Malicious PDF — malware analysis report

Static analysis result for SHA-256 420ef28c71c4b548…

MALICIOUS

PDF

34.5 KB Created: 2021-06-20 05:00:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: c1762136d81c015196ada188dcf101b6 SHA-1: 99c5dde6d763bd291317a1b7360b78723c0404a7 SHA-256: 420ef28c71c4b548d9172f7868e16c14846ac27369568051d0d9fd1b8e2942cf
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 'game hacks' and 'free robux'. The document body and heuristics indicate a lure to download potentially unwanted software or malware by clicking these links. No scripts were extracted, but the presence of malicious redirectors and download lures strongly suggests a malicious intent.

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/roblox-accounts-hacken-game-hack In PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-free-unblocked-download_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/google-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/minecraft-hacked-apk_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/pizza-place-roblox-hack_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/game-hunters-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-2021-android_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-hack-a-minecraft-server_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/top-ten-ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/minecraft-hacks-for-2b2t_GM479516143.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-get-free-robux-by-playing-games_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/free-shirt-templates-roblox_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/blogger-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/how-to-cheat-in-robux-2021_GM431946152.pdfIn PDF document text
    • http://smkn1salatiga.sch.id/library/repository/get-free-robux-pin-2021_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 3

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_off000030d5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D5 22108 bytes
SHA-256: 2ff7437337849cfd3d804ce67e7a4b3e6648adf0d9ba92b14dd260d6af2296b0
font_01_sfnt_off00006207.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6207 18900 bytes
SHA-256: 5fd36ff48ef5f6f810887a7409d49c54e5b91ecbd37e6c482490cb5a9ebc4d0e

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