Malicious PDF — malware analysis report

Static analysis result for SHA-256 f992128ef589ff96…

MALICIOUS

PDF

54.7 KB Created: 2021-05-15 01:34:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5d6854b51119d83b5dfcfe18c5f80bb4 SHA-1: 3aee0ed7105b7cb63eb6d7ea26280e44b8689365 SHA-256: f992128ef589ff96f26399cc9e89d4b3496c7253909a6147a693a8869368f577
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 0.8324

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/daily-free-spins-game-hack PDF link annotation
    • http://rafaelmontesinos.com/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/minecraft-java-edition-key-free_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/promo-code-free-robux_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/coin-master-pc-hack-download_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/minecraft-hacked-client-download_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/roblox-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/how-to-hack-coin-master-with-root_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/coin-master-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-coins-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/coin-master-game-hacks_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/roblox-sexually-abused_GM431946152.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://rafaelmontesinos.com/images/free-spins-and-coins-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b5a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B5A 25764 bytes
SHA-256: 7e107741d9584e1fcb67d0b96c8375428e6723f7fdfd7deb31b3c66bbb67d4bf
font_01_sfnt_off00008794.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8794 3152 bytes
SHA-256: d8bc7cd69a69a1851b9d97904f75bbed90a34b65b74f944d896bc28551c46133
font_02_sfnt_off000092a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x92A0 7960 bytes
SHA-256: cf7ae5cf6bef3222f5a26bec705b492fed0278aec6b16ec101aeda46e0edd2b2
font_03_sfnt_off0000a5c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA5C6 18064 bytes
SHA-256: c13d24b09dacab53a31a9a34c8affe100c305689843df97e3c31ade46cbd1ed9
font_04_sfnt_off0000c6e5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC6E5 4272 bytes
SHA-256: fac9a06ceb5574feb8580c075df3ef69dfbd0efa4947186cfe90f11b68eaafb0

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