Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ba97e2dc49e4f68…

MALICIOUS

PDF

43.9 KB Created: 2021-05-17 04:30:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: f213662f342bebbebbd33b7401cd3a06 SHA-1: c7c689f4a4fa3576dfd64d2668f73a8981953c84 SHA-256: 7ba97e2dc49e4f689c67b2f6f3d3c679ddd9d314d0440fcd40dee8f82a5fbfdd
200 Risk Score

Malware Insights

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

The PDF contains multiple links to malicious redirectors and game hack lures, impersonating the Facebook brand to trick users. The primary link, https://netcdn.xyz/app/431946152/how-to-get-free-robux-fast-and-easy-game-hack, is associated with a "free generator / game hack" scheme. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or further payload delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/how-to-get-free-robux-fast-and-easy-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/how-to-get-free-robux-fast-and-easy-game-hack In PDF document text
    • http://spentulib.com/search/repository/how-to-hack-to-get-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/spins-coin-master_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/free-robux-games-on-roblox_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/robux-hack-free-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/robux-com-free_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-hack-roblox-for-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search//repository/play-minecraft-free-online-no-download_GM479516143.pdfIn PDF document text
    • http://spentulib.com/search//repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-free-spin-and-coin-link-today_GM406889139.pdfIn PDF document text
    • http://spentulib.com/search//repository/free-robux-download_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://spentulib.com/search/repository/coin-master-unlimited-spins-apk-free-download_GM406889139.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_off0000498e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x498E 27172 bytes
SHA-256: fd807ed92a4aaf5fb7bd8f9aa8786d6f81bc71969e7e38060c6c813655117c48
font_01_sfnt_off0000875a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x875A 18864 bytes
SHA-256: 264ac3d9ee16189788a918c90b00fec891485e046f110455159a23ab28eb8c09

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