Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f8c8435efde44f9…

MALICIOUS

PDF

33.5 KB Created: 2021-06-20 00:20:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: aaa9dc12002a8c16721a7cc282e61db3 SHA-1: be94b18be86ce4cf4b1e8f6239e94ff76e0066e8 SHA-256: 4f8c8435efde44f9e301c458e83f54d25384f41cdb1b18e74a0adab828ca1182
160 Risk Score

Malware Insights

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

The PDF contains embedded links that are identified as malicious redirectors, specifically targeting users with lures for game hacks and currency. The primary URL, http://netcdn.co/app/431946152/dll-cheat-roblox-game-hack, is a critical indicator of malicious intent, likely serving as a gateway to download further malware. The ML classifier also strongly flagged this PDF as malicious.

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/dll-cheat-roblox-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/yt-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-no-apps-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/blogspot-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/robux-boost_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/pubg-uc-yollama_GM1330123889.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/jailbreak-roblox-money-hacks_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-shield-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-daily-free-spins-today_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-get-free-spins-on-coin-master-without-waiting_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hacks-para-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-to-make-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/how-to-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-roblox-acouts-full-with-robucks_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-and-spin_GM406889139.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_off00002dfb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DFB 21708 bytes
SHA-256: 36b78aee54920f4e21006a2d01ebd4e8022e5b29d946573f6c1cb5fb48f40b8e
font_01_sfnt_off00005dde.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DDE 18924 bytes
SHA-256: 64d1eea677e69a216882c3cb0dd01ed4e5c3cab849d4854f65bbb8cfa2e1b01f

Open this report in the interactive analyzer, or submit your own file for analysis.