Malicious PDF — malware analysis report

Static analysis result for SHA-256 d8e1399f4cd6f282…

MALICIOUS

PDF

45.0 KB Created: 2021-05-15 12:56:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 6124a1e03e8b845228887d8b44f641be SHA-1: d1c14af12ebbbdecf034c48aba4c7a3e2c9d08a1 SHA-256: d8e1399f4cd6f28296e0926d23bad61dbb6d48c013dc7f1073f5f558ec9d5782
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 0.9632

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/479516143/how-to-get-minecraft-for-free-on-xbox-one-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/479516143/how-to-get-minecraft-for-free-on-xbox-one-game-hack PDF link annotation
    • http://www.ma-plast.hr/files/minecraft-hack-client-download_GM479516143.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-no-human-verification-2021_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/coin-master-free-daily-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-minecraft-gift-codes_GM479516143.pdfIn PDF document text
    • https://www.ma-plast.hr/files/show-me-how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/free-pet-food-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/master-coin-hack-apk_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-free-daily-spins-link_GM406889139.pdfIn PDF document text
    • https://www.ma-plast.hr/files/free-robux-co_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/hack-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/coin-master-hack-tool-apk-download_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/get-free-robux-today_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-get-free-robux-without-verifying_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.ma-plast.hr/files/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • https://www.ma-plast.hr/files/how-do-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ma-plast.hr/files/how-to-make-robux-on-roblox_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_off00004b05.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B05 24668 bytes
SHA-256: f103b712bd9db0ec689c7132e59017daace4c6e6c8a7c46c1e2ef4150b67d84c
font_01_sfnt_off00008339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8339 2820 bytes
SHA-256: 96a70491b0783ad8c6fc9b11a18f021aa22c69ac41ee4499b781d16a1b99b689
font_02_sfnt_off00008cda.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CDA 18472 bytes
SHA-256: 63446f7755945d37ec8b97d22fda434cb08cbf4c61a02f7f94d2af605f03b611

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