Malicious PDF — malware analysis report

Static analysis result for SHA-256 4789b5e445835e0e…

MALICIOUS

PDF

34.5 KB Created: 2021-07-06 08:28:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e7938047b6013b6d942dfcf11eedc12b SHA-1: 410cbf2573365fc135fca2a566b089bbdfdfd385 SHA-256: 4789b5e445835e0e64f3daaa1185a68b98f1ff27cfa7cc303360673f771bf16b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9980

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/431946152/descargar-hack-roblox-jailbreak-2021-game-hack PDF link annotation
    • http://library.gkigadingserpong.org/repository/roblox-hack-generaort_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/do-you-want-free-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-games-free-online-to-play_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-for-ps3-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-robux-with-codes_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/free-robux-meme_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/robux-hack-no-download-no-survey-no-verification_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/buy-all-free-items-roblox-javascript_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/how-to-get-free-robux-with-inspect-element-2021_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/free-gift-card-roblox-codes_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/best-free-spins-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/roblox-survey-for-robux_GM431946152.pdfIn PDF document text
    • http://library.gkigadingserpong.org/repository/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/minecraft-that-you-can-play-for-free_GM479516143.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.library.gkigadingserpong.org/repository/roblox-free-robux-website_GM431946152.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
font_00_sfnt_off00002f31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F31 22364 bytes
SHA-256: a415a8904de38b0ff2b878e440535255c663e822af5563c7f2ec4d8ee8d6d3aa
font_01_sfnt_off000060e4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60E4 19324 bytes
SHA-256: c853596c3cd8a0da0a20fb5475ceeb6e7942c98a9b06ad722b929f60acd15d07

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