Malicious PDF — malware analysis report

Static analysis result for SHA-256 da421a455124537e…

MALICIOUS

PDF

47.0 KB Created: 2021-06-03 06:41:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 74ed2b609e381b499a497fb8ba35a1f9 SHA-1: dd051c18a935bfb1de1357d716f720bcfdfaa105 SHA-256: da421a455124537eb84632bf358d534342c40c72ce748c070da740cd20885087
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to a malicious domain, masquerading as a "game hack" generator. The presence of multiple links to similar lure content and the ML classifier's high confidence score indicate a deliberate attempt to trick users into visiting potentially harmful sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.online/app/406889139/coin-master-hack-reddit-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-items-glitch_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-20-free-spins-link-today_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/minecraft-hacks-pc_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-websites-that-actually-work-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/best-free-minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/tiktok-free-zone_GM835599320.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-human-verify_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-mod-version-free-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-without-verification_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-roblox-wings_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-robux-without-downloading-apps_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/teach-me-to-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-get-free-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-card-hack-apk_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-spin-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-food_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-free-gifts_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-rubox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off000052f0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x52F0 24628 bytes
SHA-256: 76a84a9c1a9f937de95cad171e846def82e8732da5ef13de45ff167093e886f9
font_01_sfnt_off00008bde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BDE 2880 bytes
SHA-256: b053084cafd01c649462d87667ba56c569d6480ce60e7d20ae57ef6124cf178e
font_02_sfnt_off000095c9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x95C9 17888 bytes
SHA-256: 63a6a5d9916b9ee5af7207625cec6907b74dd50493b17e0c9eae8777c3cfd91e

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