Malicious PDF — malware analysis report

Static analysis result for SHA-256 38a0e5791313b2b7…

MALICIOUS

PDF

34.6 KB Created: 2021-07-05 20:44:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: dfea5fdf03508c3d08e8c43b5178829e SHA-1: a887b7b92c8d943e881897d1dba250f8903851f0 SHA-256: 38a0e5791313b2b72c4438c5dacb28ba75c73c30ec3aa1f6bf02a5c933d92e8c
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains lures for 'free Robux generators' and game hacks, directing users to a suspicious URL. The ML classifier strongly indicated maliciousness, and the document body confirms the lure. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt, likely involving a redirect to a malicious site for further exploitation.

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/431946152/free-robux-generator-no-verification-game-hack PDF link annotation
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-money-in-roblox-adopt-me-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-free-tshit-download_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-group-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/best-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-free-medieval-hood_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spin-and-coins-fbid-links_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/roblox-studio-cheat-sheets_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/how-to-hack-roblox-jailbreak-new-hack-2021-working_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/2021-unpatchable-how-to-noclip-hack-on-roblox_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-para-todos-los-juegos-de-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/hack-coin-master-xyz_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/can-you-give-me-free-robux_GM431946152.pdfIn PDF document text
    • https://library.institutpendidikan.ac.id/repository/coin-master-free-spin-facebook-link_GM406889139.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_off00003162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3162 22008 bytes
SHA-256: cf9c8ef4a13aeb174b249576a03f69623291ec6ece9d3e2e2253420c4c6b4ddf
font_01_sfnt_off000061f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61F5 19072 bytes
SHA-256: e7f1824e88bb300dfe73d0982d2e974b610cf43959a10b1d34f5500451ac8bd8

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