Malicious PDF — malware analysis report

Static analysis result for SHA-256 f519e5ecfbb7b01b…

MALICIOUS

PDF

41.5 KB Created: 2021-05-10 20:12:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: f78c2110ac714e7119d5f00864e7418b SHA-1: 2d75b202c66ddecf87925d1c0f43e5a822e7b5ee SHA-256: f519e5ecfbb7b01bbce73220d13a30ddc49eb7acc402fb2ff2c8846e95b97c86
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including one identified as a 'free generator / game hack' lure. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs suggests an attempt to redirect the user to a potentially harmful site. The document body, though partially corrupted, contains text related to game hacks and generators, reinforcing the lure.

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/free-coin-and-spin-link-game-hack PDF link annotation
    • http://opac.stiesa.ac.id/repository/minecraft-114-4-download-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-for-real_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-generator-that-works_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-2021-today_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-admin-in-roblox_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/get-free-spins-coin-master-october-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/working-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-tokens-in-minecraft-ps4_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hacks-iphone_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/reddit-coin-master-hack_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_off0000487f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x487F 25456 bytes
SHA-256: 6a564428578b440fdaacaa16cb7f8b4dd7853fa2f43e1ae3a1e553b688b0b8ff
font_01_sfnt_off00008146.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8146 17896 bytes
SHA-256: d4766dae7958252991ea9c600ec63f9574658937c72f1ba15e00730ea5da47af

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