Malicious PDF — malware analysis report

Static analysis result for SHA-256 51baa1ada8c0fa34…

MALICIOUS

PDF

43.5 KB Created: 2021-06-03 23:38:14 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: dcb91cea6de698cd10bdac1a966de3e0 SHA-1: 84abe438b5da6a985e34a3406d23677171ef3ac2 SHA-256: 51baa1ada8c0fa34748be3c37bf9e8852ec650fe129b2e8ae59ee16c86bf6327
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a game hack redirector, specifically targeting Coin Master. The embedded URL, https://netcdn.online/app/406889139/coin-master-2021-game-hack, is the primary indicator of this lure. While no scripts were extracted, the PDF structure and embedded URLs suggest a social engineering tactic to drive users to a potentially malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.online/app/406889139/coin-master-2021-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-a-roblox-account-easy_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coins-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-attack-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-roblox-hair-codes_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/without-pokemon-go-free-incense_GM1094591345.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-robux-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-on-facebook_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_004_off00004fb5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FB5 24704 bytes
SHA-256: f3704e2623eb8832b626061dc60eb3a49e13e764e75f002f5697e1ae70af1a20
font_01_sfnt_off0000884e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x884E 17948 bytes
SHA-256: 6698963cbb1d852d96c53ab93a77ac893ef1ba4f062b6059a57d43c99368daf9

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