Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbbf43896b6347fc…

MALICIOUS

PDF

34.6 KB Created: 2021-07-06 00:17:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 7d8cb4d6e0ba7dc6c11616aaf75fb607 SHA-1: 7c7dbeea10325f15dfa46998fcd45ab871360e66 SHA-256: dbbf43896b6347fcecb9a887c89b64e202158ee2f5dab31f05e1d4dac4ce784c
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 0.9980

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/coin-master-free-gift-links-2021-game-hack PDF link annotation
    • http://lib.teknik.unimal.ac.id/repository/roblox-ghost-hack_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-download_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-daily_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/best-hack-scripts-for-roblox_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-pet-treats-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/descargar-hack-de-roblox-para-android_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-spins-on-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-spins-link-today-new_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-cheats-for-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/free-roblox-accessories_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/roblox-apocalypse-rising-cheat-engine-codes_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id//repository/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/minecraft-on-computer-free_GM479516143.pdfIn PDF document text
    • http://lib.teknik.unimal.ac.id/repository/202100-free-spins-coin-master_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
font_00_sfnt_off00003125.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3125 22680 bytes
SHA-256: ceb502748c2ee3653f805610c8d30ba84de852ac2f728efbfcb4b256a8850c48
font_01_sfnt_off000063b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 18568 bytes
SHA-256: dca762f67b78dd01cbc18695cdf6cd64c215508eb2894a51983e815140750253

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