Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d04c31fe803af0d…

MALICIOUS

PDF

42.5 KB Created: 2021-05-19 02:16:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: c9c2716a542f158bb92f009239acc110 SHA-1: cb717b3f52e130813b458d225b91b6c79600a288 SHA-256: 8d04c31fe803af0df27842fcbddb8df4059bbcc1c951eaf38f9534f73fbe4973
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to game hacks and free spins, impersonating Microsoft to trick users into clicking malicious links. The primary link, https://netcdn.xyz/app/406889139/free-spins-coin-master-2021-hack-game-hack, is designed to lead users to a credential phishing page. While no scripts were directly extracted, the PDF structure and embedded URLs strongly indicate a phishing campaign.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.xyz/app/406889139/free-spins-coin-master-2021-hack-game-hack.
  • 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/free-spins-coin-master-2021-hack-game-hack PDF link annotation
    • http://katalog.ireyogya.org/repository/coin-master-vip-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-on-ipad_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/easy-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-hack-mobile_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-get-infinite-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/give-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-minecraft-realms-to-join_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/minecraft-modded-client_GM479516143.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/robux-generator-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-games_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-place_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/free-robux-games-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-mod-apk-latest-version-free-download_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/coin-master-lucky-patcher-hack_GM406889139.pdfIn PDF document text
    • http://katalog.ireyogya.org/repository/roblox-hacking-website_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_off000049d1.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49D1 25344 bytes
SHA-256: 0f5b4e05168e49e876669f242882621823b4b45fb895da8c9e96f36f1398e487
font_01_sfnt_off0000835a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x835A 18456 bytes
SHA-256: a5560883dc18b22b6e1d4164516743640258d4849b8ee5f58e623da8a68570df

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