Malicious PDF — malware analysis report

Static analysis result for SHA-256 d11dc3712a2e37b7…

MALICIOUS

PDF

42.3 KB Created: 2021-05-12 17:40:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-22
MD5: 58c62ddd6f3fbf823da4685957f215f0 SHA-1: 6cc34050c064a5126e8622e229f1d813990f239e SHA-256: d11dc3712a2e37b7f0ed571bdf1639e7741b2979f5fe4822bd67113353fb5151
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a malicious redirector, disguised as a 'Coin Master Hack Tool' download. The presence of a visual download button and the lure of free game hacks indicate a social engineering tactic to trick users into clicking malicious links. While no scripts were explicitly extracted, the PDF structure itself facilitates the redirection, likely leveraging JavaScript for the exploit.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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/406889139/coin-master-hack-tool-v1-9-download-free-game-hack In PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coinmaster-rewards_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-free-spins-promo-code_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-apk-android-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-inappropriate_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/get-free-robux-info_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-robux-ad_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/mcpe-master-free-coins_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/free-roblox-avatar_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-app-2021_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-hack-2021-app_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/fighting-free-card-coin-master_GM406889139.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-avatar-editor-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/roblox-dominus-free_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/robux-adder_GM431946152.pdfIn PDF document text
    • http://www.pustaka.pn-calang.go.id/repository/coin-master-gold-cards-free_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_off000047a5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x47A5 25152 bytes
SHA-256: ae540208821dbbb21be5219c8b261379a2e13f9381998d1142534a380f827933
font_01_sfnt_off0000815e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x815E 18864 bytes
SHA-256: f6546c931e30ebe5b0f44735796ae8f725f630439fc19eae70f9e7cc234a2321

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