Malicious PDF — malware analysis report

Static analysis result for SHA-256 3ecf5986d1fae13a…

MALICIOUS

PDF

35.9 KB Created: 2021-07-06 01:09:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: eb92ad2178dacfd9661aaeaeb94b2c9e SHA-1: 10abea57266e116559619f9fee28021575b836cd SHA-256: 3ecf5986d1fae13a1b66376f3a4978d1eeabd29636ed3c1c7db1fc430b86cb1d
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/archery-master-3d-hack-unlimited-coins-cheats-game-hack PDF link annotation
    • http://www.otomasi.uinjambi.ac.id/repository/pc-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/coin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/top3k-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-robux-easy-december-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/get-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-roblox-followers-generator-2021_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-boombox-highschool-2-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-codes-9-3-19_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-minecraft-windows-10-for-free-2021_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-coin-master-spins-for-today_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-spins-grom-coin-master_GM406889139.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-games-to-play-for-free_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-faces-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-get-free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-download-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • http://www.otomasi.uinjambi.ac.id/repository/how-to-speed-hack-on-roblox-jailbreak-2021_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
stream_002_off000032fa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x32FA 22984 bytes
SHA-256: 468f9dc24137d25a19f03e89b963950e30250cc7fdc88d9327790e0ce2e14bed
font_01_sfnt_off000066a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66A6 19384 bytes
SHA-256: 6d80dce4fa699b9076a8b175d16ed475ccfb6ff0dc0169280df9c553a7f08f53

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