Malicious PDF — malware analysis report

Static analysis result for SHA-256 ae7f8a8f96b3c634…

MALICIOUS

PDF

43.4 KB Created: 2021-05-20 04:09:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 97d042b3c829448b44674fa2f10e318c SHA-1: 17230d27dba4848847475cb9d175b02034d3a7ab SHA-256: ae7f8a8f96b3c6342428bdcca1818e3d201b250fe8334ea816cc305837f3e7e9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure and presents a deceptive download button. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-heaven-links-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-cheat-engine-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-coin-and-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-hack-ios_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-robux-generator-tool_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/can-i-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/moonactive-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-version-33-2_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/hacked-roblox-game_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-cheat-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-printable-roblox-images_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-minecraft-addons_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/mcpe-master-hack-unlimited-coins-download_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-change-your-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/hack-robux_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_003_off00004903.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4903 28388 bytes
SHA-256: 71e9955e3f2a225150feea04a5b056a243df636b882388a5d5e064674fd73abd
font_01_sfnt_off00008884.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8884 17828 bytes
SHA-256: 86bc3ccbb1f0b7eb9d1186ac4a23e04190280488fc5550aa3b02c029ce2559b9

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