Malicious PDF — malware analysis report

Static analysis result for SHA-256 89e6a6126a3a8887…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 05:44:02 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 2c621d0786eb0d28d0e14764d3c5dbde SHA-1: ac01791f3dfc3b98cb629dbc6f58844470022c0c SHA-256: 89e6a6126a3a8887776ef9988c0112dbc4ed02a6e7be62bedee819eed3099fd8
160 Risk Score

Malware Insights

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

The PDF file contains a lure for game hacks and free currency, which is a common social engineering tactic. It embeds a URL that points to a known malicious redirector, likely serving as a gateway to further malicious content or downloads. The ML classifier strongly indicates maliciousness, and the overall structure suggests an attempt to trick users into visiting a compromised site.

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.tw/app/406889139/coin-master-hack-mod-apk-download-game-hack In PDF document text
    • https://library.stikeswnpalu.ac.id/repository/make-your-own-minecraft-server-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-no-offers_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-shirts-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheats-for-roblox-running-simulator-2_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-glitch-working-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/cheat-names-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-cash-script-ultimate-driving-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-forsaken-sword-3-hack_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/prison-breaker-16-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-neon-district-hacker_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/coin-master-3533-android-hack_GM406889139.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/free-robux-on-phone_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-hack-on-roblox-3-simple-steps-youtube_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/hack-roblox-exploit-omgexploit_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/how-to-get-free-robux-without-waiting_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/minecraft-free-play-no-download_GM479516143.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/fps-free-games-best-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.stikeswnpalu.ac.id/repository/roblox-company-tycoon-hack_GM431946152.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_off0000323d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x323D 22868 bytes
SHA-256: 6ef4203481995c4a87608c7881322c89b36780c1ebe31091cf8f35f3e3b68c8f
font_01_sfnt_off00006552.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6552 18760 bytes
SHA-256: 8da59bb2b576fb969baa6cece68dec68f192c2005e489f6fb2bd389f048cfd07

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