Malicious PDF — malware analysis report

Static analysis result for SHA-256 91bf4103af7c3e8c…

MALICIOUS

PDF

42.2 KB Created: 2021-05-19 00:24:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: b73a33fe0aaf204fcec9fa1f34ae2c2a SHA-1: da86351a1fc708736c9ee30cdc0668dec96ad141 SHA-256: 91bf4103af7c3e8c7d900c437ef56d9f4be85e438c50f1c58409acdc5986f4e7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a 'GAME_HACK_REDIRECT_LURE' pointing to a suspicious URL. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the embedded URL is the main indicator of malicious intent, likely leading to a malware download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.xyz/app/479516143/free-minecraft-survival-server-game-hack PDF link annotation
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/moonactive-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/rbx-hut_GM431946152.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/fb-coin-master-free-spins-link_GM406889139.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/coin-master-free-spin-bonus_GM406889139.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/minecraft-116-free_GM479516143.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/i-want-free-robux_GM431946152.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/coin-master-village-cost_GM406889139.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-app_GM406889139.pdfIn PDF document text
    • https://www.learning.alfalah.sch.id/__statics/gudangsoal/files/can-lucky-patcher-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/haktuts-coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://learning.alfalah.sch.id/__statics/gudangsoal/files/free-robux-games_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_off00004c6e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4C6E 24244 bytes
SHA-256: df575579ead5bd3d87742accf560e58a70f5ccedac083788c678e744ad41e745
font_01_sfnt_off000083cf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83CF 17896 bytes
SHA-256: a416ee995e2fcdad104e8f08570a8c057a7877f0093c65a8eab662d227b30cb8

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