Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f1b595a76a9787c…

MALICIOUS

PDF

34.5 KB Created: 2021-06-29 00:27:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ce643ffd895cae3c7c2dca1e80490c8d SHA-1: e97f52cf45d1cb5e3c03db64fa903988c4eaad30 SHA-256: 5f1b595a76a9787cb4378264b1bf6efd7af56937e53fa4670d3ce7b34aa2fd89
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs and a heuristic firing for a 'free generator / game hack' lure, indicating a social engineering attempt. The document body, though partially corrupted, also contains URLs related to game hacks and generators. The primary URL, http://netcdn.co/app/431946152/roblox-prison-life-hacking-game-hack, is likely the destination for the malicious payload or scam. No scripts were extracted from this sample.

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/roblox-prison-life-hacking-game-hack PDF link annotation
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-de-mad-city-rodny-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-accounts-nbc_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/dragon-ball-z-final-stand-hack-scripts-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-clothes-on-roblox-on-mobile_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/wwwcoin-master-hack-apk_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-roblox-account-generator_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-app-android-download_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-hack-app-for-ios_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/how-to-get-minecraft-bedrock-for-free-with-java_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/coin-master-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/minecraft-pe-hack-client-ios_GM479516143.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/roblox-cheat-engine-noclip_GM431946152.pdfIn PDF document text
    • http://digilib.ulm.ac.id/pusat/repository/hack-roblox-accounts-download-file_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
font_00_sfnt_off00003126.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3126 22116 bytes
SHA-256: 47c5f249f23fd79a4e1b4d0413fde7e27d4ded387863434b4ffeed73c04d841f
font_01_sfnt_off00006231.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6231 18932 bytes
SHA-256: 1f98a832cbad1fa141687485879074b1470eed76e3b4a80db2b5a0a98820ec48

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