Malicious PDF — malware analysis report

Static analysis result for SHA-256 6b53dcb8494ef2fe…

MALICIOUS

PDF

50.3 KB Created: 2021-06-09 05:37:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1f42af3b34612ca664ab73ed48e37175 SHA-1: 3784bea12d76d5d1b89943d5bd852c65bf8081d0 SHA-256: 6b53dcb8494ef2fe9834c1bf10fa52b0b71b8caa588c7bbaf705f3897af0955d
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 0.9769

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.tw/app/431946152/how-to-call-roblox-on-pc-for-free-game-hack PDF link annotation
    • http://lib.fekon.untad.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-templates_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/master-coin-free-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-no-verification-at-all_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-spins-and-coins-today-gift-reward_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/mcpe-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/minecraft-pe-hacks_GM479516143.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/how-to-get-a-free-dominus-in-roblox_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/roblox-cheat-phantom-forces_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-daily-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.fekon.untad.ac.id/repository/free-roblox-money_GM431946152.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
stream_004_off000051fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51FA 31908 bytes
SHA-256: 1e129be294c210a7cca554cb49ac875d5ef6b96aa7e5c1675f7a21fb2b7f403b
font_01_sfnt_off0000978d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x978D 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000a14f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA14F 18496 bytes
SHA-256: 1c541a93736526f2feff17c805d588e6f5465fdd10330cabb08aeebe887abc48

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