Malicious PDF — malware analysis report

Static analysis result for SHA-256 a4a15b45888275c6…

MALICIOUS

PDF

43.7 KB Created: 2021-06-08 21:48:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 102768f855de8d6d35f662e13a50986c SHA-1: 1796d43d9c2b131ed534deb7bbcf6045fc625deb SHA-256: a4a15b45888275c6c53435c7fefde8d269ddcee4eac10ba407b5ec2ab1846319
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains multiple links to websites offering 'free Robux' or game hacks, a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the embedded URLs point to potentially harmful content. The document body itself is largely unreadable due to encoding issues but contains references to game hacks and URLs.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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/points-for-free-robux-game-hack PDF link annotation
    • http://perpustakaan-stikesmsb.com/repository/free-roblox-adopt-me-pets_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coinmaster-fan-page_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-land-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-microsoft_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/minecraft-hacks-list_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/roblox-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-hack-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-coin-master-hacks-no-verification-or-survey_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/tiktok-free-vs-premium_GM835599320.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/appsmob-info-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/where-can-i-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-spins-from-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • http://perpustakaan-stikesmsb.com/repository/free-robux-cards_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_off00004fb1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4FB1 24560 bytes
SHA-256: 4fa0074a93f60ba21cf2f491c997ae992eb115d9f0a3bd3180021ccf81db15d9
font_01_sfnt_off000087f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87F5 18392 bytes
SHA-256: c0183a62a4d8947cdb172baf078dcb09201ac3b379c35ac64d55122cc2335e50

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