Malicious PDF — malware analysis report

Static analysis result for SHA-256 88600b3d28997aaa…

MALICIOUS

PDF

40.7 KB Created: 2021-05-18 05:02:51 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 0f050b0932b9ce0ff7bb17a9f9016c97 SHA-1: 9a26df4ac33774941f65c87ce9520313c55042c4 SHA-256: 88600b3d28997aaa1f6b28a5f35743a37d442af61936b4076fd48600d5875d3e
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains embedded links that redirect to malicious infrastructure, specifically promoting 'free Robux' and game hacks. The primary link, 'https://netcdn.xyz/app/431946152/to-get-free-robux-game-hack', is identified as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and heuristics indicate a lure designed to drive 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/to-get-free-robux-game-hack In PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-how-to-get-japan-sushi-card-free_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/minecraft-xbox-one-free_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/earn-robux_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/multiplayer-master-hack-coins_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-hack-without-human-verification-2021_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-villages_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/how-do-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-deutsch-download-ios-link_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-spins-and-coins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-roblox-toy-codes-2021_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/real-roblox_GM431946152.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/coin-master-free-spins-link-download-for-iphone_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/ear-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/free-coin-master-spin-and-coin-link_GM406889139.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/minecraft-realms-free-codes_GM479516143.pdfIn PDF document text
    • https://elearning.masultanhadlirin.sch.id/__statics/gudangsoal/files/roblox-free-items_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
stream_003_off00004679.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4679 23988 bytes
SHA-256: baa13fc99b255074ddd811dc1fad0ddc639c616128d3621624d8ca52c8255696
font_01_sfnt_off00007d0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D0B 18120 bytes
SHA-256: 5233d5aad1bcdd77905869674ceee15891b0fc77671f16174d37808cf9f58ee1

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