Malicious PDF — malware analysis report

Static analysis result for SHA-256 b1d1bdbe16c78142…

MALICIOUS

PDF

45.6 KB Created: 2021-06-09 09:54:08 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ad06a42fb83fbe9544cdbe902c8d5b48 SHA-1: a703608be0380f8fc8fd70015b5e36b2467b50a1 SHA-256: b1d1bdbe16c7814270a55ff45a09860e7758536b8487a375c959e94dba320223
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links that redirect to malicious infrastructure, disguised as game hacks or generators. The primary redirect URL is https://netcdn.tw/app/431946152/como-instalar-hacks-roblox-game-hack, which is flagged as a known malicious redirector. The document body and embedded URLs suggest a lure for users seeking cheats or free items for games, leading them to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/como-instalar-hacks-roblox-game-hack In PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-quora_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/robuxglobalcom-no-verification_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-minecraft-alts_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-spin-coin-master-hacktoman_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-minecraft-for-free-on-laptop_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-spins-and-coins-unlimited-free-download_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/hacked-client-for-minecraft-bedrock_GM479516143.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-2021-robux-for-free_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/real-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-coins-for-coin-master-blogger_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/spin-link_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/lazyblocks-com-free-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/roblox-pics_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/free-coins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/i-want-robux_GM431946152.pdfIn PDF document text
    • http://elib.acls-indonesia.com/repository/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off00005097.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5097 27068 bytes
SHA-256: aa4470261522e53d2eb7631785086354faf90c70a8d1707f87c984c308c37f22
font_01_sfnt_off00008ebc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EBC 18548 bytes
SHA-256: cd043cd591c9cf7d28c7efd848dc4bfb82e27a3bdd1da600c8bc5813cf704ff3

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