Malicious PDF — malware analysis report

Static analysis result for SHA-256 836135791cd655f5…

MALICIOUS

PDF

48.1 KB Created: 2021-06-04 04:03:21 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: e048d5f593f7c8a516fd576caf66d968 SHA-1: e9c7e7358cd4ba7e7365fd54625ef5ffe0ee887f SHA-256: 836135791cd655f54f70f858caa13e1a0ecc69b6f1a1e73e376d1f0f74644889
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9796

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/431946152/robux-gainer-game-hack PDF link annotation
    • http://lib.untad.ac.id//repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-tiktok-likes-no-human-verification-or-survey_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hacks-roblox_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hacks-for-pet-food_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-hashtags_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-troll-outfits-free_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-tool-pc-download_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-minecraft-pe-server_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/toolbox-for-minecraft_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-cheat-generator-d_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-hack-injection_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-do-u-get-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-account-taker_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/optifine-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/how-can-you-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/tiktok-free-view-uk_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-coin-spin-daily-link-net_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x50DA 30108 bytes
SHA-256: b15dd7b952b69fd3758ac84a236e3f3b6a4011023f07715cabc8413ad53d0941
font_01_sfnt_off00008ff9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FF9 2844 bytes
SHA-256: 0b020d44d68ef4680adc1a010952b014984ad7d4b9ed9f851efb57a64041e860
font_02_sfnt_off0000999f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x999F 18200 bytes
SHA-256: b49f4983386c5e2433966410528fc3ba3932a5551bf841ef6afc48143acf477f

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