Malicious PDF — malware analysis report

Static analysis result for SHA-256 bc9ae89f7b2785de…

MALICIOUS

PDF

36.2 KB Created: 2021-07-04 16:10:10 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-16
MD5: 65e6fb2abf6c3b95e42a29701d4cae3e SHA-1: 2761634cae54352bcb4f65871a1bcec988970088 SHA-256: bc9ae89f7b2785de43f4a648598800ae725543bada3fd0fdc2dcc3deb369fe77
160 Risk Score

Malware Insights

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

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting game hacks and free generators. The ML classifier strongly indicated maliciousness, and the presence of multiple redirector links suggests an attempt to lead the user to a compromised or malicious website. No scripts were extracted, but the document's structure and embedded URLs point to a social engineering lure for potentially harmful content.

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/legitimate-coin-master-free-spins-apk-game-hack In PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/free-expert-sripters-roblox_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-how-to-get-free-items-in-game_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-free-stuff_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/free-spins-for-coin-master-on-1-19-19_GM406889139.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/mod-menu-hack-roblox_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/minecraft-dungeons-free-download-pc_GM479516143.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/how-to-get-free-teeth-in-sharkbite-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/free-robux-really-works-2021_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-free-robux-player_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/android-1-hack-roblox_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/scp-site61-roleplay-hack-script-roblox_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/coin-master-hack-2021-app-download_GM406889139.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/irobux-fun-roblox-online-hack_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/how-to-get-free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/oprewards-com-earn_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/hack-mot-de-passe-roblox_GM431946152.pdfIn PDF document text
    • https://www.e-learningman16jakarta.com/__statics/gudangsoal/files/roblox-como-tener-robux-gratis-2021-enero-nuevo-hack_GM431946152.pdfIn PDF document text
    • https://e-learningman16jakarta.com/__statics/gudangsoal/files/easy-robux-generator_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_off00003588.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3588 23304 bytes
SHA-256: 57d948ab23a12ffb228a529e6936769e2122136753cf32e2b6c05bf134bd0e3b
font_01_sfnt_off00006a2a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A2A 18604 bytes
SHA-256: b87cbd5be08026ebd281dd8519d989efc4945d4df70191f854a349f55fed381b

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