Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a853604e08291f6…

MALICIOUS

PDF

40.8 KB Created: 2021-04-28 08:57:01 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 76731dc35405a01928f22c8134798125 SHA-1: 8cee180bb69c6057d7539641c8a8be83a415f511 SHA-256: 1a853604e08291f6fe71ef894841ab78e497f9baadae147bca8f455719e9b235
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a critical link to a known malicious redirector infrastructure. The document body, though partially obfuscated, indicates a lure related to 'game hacks' and 'free generators' for Roblox. The presence of embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt designed to redirect users to potentially malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9941

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/how-to-get-sea-star-for-free-roblox-game-hack In PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-project-pokemon-duplication-hack.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hacks-for-roblox-phantom-forces-2021.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-robux-2021-not-patched-mac.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-robux-giveaway-access-code.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/free-russian-sign-roblox-t-shirt.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/lua-roblox-hack-scripts.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/hacks-roblox-jailbreak-download.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/how-to-get-free-korblox-pets-in-roblox-magnet-simulator.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/youtube-videos-how-to-get-free-robux.pdfIn PDF document text
    • https://elearning.mtsalhuda.sch.id/__statics/gudangsoal/files/roblox-free-tbc-account.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_off00004094.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4094 26544 bytes
SHA-256: 8c9d1644ba1fcf73900c29a1f956e6efbdd267500a349cb1bc1b2d6ecedaac98
font_01_sfnt_off00007d11.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D11 18444 bytes
SHA-256: 0dd6fba4f774d69d7ee39a5203c80ad163069b9a4e3716120814e0970431c0b3

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