Malicious PDF — malware analysis report

Static analysis result for SHA-256 eb274cdf3bcdfe20…

MALICIOUS

PDF

47.1 KB Created: 2021-06-03 05:19:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 9e687d1e028d67c14de441d040f410b8 SHA-1: 37175e53e6826fff7b24aaa53000fb8d01f00930 SHA-256: eb274cdf3bcdfe20b8db1876d569c4a41ba28ae8d4993fd7e1be9186f2a9b091
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, specifically advertising 'game hacks' and 'free generators'. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and 'PDF_MALICIOUS_REDIRECTOR_LINK' strongly indicate a social engineering lure designed to trick users into visiting a malicious site. No scripts were extracted, but the document's structure and embedded URLs point to a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/daily-spin-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/free-minecraft-printables-food-labels_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/static-moonactive-net-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-to-get-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-free-tiktok-like_GM835599320.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-get-roblox-credit-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-daily-free-spin-and-coin_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/earn-robux-websites_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/can-you-actually-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/worst-client_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/games-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/websites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/www-coin-master-hack-xyz_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/moonactive-free-spins_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/coin-master-hack-without-root_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000533e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x533E 25428 bytes
SHA-256: e785fabda376dd59f3ef866ecf47a6d5467efbc2378354771dd7419ed7d19f14
font_01_sfnt_off00008bc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BC5 3124 bytes
SHA-256: a0e4a5f378f23ac829e40ef1a0638115ffab18b17acd7561ed9b637601232063
font_02_sfnt_off000096a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96A7 17896 bytes
SHA-256: f5c28686dcaa6e4f5af5eb824d4c2910815e14a2156f8517a627a86c98a11a8a

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