Malicious PDF — malware analysis report

Static analysis result for SHA-256 c09ca83e029232d8…

MALICIOUS

PDF

35.3 KB Created: 2021-06-28 08:03:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 3280fd52c7f33ac5cd8e2e7ef43140fa SHA-1: acd3a64730a2adf5f0662b5821455210aafa39a5 SHA-256: c09ca83e029232d8696169ca25978e2c94323c41fe35d495a7648126f851b634
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to websites that are flagged as malicious redirectors, specifically promoting 'game hacks' and 'free generators'. The document body, though partially corrupted, contains similar URLs and text, reinforcing the lure. The primary function appears to be directing users to potentially harmful sites through social engineering.

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/flame-gg-website-hack-not-roblox-game-hack In PDF document text
    • http://pustaka.fti.unand.ac.id//repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/one-for-all-roblox-free-shop-t-schirts_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-robux-free-item_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-card-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/roblox-free-robux-no-survey-no-download_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/bc-roblox-free_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-master-spin-free_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/all-free-items-in-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-gift-robux-on-mobile_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coin-master-free-coins-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/download-apps-for-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/how-to-get-free-robux-easy-hack_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id//repository/coinmaster-gps-user-review-coinmaster-coin-master-hack-pagedemo-index_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/coin-game_GM406889139.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/free-robux-2021-working_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/robux-earning-sites_GM431946152.pdfIn PDF document text
    • http://pustaka.fti.unand.ac.id/repository/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000030c5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30C5 22680 bytes
SHA-256: cc4b05c56dbe9d3c379c35880a2fe172f5bec10ed6c9da5c61dbb26282631973
font_01_sfnt_off000063b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 19500 bytes
SHA-256: 1a863ea92c5bbfed78c95205f8a0f427cfabfe342c7ed1b97acc2b9e164d6d21

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