Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c5b1e92b91fafac…

MALICIOUS

PDF

39.0 KB Created: 2021-07-08 10:45:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 7246fdec78605231a1908de71c5fda71 SHA-1: c055bf82b785f03bfff3454c7e2fed5a088d50ca SHA-256: 7c5b1e92b91fafac18c6b72c2ee0f0db8764a6d8a9be6771f0830bf4bba9eb6b
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 0.9659

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/479516143/how-to-hack-a-minecraft-server-and-make-yourself-op-game-hack PDF link annotation
    • http://oca.undil.tl/repository/roblox-generator-com_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-robux-for-free-on-pc-without-downloading_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-hack-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-piano-hacks_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-35-16-hack-apk_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/www-rbx-com_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/appsmobinfo-coinmasterhack-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/coin-master-hack-no-download_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/minecraft-free-games-no-download_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/village-coin_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-wall-hacks-in-roblox_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://oca.undil.tl/repository/get-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://oca.undil.tl/repository/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://oca.undil.tl/repository/roblox-rape_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000300a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x300A 21704 bytes
SHA-256: 6794d9f5c06dd3e34609dd1cab9d4067ffa577e26ff0581aec9cd3ea5e0ac6a3
font_01_sfnt_off00005eec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEC 2848 bytes
SHA-256: e494dfbc17a31b8b677e20f5e37602c538292163208a26380855969ce973a69b
font_02_sfnt_off000068a1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68A1 2800 bytes
SHA-256: 1756bf2370268b82899ca819fa059e16c32fca103da24d388e887c3e7a349852
font_03_sfnt_off00007298.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7298 19172 bytes
SHA-256: de5122dd7140aefbd5e4119096f7d50e8a9323c0cccb37eb35bf32659f598f97

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