Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e493f835245e313…

MALICIOUS

PDF

44.6 KB Created: 2021-06-04 03:26:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: 229ff2f7c751c024c7df4ee9d2b51549 SHA-1: dc91ff1db0616693bb7076a378bf20b24a3fa142 SHA-256: 8e493f835245e313e72a575d99c19cf8346b198580c539f676251c2c7ff25b4b
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 0.9865

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.online/app/431946152/how-to-change-your-roblox-username-for-free-2021-game-hack PDF link annotation
    • http://www.elibrary.perludem.org/repository/how-to-hack-coin-master-spin-in-hindi_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-get-free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/roblox-bux-free_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-free-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-100-spin_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/get-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/codes-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-without-any-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/hack-de-robux-2021-100-real_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/robux-online_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/how-to-hack-roblox-health_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/fbchampion_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/boost9-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/rbx-place-free-robux_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/how-to-get-free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-pe-free_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-without-verification-ios_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
stream_004_off00004fc5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FC5 24548 bytes
SHA-256: 91481d44b82567eff2720ac23aa66d3f3db240e3d4ebc68dae472679d06424e3
font_01_sfnt_off000086a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86A7 19944 bytes
SHA-256: 272cfab0daaaab9824a536a9c430cdc975267d1e82a4af54df010f86fd52179c

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