Malicious PDF — malware analysis report

Static analysis result for SHA-256 8aa6ccbc34b69af2…

MALICIOUS

PDF

43.1 KB Created: 2021-04-26 06:41:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: 61cd8d56f56571c0c4d8fa799d64b5a3 SHA-1: 1808607aad5aec5282140b579349e39ba53995f3 SHA-256: 8aa6ccbc34b69af2e5d33555d0ac4133d949b04f9e252529240cedd9cd57567d
160 Risk Score

Malware Insights

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

The PDF document contains multiple embedded URLs that redirect to a malicious generator site, masquerading as a game hack. The document body and heuristics indicate a lure for free game currency or hacks, a common social engineering tactic. The ML classifier strongly flags this PDF as malicious, and the presence of redirector links suggests a multi-stage attack designed to lead the user to potentially harmful content or downloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9936

Heuristics 4

  • 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.
  • 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/nuevo-hack-generador-de-robux-de-roblox-by-pignolise-game-hack In PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/fre-robux-websites.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/godmode-hacks-roblox.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-hack-peoples-accounts-on-roblox-2021.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/descargar-fly-hack-roblox.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/get-roblox-tickets-free.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-goku-hair-free.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/free-girl-skins-for-roblox.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/roblox-hack-2021-no-verification.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/do-you-want-free-robux-get-unlimited.pdfIn PDF document text
    • http://repository.poltekkesjakarta3.ac.id/repository/how-to-get-black-wings-in-roblox-for-free.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_off000042e3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42E3 29780 bytes
SHA-256: 381688a6b097d373f00bb4ef96c3a483be6f3b1018d561601a4d407f0f804598
font_01_sfnt_off00008340.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8340 19520 bytes
SHA-256: e1cffc031289bfd51741daafddbbb994c51f6ab6b20694d00396d543c345360e

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