Malicious PDF — malware analysis report

Static analysis result for SHA-256 1bc5f8915e9fb780…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 05:43:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 56145cb900a183f30e5db7b0790d9661 SHA-1: 152fe4ba4446390db80ccfec61cd3252ba8cf595 SHA-256: 1bc5f8915e9fb780af3a77413fd9029b66fccd2fb7544b935b6928e42b9e79ce
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/431946152/roblox-avatar-free-game-hack PDF link annotation
    • https://lib.btkljogja.or.id/repository/free-5-robux-site_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-spins-coin-master-app_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/cheat-engin-robux_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/hack-coin-master-android-game_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-free-gen_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-get-free-robux-on-mac-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-hacking-roblox-tutorial_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-hacks-robux-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/blox-fun-info_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-goradiel-rpg-4-hacked_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-vip-pass-free_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-codes-no-verification_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/coin-master-daily-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/free-roblox-accounts-with-robux-real_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/roblox-build-to-survive-the-zombies-cheats_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-hack-pets-in-ninja-legends-roblox_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/all-the-roblox-hacker-ids_GM431946152.pdfIn PDF document text
    • https://lib.btkljogja.or.id/repository/how-to-make-a-t-shirt-in-roblox-for-free_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
font_00_sfnt_off00002e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E13 21856 bytes
SHA-256: f55e7baab2712a3406c90baf4489146aae16ef137cb336a8576788aa8083f94c
font_01_sfnt_off00005e80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E80 18868 bytes
SHA-256: df626e97bf99c12ae2e2dc853053f4c46c230974655dd31d8497af8766a9dbba

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