Malicious PDF — malware analysis report

Static analysis result for SHA-256 6241a2850bb5c90a…

MALICIOUS

PDF

45.6 KB Created: 2021-05-13 00:10:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 92ddbaa78298554bcc66395fef4927d6 SHA-1: 2f4dcb28b0fd179d31d90ba80c3dc8e0085fb52a SHA-256: 6241a2850bb5c90a7a719db8b30e16fbd450a49977bac504cad8b6cf4df53880
200 Risk Score

Malware Insights

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

The PDF contains lures for free Robux and game hacks, impersonating eBay, and directs users to a malicious redirector. The embedded URL, https://netcdn.xyz/app/431946152/free-robux-no-verification-2021-ios-game-hack, is a known malicious redirector. The document's structure and content suggest it's designed to exploit user interest in free in-game currency or cheats to lead them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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-2021-ios-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
  • 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-2021-ios-game-hack In PDF document text
    • http://www.elibrary.perludem.org/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/real-roblox_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-hack-without-verification-or-downloading-apps_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-daily-free-spins-link-today-haktuts_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-spin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-minecraft-premium-account_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/roblox-hack-download_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/coin-master-heaven-free-spins_GM406889139.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/coin-master-apk-hacked-3526_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/coin-master-hack-version-2021_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-coins-in-mcpe-master_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/how-to-get-free-spins-on-coin-master-ios_GM406889139.pdfIn PDF document text
    • http://elibrary.perludem.org//repository/minecraft-java-edition-free-download_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://elibrary.perludem.org/repository/minecraft-logo-maker-free_GM479516143.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/robux-codes_GM431946152.pdfIn PDF document text
    • http://www.elibrary.perludem.org/repository/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://collectrobux.coIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004cde.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CDE 27944 bytes
SHA-256: 0bcf2b843901b2fa4620dc1b8cd4e0ca65fa6131ecee40a70b62c1fe348976c3
font_01_sfnt_off00008dee.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8DEE 19004 bytes
SHA-256: 57c461ba4099b7c3a729e07f809cac2bd0540fe115d61d2f21d5ca70446f19e8

Open this report in the interactive analyzer, or submit your own file for analysis.