Malicious PDF — malware analysis report

Static analysis result for SHA-256 b3545f1513f7f662…

MALICIOUS

PDF

47.3 KB Created: 2021-06-03 20:00:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 4d492216834ad3d71b7cbab10072d2c0 SHA-1: bd2273d5d93d570be7ba23a520d41f2c3854faac SHA-256: b3545f1513f7f66298335ad66f6897cda98ea42c3bcbc7acdd0383089e061914
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and free currency, directing users to a suspicious URL. It also includes an instruction to disable security software, indicating a malicious intent to bypass defenses. The ML classifier strongly flagged this PDF as malicious, supporting the assessment of a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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 https://netcdn.online/app/431946152/what-is-robux-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-free-models_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-minecraft-java-server_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-coins-and-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-uk_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-daily-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-link-spin_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/can-you-give-me-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-spin-hack-trick_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-version_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-daily-free-spins-link-facebook_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-spin-card-exchange-coin-master_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-coin-spin-daily-link-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-mod-apk-android-1_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-accounts-with-robux-that-work-not-banned-2021_GM431946152.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
font_00_sfnt_off00004f8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F8F 24676 bytes
SHA-256: 5285ed5c9008604573625a9fe5aa80f8088561fed3846babe7ea0268a7a082c8
font_01_sfnt_off00008890.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8890 3884 bytes
SHA-256: 64ea6bfd232c3abde76d8b86727203bfa3f935a5783cd0c1f642cf6d3fb42b29
font_02_sfnt_off00009538.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9538 18548 bytes
SHA-256: 7070353b21eed70d051fcccfd09e1ae143a04993e1be198983edadc0f9da1851

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