Malicious PDF — malware analysis report

Static analysis result for SHA-256 15f858cc43db19a3…

MALICIOUS

PDF

46.7 KB Created: 2021-05-18 00:38:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c5aaf8434895337ce2470db084c095e2 SHA-1: 5ffb9a7f77c4468fd80f78e1b77d1b63b4dbee8c SHA-256: 15f858cc43db19a373e7d977ca2ca194180995cb1758c7697c5686310a0adf6a
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a "free generator / game hack" which redirects to a malicious URL. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect the user to a site that likely hosts further malicious content or exploits.

Machine Learning

  • Nyx PDF Classifier malicious score 0.8948

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/431946152/how-to-get-free-robux-codes-game-hack PDF link annotation
    • http://origamiperu.com/images/robux-prices_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-working_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/robux-2021_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-golden-card-hack_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/free-spins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/how-to-hack-roblox_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/how-do-u-hack-roblox_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-hack-2021-free_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/oprewards-points-generator_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/free-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-free-spins-hack-link_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-free-coins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-hack-extension_GM406889139.pdfIn PDF document text
    • http://origamiperu.com/images/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://origamiperu.com/images/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://origamiperu.com/images/coin-master-claim-free-spins_GM406889139.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_off00004627.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4627 28956 bytes
SHA-256: f444ce751a815a7f16f5be191a8e124aa94e367cd487d09608d2d3cf14383119
font_01_sfnt_off000086dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86DD 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00009384.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9384 18456 bytes
SHA-256: 647704a1f8ac96c456e26df3796ee2ada4959e42324ca69004a5f2968b1e2bf7

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