Malicious PDF — malware analysis report

Static analysis result for SHA-256 4432b02d0f0f7440…

MALICIOUS

PDF

33.6 KB Created: 2021-07-05 21:24:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: e79b25e84e92b5aeb7a319ed83eb50ca SHA-1: 78e85a2e6656d039b8824b9b41b62545aec264e7 SHA-256: 4432b02d0f0f7440ec18202d3ed4e18b75f8d4f1806831d02b8b404468979a64
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic indicating it links to a 'free generator / game hack' redirector, specifically pointing to a URL designed to lure users with promises of game cheats. The document body and embedded URLs reinforce this by mentioning game hacks and free currency for popular games. While no scripts were extracted, the primary attack vector appears to be social engineering via a malicious link within the PDF.

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/coin-master-free-spins-android-game-hack PDF link annotation
    • http://library.umla.ac.id/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/redeem-roblox-card-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-coins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-get-free-pet-snacks-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/change-roblox-username-free_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/pubg-uc-2021_GM1330123889.pdfIn PDF document text
    • http://library.umla.ac.id/repository/get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/7-year-old-roblox_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/robux-free-online_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-twitter-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/mcpe-free-download_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/00-roblox-hacker_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-hack-2021-iphone_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-minecraft-accounts-reddit_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/2021-free-spins-coin-master_GM406889139.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_off00002ed2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ED2 22308 bytes
SHA-256: 69dde3b420aa149650959247f0182a6f6b66d845427370a977cc2c10d4cc6524
font_01_sfnt_off00006074.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6074 18348 bytes
SHA-256: 3aa320ccb9cb7c087074e4ef079b33192d8e05703f275142029ef104db56ac85

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