Malicious PDF — malware analysis report

Static analysis result for SHA-256 a9929d19226c936f…

MALICIOUS

PDF

45.6 KB Created: 2021-05-11 00:01:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 361c94db3b3ab8d1e51c46c3d57a878b SHA-1: 800f19f11b72d4c6901cd295e613c43d3d700fbc SHA-256: a9929d19226c936f45d7d578ed302a3dbedc4ade8a45880691be046072023686
122 Risk Score

Malware Insights

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

This PDF document employs a lure related to 'free Roebucks on Roblox' to trick users into clicking a malicious link. The link redirects to a page that presents a fake CAPTCHA or human verification prompt, likely intended to trick the user into executing further malicious actions or downloading a payload. No scripts were extracted from this sample, limiting the analysis of direct execution vectors.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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.xyz/app/431946152/how-to-get-free-roebucks-on-roblox-game-hack PDF link annotation
    • https://dirigentigiustizia.it/images/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-link_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-link-daily_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hack-minecraft_GM479516143.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/robux-hack-tools_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/hacking-apps-for-roblox_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-bling-bling-card-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-hack-download_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/link-for-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-100-spin-hack_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-robux-no-verification-no-download_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/how-to-get-robux-easy_GM431946152.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/free-spin-link-for-coin-master-haktuts_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-hack-pro-gamers_GM406889139.pdfIn PDF document text
    • https://dirigentigiustizia.it/images/coin-master-free-spins-hack-without-human-verification_GM406889139.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
stream_003_off00004ae5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AE5 24952 bytes
SHA-256: fc4f21ee061a0a380a1a79477752c59638e7840b1a72b77528dabc3b96a96621
font_01_sfnt_off00008258.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8258 3884 bytes
SHA-256: 40b61f8938bd710dc29dc58ba3fde91c245a6a69596ec569b4d27c769ca417cf
font_02_sfnt_off00008f00.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F00 18524 bytes
SHA-256: b7643ab87c6ede69648f322cd81a197be2475f7126f117e622ee98ccb7431d7c

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