Malicious PDF — malware analysis report

Static analysis result for SHA-256 47821aebd7e15965…

MALICIOUS

PDF

52.1 KB Created: 2021-06-04 04:25:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: 81b96f2f08fccebfeac566f48d5b595f SHA-1: 0b9d5c06f8e9df718be593625d9fb30a407944e4 SHA-256: 47821aebd7e15965fa20af33887e44e703dd999dde905643e6f7f06d2a448b18
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 0.9657

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/roblox-cheats-for-jailbreak-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/how-to-play-minecraft-for-free-on-pc_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/today-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/cool-free-minecraft-skins_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/minecraft-free-download-android-apk-014-0_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-stop-attack-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-admin-hack_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-gen_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/dailyrobux_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-group_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/robux-today_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-play-as-guest-free_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00004ffd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FFD 28212 bytes
SHA-256: 2d21984daaa3fe9d52e290a9729640e61fcd40ef46c030d41b809cabfdf40f35
font_01_sfnt_off00008f12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F12 3400 bytes
SHA-256: 75c3a8e6f5c68e0746f893c922e57fd7e888a21fb038f9ae3eedb0a197a59e24
font_02_sfnt_off00009a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A31 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_03_sfnt_off0000a743.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA743 18900 bytes
SHA-256: 076b85b25624eae2dfbb99dfcd52456f9c5ccb3da2efcaefe4c4b0b231fc9f28

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