Malicious PDF — malware analysis report

Static analysis result for SHA-256 793221afe56911af…

MALICIOUS

PDF

35.4 KB Created: 2021-07-06 14:37:26 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 79c3d71a5eb2f1d46697e1e0259d770b SHA-1: a9835084fbd605ce21f5e53b5acbd7d93ca1775e SHA-256: 793221afe56911af588cd2f5862da174187abf15434aa3eb2756ea70a7a4e693
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF file contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body also contains this URL, reinforcing the lure. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of it being used for malicious purposes such as phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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.tw/app/406889139/coin-master-daily-free-spins-and-coins-game-hack PDF link annotation
    • http://pustaka.pasca.unand.ac.id/repository/free-roblox-cards-not-used-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-online-free-no-sign-up_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/trickempire-xyz-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-hacker-face_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-free-robux-2021-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/good-hacking-site-for-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-get-free-robux-without-inspect_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-code-for-roblox-unicorn-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/noclip-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-no-add-ons_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/comment-avoir-un-dominus-aureus-free-ssur-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-elemental-battle-grounds-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/cheat-engine-not-working-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/roblox-prompt-player-free-model-purchase_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/free-robux-passtebin_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-the-roblox-birthday-system_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/minecraft-pe-free-download_GM479516143.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/robux-roblox-hack-apk_GM431946152.pdfIn PDF document text
    • http://pustaka.pasca.unand.ac.id/repository/how-to-hack-roblox-2021-no-human-verification_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_002_off00003213.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3213 23084 bytes
SHA-256: 598bccecb9f2a27aacc47f76cc2d9d1bbd8df64bb476bd58fb6f992013e9aaf3
font_01_sfnt_off00006615.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6615 18772 bytes
SHA-256: a1dc96cae1db032b501f6986f060f4567329d4c170f8890bd2780cb4b8189df7

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