Malicious PDF — malware analysis report

Static analysis result for SHA-256 bac80ca6f5bacd0f…

MALICIOUS

PDF

44.7 KB Created: 2021-05-14 05:14:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fe854f4bfe09801ad04efc96a64aab50 SHA-1: 521b228f13bf912cc3be090c6c3c6a699caf7774 SHA-256: bac80ca6f5bacd0fcac89acc7ad3d59898df2353e39a2d2f446237ed557448ff
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

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 0.9632

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/431946152/roblox-accounts-for-sale-free-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/free-minecraft-alt-accounts_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/public-enemy-sun-prairie-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-redeem-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/can-you-download-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-pastebin_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-version-download-2021-ios_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/play-minecraft-pocket-edition-for-free_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/easy-way-to-get-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-games-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-account-roblox-with-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-coins-hack_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-unlimited-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/orewards-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/mcpe-master-unlimited-coins-hack-apk_GM406889139.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
stream_003_off000048b6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48B6 23936 bytes
SHA-256: bd748d71ca8b32e8eea8936a59f429a0ce806e69ba8498ce61cdfb116d72bdde
font_01_sfnt_off00007f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F07 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off00008baf.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BAF 18420 bytes
SHA-256: dd3ad9a96696997a3401d80a50f84ab99edff121f3fdc84dc04c1b1c7a8d1cbe

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