Malicious PDF — malware analysis report

Static analysis result for SHA-256 e10757d28a50a09b…

MALICIOUS

PDF

43.7 KB Created: 2021-05-11 18:14:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 4ded307bf68671fa86b30508858fb252 SHA-1: 32be947b6fb1bc448b237df3ffb108889526d0fc SHA-256: e10757d28a50a09ba895db3b67a67d8e5f60e37a3670bbd026c213d93d31b1b5
122 Risk Score

Malware Insights

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

This PDF document contains a lure for 'free Robux' and game hacks, impersonating PayPal. It directs users to a malicious URL, https://netcdn.xyz/app/431946152/free-robux-no-verification-or-survey-game-hack, which is likely intended to host a malicious payload or phishing page. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a download button lure further support this assessment.

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.
  • 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-no-verification-or-survey-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-no-verification-or-survey-game-hack PDF link annotation
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-spin-and-coins-free_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/robux_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-minecraft-education-edition_GM479516143.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/best-way-to-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/wwwcoin-master-free-spincom_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-moderators_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/real-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/is-roblox-free-on-ps4_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/how-to-make-your-own-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-map_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/best-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/hack-download_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/bad-minecraft-free_GM479516143.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox-hack-app_GM431946152.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/como-hack-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/free-attacks-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-hack-without-verification_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.mankotasolok.sch.id/__statics/gudangsoal/files/roblox36com-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_off00004b6b.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6B 25816 bytes
SHA-256: 218a2d7ee45a10dba1c18005defcc256ff212c4327f87312c6f2f22226f8c063
font_01_sfnt_off00008672.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8672 18892 bytes
SHA-256: 85e8471d4bb7809b16494b43ecc998cec7f87bafeaec38a3001510264e72f0e6

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