Malicious PDF — malware analysis report

Static analysis result for SHA-256 a121d5a816ada767…

MALICIOUS

PDF

34.2 KB Created: 2021-07-05 23:53:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: cebee902b4dd6f4e8a8f314a82e90e29 SHA-1: c46df265234bfd23bd0df93daa8a3a89f69cbd54 SHA-256: a121d5a816ada767072a5bc60bd87ccc2d30306b2f858c834da9094c0b32d426
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links that redirect to known malicious infrastructure, specifically promoting 'free generator' and 'game hack' lures. The embedded URLs and the document body text strongly suggest a social engineering tactic to trick users into visiting potentially harmful sites. While no scripts were extracted, the PDF's structure and heuristic firings indicate a malicious redirector designed to lead users to scam or malware-hosting pages.

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/blogspot-free-spins-coin-master-game-hack In PDF document text
    • http://perpus.masda.ac.id/repository/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-free-spins--coins-2021_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/how-can-i-get-robux_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/descargar-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-spin-coin-master-online_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/roblox-skin-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-card-collection-hack-apk_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/accessory-wings-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/hack-vampire-hunters-2-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/coin-master-hack-online-cheat_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-ninja-simulator-hack_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/free-catalog-roblox-items_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.masda.ac.id/repository/roblox-murder-mystery-2-cheat-codes_GM431946152.pdfIn PDF document text
    • http://perpus.masda.ac.id//repository/minecraft-free-download-no-virus_GM479516143.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_off000030de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30DE 22380 bytes
SHA-256: eacb3602b1c3dfdd4fec6c6487ceb398ccfbfa0fedb9452c16987899c18ac9a3
font_01_sfnt_off00006268.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6268 18464 bytes
SHA-256: 230ca97f16dd2ddf1879142f15263642e6919db147f0bcf840325c8143f28d8e

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