Malicious PDF — malware analysis report

Static analysis result for SHA-256 3bae9d6ecd704d7e…

MALICIOUS

PDF

42.3 KB Created: 2021-05-14 01:01:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 5f84d5c6c2044f37b78687ef2cf81107 SHA-1: 9683875926d958d4b0b99991574233b50929ca30 SHA-256: 3bae9d6ecd704d7ec7dc98c5ae929632fa3657e9be27e27a1b25beba23e3ea9d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector infrastructure. The embedded URL and the document body text both promote a 'Coin Master Hack Apk' and link to the malicious domain. While no scripts were extracted, the PDF structure itself facilitates the redirection, indicating a phishing attempt to lure users to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • 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.
  • 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/406889139/coin-master-hack-apk-with-fb-login-game-hack In PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/ways-to-earn-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spin-and-coins-links-home_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-minecraft-realm-codes_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/earn-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-rape-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/wahoo-gaming-co-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-minecraft-account-and-password_GM479516143.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-mobile-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-prison-life-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/hack-card-collection-coin-master_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-hack-game-download-mod-apk_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/coin-master-strategy_GM406889139.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/roblox-free-robux-com_GM431946152.pdfIn PDF document text
    • http://perpustakaan.poltekom.ac.id/repository/free-2021-robux_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_003_off00004aa9.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AA9 24504 bytes
SHA-256: 1099121db5a573ce52c5c997975570c2053f2f895dfee64e061d8b70d0a532b4
font_01_sfnt_off00008154.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8154 18868 bytes
SHA-256: 5fb514d72b6a3127ebf70d681bf63e452f11a73e305fe10841396b7649d51be9

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