Malicious PDF — malware analysis report

Static analysis result for SHA-256 5d122ece6409b7bc…

MALICIOUS

PDF

35.4 KB Created: 2021-07-07 07:04:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: b9c5fcf51b31105b461c6836331fc263 SHA-1: 124ebe2b35e731cb369346e62827275f0380142f SHA-256: 5d122ece6409b7bce39ddec313f6b2d1dd306b1365ff98bf185f87602c50865f
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of offering free in-game currency and hacks for popular games. The document contains multiple embedded URLs pointing to sites that likely host malicious content or further phishing attempts. The ML classifier strongly flagged this PDF as malicious, supporting the observed lure.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/406889139/coin-master-free-coins-2021-game-hack PDF link annotation
    • http://aeridefense.com/image/data/files/roblox-cheat_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-hack-to-get-more-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/hack-a-game_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-pants-on-roblox-bc_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-money-hack_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-game-hacking-tricks_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-to-get-free-robux-codes_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/flame-roblox-exploit-free_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/tik-tok-free-fire-30-detik_GM835599320.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/hack-exploit-roblox-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/free-robux-roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/roblox-cheat-engine-download-2021_GM431946152.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/how-do-i-get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/freer-pro-tiktok_GM835599320.pdfIn PDF document text
    • http://aeridefense.com/image/data/files/coin-master-hack-xyz-download-free_GM406889139.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_002_off00003377.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3377 23008 bytes
SHA-256: da7ce5ba95e19cf076b8c0df63da71db854e1985e0c30e22674a7e5c5f8505df
font_01_sfnt_off0000673f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x673F 18400 bytes
SHA-256: 0cc69a54ece3ed14f72d45612a229cad946be49a09675100e3633ee455bac280

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