Malicious PDF — malware analysis report

Static analysis result for SHA-256 f7ca596cd4f88464…

MALICIOUS

PDF

36.2 KB Created: 2021-06-26 18:53:27 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 169181b2e4b6bde6b32dbf426c0e2084 SHA-1: e807a5136c31daabfd9ed690cd7108c2c5686b29 SHA-256: f7ca596cd4f88464e67e729ab00f6b929e9753445b89db9b279c17fe2e4b65f8
160 Risk Score

Malware Insights

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

The PDF document contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generator / game hack' content. The ML classifier also flagged this PDF with high confidence. The primary attack pattern involves luring users with promises of in-game currency or cheats, which is a common social engineering tactic to drive traffic to malicious sites. No scripts were extracted, but the embedded URLs are the main indicators of compromise.

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/how-to-get-free-robux-2021-2-4-game-hack In PDF document text
    • http://pustaka.ust.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spin-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-app_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-spin-coin-master-2021-link_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-make-a-developer-product-free-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-real-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/coin-master-daily-free-spins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-roblox-pour-rcupe-nos-compte_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/www-claim-gg-to-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/free-robux-generator-without-verify_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/hack-compt-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/mad-shitter-roblox-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-much-robux-can-you-get-with-1-million-dollars_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/lazyblox-com-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-hack-pepoles-roblox-account_GM431946152.pdfIn PDF document text
    • http://pustaka.ust.ac.id/repository/how-to-get-free-robux-2021-2-4_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off00003492.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3492 22596 bytes
SHA-256: 2c5a4e736744672647deeea5cd21af5edce57d1417a33961d06dbf8c21dda3b5
font_01_sfnt_off00006708.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6708 19448 bytes
SHA-256: 9dc699e886f51a4dfebf09941148cfcc3557c71209db762cdd3f877aa94b54b4

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