Malicious PDF — malware analysis report

Static analysis result for SHA-256 929ca721f76dcdac…

MALICIOUS

PDF

33.5 KB Created: 2021-06-28 03:40:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 74eb87de9448c0aa37e9e15177a906e6 SHA-1: dcec029e89959b983ae834bae8208612974e7260 SHA-256: 929ca721f76dcdace29f7cd2f38f29805cd5e5b9deed6eba65d32d816cbe0536
160 Risk Score

Malware Insights

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

The PDF contains multiple links to known malicious redirectors and sites offering game hacks and cheats, indicating a lure for users to download potentially malicious content. The ML classifier strongly flagged this PDF as malicious, and the presence of embedded URLs and a visual download button further supports a malicious intent to trick users into clicking through to harmful sites. No scripts were extracted from this sample.

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/gaming-cheats-com-robux-game-hack In PDF document text
    • http://lib.stimykpn.ac.id//repository/free-script-executor-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-in-roblox-prison-life-2021_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-coin-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/free-robux-no-verification-2021-android_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/roblox-obc-lifetime-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/coin-master-root-hack_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/easy-roblox-today_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/comment-cheat-sur-stand-online-roblox_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/minecraft-world-free-download_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id//repository/roblox-free-online-game_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/coin-master-fan-page_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-nike-roblox-shirt_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-get-free-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-accounts-with-password-and-username-for-free_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/how-to-hack-robux-on-ios_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/free-roblox-girl-outfit-codes_GM431946152.pdfIn PDF document text
    • http://lib.stimykpn.ac.id/repository/best-free-roblox-game_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_off00002e0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E0D 21604 bytes
SHA-256: e6db9fb4b2a2661ccc987e6120e511ff4d78e6d4cd1b1c384046c691026e89f7
font_01_sfnt_off00005d2e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D2E 19200 bytes
SHA-256: 29841d62c6357ca5a45abb72009055b33902067be10b06002ffc1f75ff7f95e2

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