Malicious PDF — malware analysis report

Static analysis result for SHA-256 78109d423fa76024…

MALICIOUS

PDF

33.5 KB Created: 2021-07-05 01:42:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 482abda7e94c11c53ca1c32cac08a9c5 SHA-1: d1bae63eaa45f4366777c130af2e5f3e39ccfde8 SHA-256: 78109d423fa76024057cf4558ca126efc072165797618eda0dbd1dbd43c336f2
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 0.9980

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/roblox-zone-free-robux-game-hack PDF link annotation
    • https://elibrary.sttar.ac.id/repository/hack-dev-api-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-robux-gift-card-20210-robux-codes-2021-aug_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-hack-ipad-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-bloxburg-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-money-hack_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/ming-simulator-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-roblox-intros_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-many-levels-are-there-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-welcome-to-bloxburg-money-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-gamepass-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-draw-roblox-tips_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-buy-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/roblox-free-accessories_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-gift-card-free_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/free-shirts-to-make-for-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/how-to-get-a-lot-of-robux-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.sttar.ac.id/repository/robux-win_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_off00002deb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DEB 21888 bytes
SHA-256: 59f0aac690fcaae3a6d9487787e0c2498aea7c469cc1cdf415e9c644398387c3
font_01_sfnt_off00005e55.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E55 18884 bytes
SHA-256: ee7a09e4b3f15cc364cad973da95635941027bcad42042fb3a1cc04549a97256

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