Malicious PDF — malware analysis report

Static analysis result for SHA-256 9b972cd4ec941c52…

MALICIOUS

PDF

35.2 KB Created: 2021-06-28 09:37:12 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 6007d016400d07263c0f0c0a6a61da2a SHA-1: c6b0aad8a6a9b975bcaba8b6ad8dfa5311c5bc0b SHA-256: 9b972cd4ec941c52bdb03c8acd635358448b2b4a064bcd34df1a7ae16d9c6c86
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and game hacks, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest it's designed to redirect users to potentially malicious content or phishing sites.

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/free-robux-vido-game-hack PDF link annotation
    • http://www.stttekstil.ac.id/elib/repository/robux-code-redeem-free_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/change-your-roblox-name-for-free-reddit_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/itos-fun-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/no-click-cheats-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/jump-fly-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/coin-master-free-download-pc_GM406889139.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-roblox-dominus_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/get-free-robux-gg_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-free-roux_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/mobihack-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/roblox-jailbreak-free-vip-server-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/free-promo-codes-for-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/wallbank-hack-roblox_GM431946152.pdfIn PDF document text
    • http://www.stttekstil.ac.id/elib/repository/email-roblox-about-hacked-account_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_off0000315e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x315E 22712 bytes
SHA-256: 2a30cb82ba9116b8a591dabfd28ed92fc15b64806f1cebeee90b61f2de6517c0
font_01_sfnt_off00006452.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6452 19144 bytes
SHA-256: 6c491539c3400e1d19de61e1112351d845631a465a9fa527a1fd84607ef36e0b

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