Malicious PDF — malware analysis report

Static analysis result for SHA-256 337c392284a9c813…

MALICIOUS

PDF

36.1 KB Created: 2021-07-05 20:50:24 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2bd8dfc8d1aa4001a7a2703860c41df2 SHA-1: 06cdb9e0f2838662638128c2ee11ebfbf793536a SHA-256: 337c392284a9c8134804316c2022571ff74fb9fe403fbda5cf8f762599508bb1
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one that redirects to a malicious domain advertising a "Coin Master Hack". This heuristic firing indicates the document is designed to lure users to potentially harmful websites. The presence of embedded URLs and the ML classifier's high confidence score support this assessment. No scripts were extracted from this sample.

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.tw/app/406889139/coin-master-hack-version-2021-free-download-game-hack In PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-shower-simulator-cheats_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-robux-generator_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-coin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/yt-how-download-script-hack-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/pokemon-go-free-hack_GM1094591345.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-account-hacker-tool_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/cheat-in-roblox-jailbreak-2021_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/comment-avoir-des-robux-gratuit-sur-roblox-2021-sans-hack_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-coin-link-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/roblox-hack-github-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-do-you-grt-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-working_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-app-no-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id//repository/how-do-you-get-free-daily-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-roblox-redeem-cards-live_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-games-like-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/how-to-hack-a-account-password-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/im-gonna-hack-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.poltekeskupang.ac.id/repository/free-robux-mr-robux_GM431946152.pdfIn 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_off00003463.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3463 22808 bytes
SHA-256: 29fa1a29017464ded97d09e5a623a893bfb3285c7c4546052e4ab585baa97d47
font_01_sfnt_off00006770.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6770 19284 bytes
SHA-256: 6b979adcbdcc2e94c4daeb243c50b81a9abe091d19e021ca85ec11d5b6e93cbd

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