Malicious PDF — malware analysis report

Static analysis result for SHA-256 28cb3d4b0b1a4d3d…

MALICIOUS

PDF

34.3 KB Created: 2021-06-18 09:11:38 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: f19605beabf2ec19c0baa64aa5890b27 SHA-1: c74a1f3f7f129f883654dc57b68b845d51c96186 SHA-256: 28cb3d4b0b1a4d3d52c7f7f012d9f3bd24ebeef8cea953a6a21cd1d6f361e74a
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains multiple links and text referencing game hacks and free currency for popular games like Roblox and Coin Master. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the presence of numerous related URLs strongly indicate a lure to a malicious site. The document's content and structure suggest it is designed to trick users into downloading potentially malicious files or visiting phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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/super-super-happy-face-roblox-free-game-hack PDF link annotation
    • http://library.patria-artha.ac.id/repository/roblox-hack-stand-user_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/gameflycom-free-robux_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/apk-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-website-no-scam_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-free-bc-v3rm_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-hack-roblox-accounts-2021_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/robux-link_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-roebucks-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hack-version-of-coin-master-apk-download_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/minecraft-pe-free-ios_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/coin-master-free-spins-cash_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/hack-coin-master-with-lucky-patcher_GM406889139.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/cheat-roblox-tire-dans-les-mur_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/commande-cmd-hack-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-robux-app-real_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/roblox-hack-no-human-verification-2021-pc_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/how-to-get-free-packs-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.patria-artha.ac.id/repository/free-spins-coin-master-2021_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_off00002fb6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FB6 22036 bytes
SHA-256: 55845812d8ce8d36ec8d24f7a977eb5b575997f0c209a194768123a8dc062e07
font_01_sfnt_off00006080.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6080 19144 bytes
SHA-256: cdd27e22bb0140cb9cc28403e06a05ba8e760087092d2305bc93b24148cca5bb

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