Malicious PDF — malware analysis report

Static analysis result for SHA-256 b4fd44ebc07011d5…

MALICIOUS

PDF

43.6 KB Created: 2021-05-16 19:07:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 1c558909e804fc2c7052acffe7d0d075 SHA-1: 320a65443d08f64912f98ef30bf22184e6b74571 SHA-256: b4fd44ebc07011d599b6b519e4c7fe334c3b0eca50c40b26f9ebafed0bcc3f36
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one directly to 'netcdn.xyz', which is flagged as a lure for game hacks. The document body and heuristics indicate a social engineering tactic to trick users into visiting potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to redirect users to external resources, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/can-you-really-hack-coin-master-ios-game-hack PDF link annotation
    • https://ethraa.ae/userfiles/files/coin-master-free-spin-and-coin-links_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-menu_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-live_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/oprewards-login_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/100-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-roblox-avatar-ideas_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/wahoogaming-co-free-robux_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/coun-master_GM406889139.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/easy-roblox-today_GM431946152.pdfIn PDF document text
    • https://ethraa.ae/userfiles/files/free-minecraft-for-kids_GM479516143.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_off0000476f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x476F 24088 bytes
SHA-256: baf2f1e065200b77bc8179151e559e8d3b6d547a6c8fa2d3f072fb0c4bec47d5
font_01_sfnt_off00007e2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E2C 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off000087dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87DD 18272 bytes
SHA-256: d6dbfa26c4735c509ef21bc2fb5cbfc43e5651c474b450515f522a35f82f0c88

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