Malicious PDF — malware analysis report

Static analysis result for SHA-256 581929da2d5e5b7d…

MALICIOUS

PDF

49.0 KB Created: 2021-06-10 23:31:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: deef3abed4d1dfab7e3d802403a31990 SHA-1: 9de2765d8b5d205be9bd5bbc42d1ba580f40fcf8 SHA-256: 581929da2d5e5b7d171d69fab1893f28739399ba04bf945fb7a4f88f2a1a3de4
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 0.9796

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.tw/app/431946152/hacks-for-roblox-pet-simulator-game-hack PDF link annotation
    • http://digilib-ppsunisma.ac.id/repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-get-free-robux-for-kids_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-and-coins-link-today_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-roblox-injector_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/master-coin-free-spin-daily_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-by-watching-ads_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/how-to-hack-a-roblox-account-2021_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-codes-2021-not-used_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-help-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-spins-link-iphone_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/free-robux-no-human-verification-and-no-survey_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/does-roblox-hack-your-computer_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/toolbox-for-minecraft-pe-mod-apk_GM479516143.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/roblox-free-vip-server_GM431946152.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • http://digilib-ppsunisma.ac.id/repository/coin-master-free-coins-link-2021_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_004_off00005171.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5171 28292 bytes
SHA-256: ef0193c25259e134177e81d866302f9613b884fd0774608079629d83caf88671
font_01_sfnt_off000090ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x90CA 2840 bytes
SHA-256: 3fb127b764b9d10f5525bc4de5ec8316de704409ccb0cf21cff3ad8a30d11676
font_02_sfnt_off00009a7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A7C 19124 bytes
SHA-256: a586b30b67fd1b4ffdd896c6c1bf8f5dfcf1a605e27aec21b56b80cce2db40b7

Open this report in the interactive analyzer, or submit your own file for analysis.