Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea9340f9c5a1778c…

MALICIOUS

PDF

33.8 KB Created: 2021-06-30 09:03:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 026d48ad34d4400dfec8c1900d003e28 SHA-1: 7177ca5439655d9cedcffd6ca2fa06c932d1c1f1 SHA-256: ea9340f9c5a1778c5aee0a9b2a688e81b7f6d08da11e7f8dd9d00826d7097602
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious URL, likely intended to lure users into downloading malware or visiting a phishing site. The heuristic firings indicate the PDF is designed as a redirector, using game hack and free currency lures. No scripts were extracted, but the presence of malicious links and the ML classification strongly suggest a malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/admin-in-roblox-hack-game-hack In PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-download-synapse-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/coin-master-free-spins-bit-ly_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robux-2021-september_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hole-in-the-wall-roblox-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id//repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/inappropriate-roblox-games-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-roblox-for-free-stuff_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-cheat-engine-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-hack-mm2_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/minecraft-free-download_GM479516143.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/robux-money-hack_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-get-robux-free-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/how-to-hack-coin-master-using-es-file_GM406889139.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/console-hack-roblox-command_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/free-robuxfr_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/hack-roblox-robux-download-2021_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/roblox-love-free-robux_GM431946152.pdfIn PDF document text
    • http://muslib.unmus.ac.id/repository/toolbox-for-mcpe_GM479516143.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_off00002ec3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2EC3 21732 bytes
SHA-256: c98aea7ea2a7cebe8c4fb87f9d084f875741296871cf70a95204574eb8bb4db7
font_01_sfnt_off00005ebb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EBB 19208 bytes
SHA-256: 983179da20eaf037b9b97a17ba1087cf1fa7a5c80ae8fa53c760d3c1488b9eef

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