Malicious PDF — malware analysis report

Static analysis result for SHA-256 97fe396c6299e8d6…

MALICIOUS

PDF

42.6 KB Created: 2021-05-10 19:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: c7c29ad80e75313f48d4acf065b0709f SHA-1: aed25840a953b4999dbf3a08fbdc25ed61f38cfd SHA-256: 97fe396c6299e8d60f24dde9572613802b33ed5f3a81d3f33c1e5cb5a1b723c8
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for game hacks and redirects to a malicious URL. It also displays a fake CAPTCHA to trick the user into interacting with a malicious link. The ML classifier strongly indicated maliciousness, and the PDF structure points to a malicious link as the primary attack vector.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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-spins-coin-master-unlimited-game-hack PDF link annotation
    • https://perpus.uwhs.ac.id/repository/free-minecraft-generator_GM479516143.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/pro-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/minecraft-build-hacks_GM479516143.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-hack-apk-download-2021_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/free-spins-coin-master-site-wwwquoracom_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-hack-unlimited-spins-apk_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/80-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/websites-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/free-robux-just-enter-username_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/free-spins-on-coin-master-cheat_GM406889139.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/offers-for-robux_GM431946152.pdfIn PDF document text
    • https://perpus.uwhs.ac.id/repository/coin-master-free-spins-link-2021-today_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_off000049eb.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49EB 24988 bytes
SHA-256: 962134de38d17ce7415bbf6ebd668fad3612d09b33ff47c6604157cd80b75058
font_01_sfnt_off00008390.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8390 18580 bytes
SHA-256: 8aad0f2405ec9a3272b05944b48a23572f7af0293916013bea6eee8874d320e7

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