Malicious PDF — malware analysis report

Static analysis result for SHA-256 128a40aa17e3d53e…

MALICIOUS

PDF

35.4 KB Created: 2021-07-01 13:22:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 19d49d8a980db441c5a6584d79c55442 SHA-1: 4e5553899753816281d06fc96b62800907489d75 SHA-256: 128a40aa17e3d53e4d494888156369a14c420ebdaf0516502826edfca9a3d56a
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.co/app/431946152/how-to-get-any-roblox-item-for-free-2021-game-hack PDF link annotation
    • https://opac.umrah.ac.id/repository/free-tiktok-followers-and-likes_GM835599320.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/foxy-hacks-com-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-hacks-admin-commands_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/triga-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/robux-mony-free_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-be-invisible-on-roblox-with-cheat-engine_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-cheat-pubg_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-hack-2021-get-free-robux-for-android-and-ios_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-jailbreak-unlimited-free-money-hack_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-account-robux-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/coin-master-unlimited-spin-hack-apk_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/how-to-make-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/claim-free-robux-game_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/roblox-games-with-free-gamepasses_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/download-roblox-hack-robux-pc_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-spin-coin-master-twitter_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/free-roblox-accounts-that-work-2021_GM431946152.pdfIn PDF document text
    • https://opac.umrah.ac.id/repository/youtube-roblox-piano-hack_GM431946152.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
font_00_sfnt_off0000315a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315A 22308 bytes
SHA-256: 5a50bb337aa15e6e58b94ec58fce6ef17ac3b71068f6eae858a789e61b1f6ebc
font_01_sfnt_off0000630b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x630B 19760 bytes
SHA-256: 8ee625f36a636e2ef4c36668c52d7713cc1089ff9f3fe8b8255171052421cf49

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