Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf829b87c2f49751…

MALICIOUS

PDF

45.3 KB Created: 2021-06-09 10:35:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 05eecd6ef4e2236d5c732eb5b7cde5ba SHA-1: 0234feb07ebaba4a82d584b297f9890a1d1d10f6 SHA-256: cf829b87c2f49751f9c158920ac1922431249f27a44987137a37d3e1ebb4ac53
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 0.9864

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/beyond-roblox-hack-scriptr-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-hack-ios_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/you-promised-my-son-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-glitch-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spin-app-for-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-girl-clothes-in-roblox_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-robux-hack-download-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/minecraft-java-edition-free-trial_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/wurst-client-112-2_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/pokemon-go-free-nickname_GM1094591345.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-avatar-free_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/50-free-spins-coin-master-links_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/get-free-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000051a1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51A1 25324 bytes
SHA-256: ca4f1767e616cea0917635e37908f1658ae3db466305eaca8022a3384b542e5e
font_01_sfnt_off00008c67.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8C67 18936 bytes
SHA-256: b9e7fe56227664a091a1d9d68fd38d1228f25565746bd54870b2edc0afbd4822

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