux_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-spin-link-today-download_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/coin-master-free-coins-and-spins-today_GM406889139.pdfIn PDF document text
    • http://bemviverclin.com.br/images/roblox-hacked-version-download_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/free-robux-group_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/how-to-get-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://bemviverclin.com.br/images/original-roblox_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
stream_003_off00004916.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4916 25812 bytes
SHA-256: 5f33aea5f04be1612cbbeaa54de65fa9d7ce37809cb9872a4c146fc6ea563b1d
font_01_sfnt_off00008411.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8411 18504 bytes
SHA-256: 34cd0f80a144e99ec60e90584a0fe8d035c842e631b0412131c0520909d0576d

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