Malicious PDF — malware analysis report

Static analysis result for SHA-256 521ad214e5cc9ef4…

MALICIOUS

PDF

53.7 KB Created: 2021-06-11 08:06:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26c6b05dc56043a39d93f05194431420 SHA-1: ae8aff66e57dccaafc6a0d1dd75338d7a538389a SHA-256: 521ad214e5cc9ef48fc123eace102a61fa5315814448491b0662d42480f832dd
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and infrastructure, disguised as 'game hacks' or 'free generators'. The primary lure is for Roblox-related cheats, aiming to trick users into visiting these malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly indicate a phishing or redirection attack pattern.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9858

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-hackear-robux-en-roblox-2021-facil-y-rapido-game-hack In PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/btools-roblox-hack-2021-unpatchable_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/roblox-good-pet-ranch-accounts-free_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/free-robux-generator-2021-download_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/free-list-of-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/robux-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/descargar-hack-roblox-2021_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/roblox-magnet-sim-hack-script_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/triga-cheat-engine-for-roblox_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/how-long-for-robux-hack-to-get_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/free-minecraft-capes_GM479516143.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/how-can-you-get-free-robux-on-laptop-on-roblox_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/free-body-roblox_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/unpatched-cheat-engine-roblox-pokemon_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/coin-master-free-cards_GM406889139.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/minecraft-java-edition-code-free_GM479516143.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/ben-10-universal-showdown-cheats-roblox_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/free-account-roblox-obc-2021_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/free-roblox-birthday-printables_GM431946152.pdfIn PDF document text
    • https://2020.innscidsp.com/wp-content/uploads/fsqm-files/roblox-robux-hack-2021-october_GM431946152.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
font_00_sfnt_off0000537f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x537F 40348 bytes
SHA-256: cb2bd3762254fbace7b2afb09a9b213d34b3f8e316c7e904a81bd6194150f4e6
font_01_sfnt_off0000ab92.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAB92 19780 bytes
SHA-256: 8aea03434204510a2de2097f113cc19a84021c56ce2b5a349add9029f46b88d7

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