Malicious PDF — malware analysis report

Static analysis result for SHA-256 46d33d90723c72b5…

MALICIOUS

PDF

46.9 KB Created: 2021-06-11 02:37:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: a6e00b9450766ee1afc788fd0f3b0072 SHA-1: ebd5ed3b2b9aee333c76aa882234704cce1a0db1 SHA-256: 46d33d90723c72b5ad8d46d24eec81044a34196e0830140e58b17607c3f10f8e
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF document contains a lure for a 'free Robux generator' and links to a redirector URL. It also displays a fake CAPTCHA to trick users into further interaction. The embedded URLs suggest a phishing or scam attempt, likely leading to credential harvesting or further malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/free-robux-generator-roblox-game-game-hack PDF link annotation
    • https://library.fdk.ac.id/repository/free-now-for-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/instant-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/como-hackear-conta-de-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-codes-may-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-xbox-one-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hacks-that-work_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-roblox-valid-2021-codes_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/robux-infinitos-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spins-coin-master-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-gift-card-online-free_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spins-in-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/2021-robux-hack-inspect-element_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-mods-download-free_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/robux-hack-pastebin-fast_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hacks-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/pokemon-go-free-event-box-april-2021_GM1094591345.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-stuff-in-roblox-catalog-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/claim-free-robux-game-roblox_GM431946152.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
font_00_sfnt_off0000509d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x509D 24844 bytes
SHA-256: 90924aedccd2528daf728da9d6e02f447c2cf8201f1abe476e928c993bb0f413
font_01_sfnt_off00008998.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8998 2832 bytes
SHA-256: 77ae1c4cffa647a8fd533dfa4102e94364989f9e80b9cd131876e9d1005899a2
font_02_sfnt_off00009349.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9349 18680 bytes
SHA-256: 59fbd5f7434468be8d7b39e2e3f0da1bb09df7b35cab3e9d7be72bc0d50e7166

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