Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc44be6c7b7a5cb3…

MALICIOUS

PDF

48.0 KB Created: 2021-04-09 00:06:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: c5a1a1b278b9484de7898b5edab64d0d SHA-1: 0f4d221f63cab05b2800ec39c60945afecc4efed SHA-256: dc44be6c7b7a5cb36293cb8a3c32a63a857304d41b5929cafd557ec5ab7b54a9
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution T1071.001 Web Protocols

The PDF document contains a high-severity heuristic indicating it's a game hack lure, impersonating Microsoft to trick users into clicking a malicious URL. The ML classifier also flagged this PDF as malicious with high confidence. The embedded URL and document body text strongly suggest a phishing or credential harvesting attempt, potentially leading to further exploitation.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9982

Heuristics 6

  • 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.
  • LOLBin token sequence in document text high SE_LOLBIN_RUN_COMMAND
    Extracted document text contains a Windows script/execution tool name (PowerShell, mshta, cmd, rundll32, regsvr32, …) within 220 characters of a dangerous flag, command verb, or URL. This is a visible 'run this' instruction in HTML/PDF/RTF lure bodies, or — in macro-laden Office files — the macro's own string-pool entries appearing adjacent in extracted text.
  • 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://gaminggenerator.org/app/431946152/roblox-exploits-hacks-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://gaminggenerator.org/app/431946152/roblox-exploits-hacks-game-hack PDF link annotation
    • http://bestmaids.co.uk/images/how-to-get-pants-not-by-roblox-free.pdfIn PDF document text
    • http://1a-vermietung.com/images/my-roblox-girlfriend-cheated-on-me.pdfIn PDF document text
    • http://brandyourbody.com/images/fly-cheat-2021-roblox.pdfIn PDF document text
    • http://accesslabs.ca/images/free-robux-javascript-2021.pdfIn PDF document text
    • https://piscinasmundoacuatico.com/images/free-robux-no-survey-xbox-one.pdfIn PDF document text
    • http://rzt.com.ua/images/youtube-roblox-jailbreak-hack.pdfIn PDF document text
    • http://3dmedicus.ru/images/free-roblox-gui-place.pdfIn PDF document text
    • https://piscinasmundoacuatico.com/images/free-robux-and-tix-generator-no-survey.pdfIn PDF document text
    • https://amatq.ca/images/free-robux-codes-28.pdfIn PDF document text
    • http://tegeler-segler.de/images/free-40-robux-survey.pdfIn PDF document text
    • http://arcnjournals.org/images/free-robux-no-human-verification-2021-working.pdfIn PDF document text
    • https://schulzpressetext.de/images/how-robux-for-free.pdfIn PDF document text
    • http://www.awakeningtruth.org/images/free-robux-by-watching-videos.pdfIn PDF document text
    • https://avn.kz/images/how-to-make-free-robux-2021.pdfIn PDF document text
    • http://elize-photography.co.za/images/free-robux-cmd.pdfIn PDF document text
    • http://ims-77.fr/images/free-robux-no-vireus.pdfIn macro / runtime command snippet
    • https://www.ghknights.org/images/how-to-get-robux-for-free-without-builders-club.pdfIn PDF document text
    • http://logisticgroup.co/images/descargar-roblox-hackeado-para-android-robux-gratis-infinitos.pdfIn PDF document text
    • https://www.iadh.bi/images/roblox-change-date-of-birth-hack.pdfIn PDF document text
    • http://safetin.ru/images/free-roblox-codes-june.pdfIn PDF document text
    • http://1a-vermietung.com/images/my-roblox-girlfriend-cheated-on-In PDF document text
    • http://arcnjournals.org/images/free-In PDF document text
    • https://www.ghknights.org/images/how-to-get-In 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_off00005f8f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5F8F 26048 bytes
SHA-256: 14ff5169a4d58b846e88488e617b864c63af2c8548a19dae9b471e7cef2ce1a2
font_01_sfnt_off00009b0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9B0F 17864 bytes
SHA-256: e18bab58ec814f479431f998b1ef8f6d12e745f870f5d210ab9e6e1a15881045

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