Malicious PDF — malware analysis report

Static analysis result for SHA-256 3968533374cd8d3e…

MALICIOUS

PDF

34.2 KB Created: 2021-07-04 02:11:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 1d322b1968d62d4ff344f75fb947b6f9 SHA-1: 09b3415a74d9e39f1da9359e4fd9d11b571b0d5b SHA-256: 3968533374cd8d3e279d45aec5e8e6a6c7945fe671e3e3ed5adb750bbefc2c81
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for game hacks and generators, directing users to a suspicious URL. The ML classifier strongly flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lure suggest an attempt to redirect users to malicious content, likely for malware distribution or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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/431946152/free-draw-roblox-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-on-ipad-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/rewardrobux-com_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-outfits-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/youtube-robux-pastebin-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-shoulder-pets-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/karina-roblox-zombie-free-zones_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-place-rewards_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-nonwearedevs-roblox-exploit_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/clickme-roblox-giving-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/pokemon-go-free-remote-raid-pass-march-2021_GM1094591345.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-generate-free-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-accounts-2021-with-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-tycoon-hack-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-free-robux-generator-download_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-co_GM431946152.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
font_00_sfnt_off00002dd5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DD5 22672 bytes
SHA-256: 8ddee9c1eb58df6a65393cc0e0f81f632f85e2ae1869e10911445d562ca514fa
font_01_sfnt_off00006097.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6097 18984 bytes
SHA-256: c9a437ed21f5727825c8f5bb4a2a9a84ae98f08afb2ff34fcd41a5b5e7b26fbd

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