Malicious PDF — malware analysis report

Static analysis result for SHA-256 dff498e8ba6d2c51…

MALICIOUS

PDF

47.5 KB Created: 2021-06-10 18:22:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 924697ad421efeb400d598a1716ecaaa SHA-1: 664d61ae9d0857e3bab55c650c69f55c6d2cd655 SHA-256: dff498e8ba6d2c51a396e07ebb4f4582b056dec98f5217ca57401936a13ae132
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 0.9769

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.tw/app/431946152/roblox-output-hack-game-hack PDF link annotation
    • http://www.elleventi.it/images/coin-master-hack-without-verification-for-iphone_GM406889139.pdfIn PDF document text
    • http://www.elleventi.it/images/roblox-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/how-to-hack-robux-with-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/how-to-get-free-spins-on-coin-master-android_GM406889139.pdfIn PDF document text
    • http://www.elleventi.it/images/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/hack-pc-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elleventi.it/images/coin-master-link-for-spins_GM406889139.pdfIn PDF document text
    • http://www.elleventi.it/images/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/roblox-com-r_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/how-to-get-more-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elleventi.it/images/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/download-minecraft-free-hiapphere_GM479516143.pdfIn PDF document text
    • http://www.elleventi.it/images/tower-battles-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/free-robux-stream_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.elleventi.it/images/roblox-how-to-get-robux-with-cheat-engine-64_GM431946152.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_004_off00004de9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4DE9 25800 bytes
SHA-256: ecbcc9306d81abea458203b06aa0833184f9345c687748d8bb1f300097f56b74
font_01_sfnt_off000088a4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88A4 3992 bytes
SHA-256: 43e72e756231cfd354bd65c2ed3b09ad4eff56ad11e7f155ed2920e6bb7860dd
font_02_sfnt_off000095cb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95CB 18600 bytes
SHA-256: d4e3f120a6fbd55db8c041fe16f031a65b61a92c93bd520032d1475d27891184

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