Malicious PDF — malware analysis report

Static analysis result for SHA-256 edf9924dbfb522f5…

MALICIOUS

PDF

46.9 KB Created: 2021-06-09 06:03:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: e36cbc1b8454b9cb272c245932a52170 SHA-1: 182be84fdd28e28df2b965620856a32f81c8810e SHA-256: edf9924dbfb522f5b28d2e7e1dd0bccbbda08cdf5dde83d56cd542d87fca46c8
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 0.9832

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/how-to-get-800-robux-for-free-on-computer-game-hack PDF link annotation
    • http://library.persadabunda.ac.id/repository/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-coins-and-spins-group_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-spins-on-coin-master-link_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-without-email_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-coins-and-spins-2021_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-hacks-no-verification_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/minecraft-free-android_GM479516143.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/mcpe-master-unlimited-coins-free-download_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-codes-for-roblox-clothes_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/how-to-get-more-spins-on-coin-master-for-free_GM406889139.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/free-roblox-gun-gsmes_GM431946152.pdfIn PDF document text
    • http://library.persadabunda.ac.id/repository/coin-master-free-spins-no-human-verification_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_off000051db.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51DB 27288 bytes
SHA-256: 3b4a27b31041b1109e27ed02a91e0c911a19766f2668bfc2ce88dff11226e829
font_01_sfnt_off0000923b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x923B 19100 bytes
SHA-256: 796a996af6e899b1d913fe7ca235cc33d61f358c36e5008f5162b99558518ffe

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