Malicious PDF — malware analysis report

Static analysis result for SHA-256 cdffbb703938bd81…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 23:44:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 2ddbb6bfa591c53ff1f69f429a8c6d19 SHA-1: 2ab079e9fd31ddb6a9de62ca91ffd78b5a80ee4d SHA-256: cdffbb703938bd81e333db4be4308ed94dad593756d9a40897273a5cffc1cdcc
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links and a deceptive title related to game hacking, specifically for Roblox and Coin Master. The primary link, http://netcdn.co/app/431946152/hack-roblox-for-robux-no-details-game-hack, is identified as a lure for game hacks. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious sites, likely for credential harvesting or malware delivery. The ML classifier strongly flagged this PDF as malicious.

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/hack-roblox-for-robux-no-details-game-hack PDF link annotation
    • http://lib.stimykpn.ac.id/repository/cheat-power-simulator-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-roblox-using-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/kat-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/is-it-possible-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-hacked-ad_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/catalog-roblox-free-items_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-hack-me_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-fun-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/cool-free-roblox-items_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coinmaster-twitter_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-jailbreak-nclip-hack-2021-may_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-para-tener-robux-en-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-many-free-spin-links-is-there-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-hack-355_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/online-hacking-tricks-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-free-download-ps3_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/hack-de-roblox-apk_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_off00002dbe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DBE 22560 bytes
SHA-256: cc57d1a6a5b1b09a806d4ea82f3757949a326e65b605b9d4813668fd7b6f2530
font_01_sfnt_off0000602b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602B 19352 bytes
SHA-256: efe0ea96477f96690f42dceb9a5995c2246acb80bb9bd8ed03ad5f2e207991ed

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