Malicious PDF — malware analysis report

Static analysis result for SHA-256 5651612dc22cf62f…

MALICIOUS

PDF

34.0 KB Created: 2021-07-05 18:35:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2c16e6a0efbc5dd1144b78c4cb459ccb SHA-1: ad2f52f41d2a5fa20440afc8f901cda8059029c2 SHA-256: 5651612dc22cf62f28bdc8e6bb73e9c7b69c8a3f08fc7f68f469f28e1d897c69
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that lead to a known malicious redirector infrastructure, specifically advertising 'Coin Master Free Spin' hacks. The document body and embedded URLs strongly suggest a social engineering lure to trick users into visiting potentially harmful websites. While no scripts were explicitly extracted, the nature of the links and the lure indicate a phishing or scam attempt.

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-free-spin-ml-game-hack In PDF document text
    • https://library.sman1berau.sch.id/repository/coinmaster-hack_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/jailbreak-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/tiktok-free-views_GM835599320.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/toolbox-mod_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-app-hacks_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-hack-obc-in-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-pc-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robuxmatch-com-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-download-pc-free_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-redeem-code-free_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/5-roblox-edit-this-cookie-hacks_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/cheat-roblox-prison-brak_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hacker-shirt-for-free-roblox_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-java-free-account_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-shirts-templates_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-and-spins-link-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/hack-roblox-players_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_off00002f30.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F30 22852 bytes
SHA-256: 03ad36d038767bf9b975e1e2cc0f5e9a3fff73b7a0734fefc7ebcdc9402018b3
font_01_sfnt_off00006245.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6245 18248 bytes
SHA-256: c18038b999a15e068e0fcec6b3cb299d21e05aa15a09c32d3b19c8c95a871ee0

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