Malicious PDF — malware analysis report

Static analysis result for SHA-256 5cf1f0081045b3ab…

MALICIOUS

PDF

45.4 KB Created: 2021-06-03 22:23:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 7b06b41504972fa88f4d665f4342f6f3 SHA-1: 0f615aa09292d2113abc9c2435dc26c28d207a67 SHA-256: 5cf1f0081045b3ab5c15bd4a94fa494f3420f658895241beed4c5c9b67e89fc8
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to known malicious redirectors and lures users with promises of game hacks or generators. The document body, though partially corrupted, contains references to 'Roblox Avatars' and a URL that aligns with the malicious redirector findings. The presence of multiple redirector links indicates a strong intent to lead the user to malicious content, likely for credential harvesting or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise pattern
  • 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.online/app/431946152/worst-roblox-avatars-game-hack In PDF document text
    • http://perpustakaan.ipts.ac.id/repository/how-to-play-minecraft-online-for-free_GM479516143.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/what-is-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/apps-for-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/roblox-a_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/tiktok-free-likes-trick_GM835599320.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-daily-spin-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/hackear-juego-coin-master-espaol_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/coin-master-fan-club_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/app-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.ipts.ac.id/repository/free-coin-master-spins-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
stream_004_off000051af.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51AF 26224 bytes
SHA-256: e7a2fed46df0f559d287b88f17e4ceac361923d6964056248a65a26f5b898f2c
font_01_sfnt_off00008e24.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E24 18428 bytes
SHA-256: 6ace7b5324c956ccbfd05766e740bf26877bde50396ed9b1cb0e10f1ff81d407

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