Malicious PDF — malware analysis report

Static analysis result for SHA-256 65ceb24b9cf4c2a4…

MALICIOUS

PDF

34.1 KB Created: 2021-06-19 09:13:25 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 8f53cac690e4f3c37285c5f76def1342 SHA-1: ba56020e969f3a6651999c35cdae4e7d4ade8c3a SHA-256: 65ceb24b9cf4c2a40c7599be1febd33e9482664b6305af3471d24314849899ba
160 Risk Score

Malware Insights

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

The PDF contains a lure for game hacks and redirects to malicious infrastructure. The embedded URL points to a known malicious redirector, which likely serves as a gateway to further malicious content or exploits. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/safe-hacks-for-roblox-game-hack In PDF document text
    • http://hk-kan.org/images/coin-master-gold-cards-free-2021_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-2021-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/free-robux-now_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/roblox-hacked-version_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/download-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/free-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-roblox-hack-for-apocoleps-rizing_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/best-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-get-spins-for-free-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/cheat-codes-for-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/haktutsin-2021-09-coinmaster50freespinandcoinlinkhtml-m-1_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/bux-gg-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/apoc-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://hk-kan.org/images/how-do-you-install-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spins-and-coins-for-today_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/links-to-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://hk-kan.org/images/coin-master-free-spin-now_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
font_00_sfnt_off00002f6a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F6A 22396 bytes
SHA-256: 5a0bb1cd14654a9e5bed1808c084a6ababa73c64136a62f9a8de5dcda90b602d
font_01_sfnt_off00006150.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6150 18636 bytes
SHA-256: f3f39a70a8767302dd9aff0f6e8b5a97c8f1487ca83fbe4f7855f8b6f8926c90