Malicious PDF — malware analysis report

Static analysis result for SHA-256 86cf11e0237df2dd…

MALICIOUS

PDF

35.5 KB Created: 2021-06-19 04:38:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-22
MD5: 4bce55ffd9cb871b780d94baf1f27c51 SHA-1: 16f01fb070a64ecfc5843c972606f472ab443680 SHA-256: 86cf11e0237df2dd6668484523e41cda9449b268559785215ee3960f790f20e7
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 0.9980

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.co/app/431946152/how-to-get-free-robux-on-laptop-2021-game-hack PDF link annotation
    • http://perpus.masda.ac.id/repository/get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-severs_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-70-spin-link-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/rexic-roblox-hack-full-lua_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/infinite-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-apk-2021-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-legit_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/500-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-get-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-minecraft-windows-10-free_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-apk-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/village-coin_GM406889139.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003208.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3208 22436 bytes
SHA-256: 6dbc50bf5715ec5ab985ffc793ad2a2aae1e8a2106a54786e9fe0bb51d3ca2ab
font_01_sfnt_off0000640b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x640B 19564 bytes
SHA-256: 1a824e1ce05383f5454354b334f15ff7cbfdec8526e2cdff053891766deaecf4

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