Malicious PDF — malware analysis report

Static analysis result for SHA-256 f16167da8d657d27…

MALICIOUS

PDF

41.8 KB Created: 2021-05-11 21:41:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: af569d53846375f74cac00bffd377263 SHA-1: 3cf7352704bc13559ec663299020d04e65169fa9 SHA-256: f16167da8d657d27c69c4487937f459cfe54350856b6981fde1e172c80dbf3ed
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for a game hack, directing users to a malicious URL. While no scripts were directly extracted, the PDF structure and embedded links suggest an attempt to redirect users to potentially malicious content or download further payloads. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/coin-master-online-hack-no-survey-no-password-game-hack PDF link annotation
    • http://opac.acehresearch.org/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-2021-hack_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-just-enter-username-and-password_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-generator-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-daily-gifts_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/get-free-roblox_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-and-coins-daily-links_GM406889139.pdfIn PDF document text
    • http://opac.acehresearch.org/repository/coin-master-free-spins-1701-20_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_003_off00004a8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4A8F 23552 bytes
SHA-256: 8dd421734080e569cfa71376520deda5b3683907d9ec302510de00fa4f9e3739
font_01_sfnt_off00007faa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7FAA 18716 bytes
SHA-256: 851b55b86fae67a7710f5a0f414e3dc181a06a9a41e12226fd5d3557d65ffbd6

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