Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1856940e6ccdbbc…

MALICIOUS

PDF

43.4 KB Created: 2021-05-15 02:32:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 48f4211cf9a1d860ba4647124d2ccf63 SHA-1: c49836b502f7b810406034ff232463dcf1e367bb SHA-256: a1856940e6ccdbbce050b15b8213017ae490df4d1c6a1c0e1e0dfe4c43f9e37c
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector, and also displays a fake CAPTCHA to trick users. The embedded URL and numerous other URLs point to sites offering game cheats or virtual currency, reinforcing the lure. While no scripts were explicitly extracted, the PDF structure and its embedded links suggest it's designed to redirect users to malicious sites, potentially for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/406889139/coin-master-free-gold-cards-link-2021ee-spins-game-hack PDF link annotation
    • http://www.alrashed-alsaleh.com/userfiles/files/comapp-trekfree-coin-spindaily-link-master_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-rewards_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-spin-trick_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/give-me-free-robux_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-accounts-2021_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-spins-deutsch-download-2021-link_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-shirt-roblox_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/daily-coin-master-free-spin-link-facebook_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-rewards-coin-master_GM406889139.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/how-do-you-get-free-roblox_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • http://www.alrashed-alsaleh.com/userfiles/files/apps-that-give-you-free-robux_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
stream_003_off00004b44.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B44 25416 bytes
SHA-256: 5848f134fd80dc6c344abd858c622e84caf895b1f337baac75768bc5b9a7772a
font_01_sfnt_off0000862b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x862B 18704 bytes
SHA-256: f217188fa6de56430050db09e90b84fdd9e70e551a4c5ae968f6563144bdfb18

Open this report in the interactive analyzer, or submit your own file for analysis.