Malicious PDF — malware analysis report

Static analysis result for SHA-256 d52b8a36fd38f0e8…

MALICIOUS

PDF

32.9 KB Created: 2021-07-09 01:37:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 5375832e2c297560e27e66ed7777a629 SHA-1: ec1ac3de5e50f2082dfcf4c0da2c37fd944e7c21 SHA-256: d52b8a36fd38f0e8cca3c68448072bb5f83696a2defa7f70a513f3fa91a3e931
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 0.9824

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-robux-by-watching-ads-game-hack PDF link annotation
    • http://digilib.iailm.ac.id/repository/roblox-hax_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/774-hack-roblox-jailbreak-download_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/bloxpink-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-to-download-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/promo-codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-cheat-codes_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-2021-1m-free-robux-give-away_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/get-more-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/coin-master-extra-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/how-to-get-free-hats-on-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/on-builders-club-can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-cheats-for-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/how-can-you-get-free-robux-easy_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/speed-hack-francais-roblox_GM431946152.pdfIn PDF document text
    • http://digilib.iailm.ac.id//repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://digilib.iailm.ac.id/repository/fre-robux-now_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_off000029c0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x29C0 21984 bytes
SHA-256: 4524f222d779a90475e039d890dfe574c364d71722f7301b0c25e57ce5242a78
font_01_sfnt_off00005a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5A0B 19660 bytes
SHA-256: f0cdf6166c464805662a9cde01402bcc449eb6222422d9d5af766ad530424c87

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