Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5fb49e7cd1ebabd…

MALICIOUS

PDF

43.1 KB Created: 2021-05-10 23:13:04 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 06df14dc0b575a8d52d2649c34f3d1cf SHA-1: 4c17eae3380f94cea7abe2b0cc7659f84debf8c6 SHA-256: a5fb49e7cd1ebabd90dcca57fc2448403d1efa20ea673cfc5e703b9f11e7692e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that redirect to known malicious infrastructure, specifically promoting 'free generators' or 'game hacks'. The ML classifier also strongly indicated maliciousness. While no scripts were directly extracted, the PDF structure and embedded URLs suggest a phishing or scam attempt designed to lead users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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 https://netcdn.xyz/app/431946152/freerubux-game-hack In PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/free-robux-website_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/free-coins-coin-master-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-app_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/hack-de-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/roblox-girl_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-daily-free-spins-link-download_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/whats-robux_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/toolbox-apk_GM479516143.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/freespinandcoin-blogspot_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-free-pin_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/where-to-get-robux_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/earn-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/free-coins-coin-master-blog_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://elearning.matsada.sch.id/__statics/gudangsoal/files/www-coin-master_GM406889139.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
stream_003_off00004918.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4918 26972 bytes
SHA-256: db1674de5db20f67d00807dc253d73bc5a8607325b448afa326b92a5f7d00cb0
font_01_sfnt_off00008779.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8779 17872 bytes
SHA-256: f4416bbc5f287efcbe31c7b4c704cc92a0ced0ddcdd2f5cfb5fb7d41fdf7fc1a

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