Malicious PDF — malware analysis report

Static analysis result for SHA-256 e12de52e4e516572…

MALICIOUS

PDF

45.1 KB Created: 2021-05-14 00:02:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: ea1caa1baf775ac9983b8730743eae48 SHA-1: ee97973b127c17add6a15e78bbf64e6590c94e31 SHA-256: e12de52e4e5165728d826f938fbce8ecfcaf3e82cd458839d1a2bd76548f6ef4
122 Risk Score

Malware Insights

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

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9621

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/431946152/free-robux-codes-generator-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/431946152/free-robux-codes-generator-game-hack PDF link annotation
    • http://www.notaioricci.it/images/free-spin-link-in-coin-master-game_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-without-offers_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-free-spins-hack_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-survey_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-no-apps_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-minecraft-mods-for-xbox-one_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/minecraft-ps4-free_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-spin-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/coin-master-coins-free_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/how-to-get-free-robux-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-spins-coin-master-links-thursday-november-28-2021_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/free-robux-discord_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/moon-active_GM406889139.pdfIn PDF document text
    • http://www.notaioricci.it/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.notaioricci.it/images/robux-free-2021_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
stream_003_off0000489c.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x489C 25204 bytes
SHA-256: cc8108659dbd7439272a9f67477c541f044e1b917c6288353674f3a041c63878
font_01_sfnt_off00008302.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8302 2912 bytes
SHA-256: 02b35010e2614e3cc95ac6414c49295350c91fdfcc4b4cad27ffdbc10e80df7f
font_02_sfnt_off00008cff.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CFF 18520 bytes
SHA-256: 1c25fc10cbc7d9d0374bcdf27ae43ed9c15c29ea4d1fc113120e8f54655ee57b

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