Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcfef4c1e814a27b…

MALICIOUS

PDF

34.4 KB Created: 2021-07-03 14:42:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: ccc2f36aaf2c9f7bccc7022ee622ea8c SHA-1: 4e4967eef85ada28f8add5e9a06062b78b2c06eb SHA-256: dcfef4c1e814a27b3bf6055d8ee47bf8e36364c69ba07caca7da9f583bfad904
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document employs a common lure of 'free game hacks' to direct users to external URLs, such as http://netcdn.tw/app/406889139/free-coin-master-cheats-game-hack. The ML classifier strongly indicates malicious intent, and the presence of embedded URLs and a call-to-action button further supports a phishing or scamming attack pattern. While no scripts were explicitly extracted, the PDF structure and embedded links suggest it's designed to exploit user interest in game cheats to lead them to potentially harmful sites.

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.tw/app/406889139/free-coin-master-cheats-game-hack PDF link annotation
    • http://library.apsidoarjo.ac.id/repository/super-nice-mml-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-hack-highter-rank-in-group_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-hack-roblox-with-game-guardian_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/hoops-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-font-free_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/ho-to-gte-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/rbx-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/get-me-free-robux_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/roblox-free-hair-promo-codes_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/open-coin-master_GM406889139.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-cheat-quirk-system-in-boku-no-roblox_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/how-to-get-free-robux-on-phone_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/synapse-x-free-download-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-to-get-free-roebucks-without-verification_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/how-do-you-get-free-roebucks_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/games-like-minecraft-but-free_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/check-cashed-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id//repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/best-free-script-executor-roblox-beginner_GM431946152.pdfIn PDF document text
    • http://library.apsidoarjo.ac.id/repository/teach-me-how-to-hack-roblox-accounts_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_002_off00002fce.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FCE 23232 bytes
SHA-256: ad8177739c75ae581c95f8a9bfb1e4df2858092733289b70090d73e52e7f082e
font_01_sfnt_off0000644e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x644E 18164 bytes
SHA-256: 4e327774ea367dd6db8ab9fb2ead9e727b5b85cd8073dc852ad5e8a680729fc1

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