Malicious PDF — malware analysis report

Static analysis result for SHA-256 71a3d82b1a96bbbf…

MALICIOUS

PDF

41.6 KB Created: 2021-05-19 20:54:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: cce0ef9dddbf2dc3a4eac0b6bc759f4f SHA-1: 899e4130113ddfc5e1707939b8707a423c05e562 SHA-256: 71a3d82b1a96bbbfc7d5a75167e0f2b9bdbc93f47718c5f5b9c8ec743f7ccd66
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 0.9971

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.xyz/app/1094591345/is-pokemon-go-a-free-app-game-hack PDF link annotation
    • http://learningarabic.co.uk/images/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-fan-page-free-spins_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-unlimited-spin-apk-free-download_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/app-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-roblox-hack_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-and-coins-hack_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/i-want-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/200-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-cards-2021_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/how-to-get-creative-mode-in-minecraft-server-hack_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-free-spins-usa-2021_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-freebies_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/free-robux-giveaway_GM431946152.pdfIn PDF document text
    • http://learningarabic.co.uk/images/minecraft-ore-finder-mod_GM479516143.pdfIn PDF document text
    • http://learningarabic.co.uk/images/coin-master-hack-spins_GM406889139.pdfIn PDF document text
    • http://learningarabic.co.uk/images/mcpe-master-unlimited-coins-free-download_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_003_off000048da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48DA 24596 bytes
SHA-256: b2d877ab7de1e47844fddf0f2d12a15d77869d26a4ab8f534b47cf74b980fde8
font_01_sfnt_off00008142.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8142 18016 bytes
SHA-256: b11cedc053a399e2f27066390cb699d215de9822a68089ffa4b749e5771f8f7d

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