Malicious PDF — malware analysis report

Static analysis result for SHA-256 698dd1fffbd5c85c…

MALICIOUS

PDF

42.9 KB Created: 2021-06-03 04:56:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: fefe08f01bc2edfa0a52ac41be5fe6d2 SHA-1: 7a993968d5a355cf3257b7bed45219167adcf0f4 SHA-256: 698dd1fffbd5c85ca15fa094ea2cdcbbec5abfcbe87eb68870a2b9a838839807
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 0.9874

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/406889139/coin-master--hack-game-hack PDF link annotation
    • http://library.ulb.ac.id/repository/free-robux-no-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-no-verification_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hack-roblox-players_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/online-coin-master-free-spin-app_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-roblox-clothes-girl_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/pokemon-go-hack-free-coins_GM1094591345.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-name-tag-hacks_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/how-to-get-free-robux-fast_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-fly-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-download-minecraft-for-free-on-iphone_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-android-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-do-you-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/coin-master-hacks-for-android_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_off00004f7b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4F7B 24516 bytes
SHA-256: 15607c67f6a772b3e1b117bfc12f52b0a43a59ad15bdfa2c205be626e75e5c92
font_01_sfnt_off0000869c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x869C 17716 bytes
SHA-256: c15a8689411d8cca9ab0759ab4c496fe9b4353d676dd738e300719e9588112ed

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