Malicious PDF — malware analysis report

Static analysis result for SHA-256 bfbb58bba3fce614…

MALICIOUS

PDF

44.7 KB Created: 2021-06-02 22:54:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: 2c27f95ee68f1ca6e1c01ae1ef2e0c2b SHA-1: 57106ab8e7ceb2eb58e876e8c351550d28412ddc SHA-256: bfbb58bba3fce6148c32129c5df4468c45515236f3cd407f9a9815c91fae58a6
168 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures related to game hacks and free currency, directing users to a known malicious redirector. The document's structure and embedded URLs strongly suggest a phishing or scam attempt designed to lead users to potentially harmful content. No scripts were extracted, but the PDF's nature points to a social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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
  • 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.xyz/app/431946152/1-million-robux-game-pass-free-game-hack In PDF document text
    • http://yogaschooldecypres.be/images/coin-master-cheat-codes-free_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/minecraft-linux-free_GM479516143.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/20210-free-spin-links-for-coin-master_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/get-free-gold-cards-in-coin-master_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-to-get-roblox-premium-for-free-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-robux-quiz_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-robux-com-no-verification_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/hacker-minecraft-song_GM479516143.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/coin-master-free-spins-and-coins-without-human-verification_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-robux-only-1-step_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-spins-link-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-robux-scams_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/easy-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://yogaschooldecypres.be/images/free-roblox-money_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
stream_004_off000050ca.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x50CA 24692 bytes
SHA-256: e11a6b12a3f77b6b97b715e9db53fbd94b017cf951d7681eeb5a4dcdb4c7e537
font_01_sfnt_off000089ae.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AE 19152 bytes
SHA-256: b9a42305a22a6414328050ca6ea36b8992154b25257bde5bb6123f21fc200c3b

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