Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e7d85554fb4ab90…

MALICIOUS

PDF

42.1 KB Created: 2021-05-10 19:04:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: e110b8f236d14264e6de969d4673794d SHA-1: 1f6daea665a5a6f3553cb2fc9ceaac5ad8f30246 SHA-256: 6e7d85554fb4ab9031cbc05203bace67aba5c99bc35796121060cf4e3ccde518
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a critical heuristic firing for a game hack redirector lure, directing users to a known malicious URL. The document body, though partially garbled, contains text related to 'Coin Master Hack' and the malicious URL, reinforcing the lure. The presence of a fake CAPTCHA heuristic further suggests an attempt to trick the user into performing an action, likely to download or execute a payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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-hack-without-verify-game-hack In PDF document text
    • http://opac.library.uib.ac.id/repository/inappropriate-roblox_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/official-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-free-login_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/minecraft-switch-free_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/roblox-svg-free_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/https-iosgodscom-topic-20218flipmastercoinshack_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/omplete-surveys-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-mod-version-free-download-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/best-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id/repository/static-moonactive-net-rewards-2021_GM406889139.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/minecraft-windows-10-free-trial_GM479516143.pdfIn PDF document text
    • http://opac.library.uib.ac.id//repository/how-to-get-free-robux-2021_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
stream_003_off00004860.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4860 24884 bytes
SHA-256: 0580c6457d0736aad9f8174382ba906a10aced5adca0f2115fa7ff9e6397a913
font_01_sfnt_off0000818d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818D 18532 bytes
SHA-256: 3e0328f2eb925fa9474b2fb0440a25955c930b3cfcf15d5dbe2ab1f8ad488f87

Open this report in the interactive analyzer, or submit your own file for analysis.