Malicious PDF — malware analysis report

Static analysis result for SHA-256 5e79a7f33fe576b2…

MALICIOUS

PDF

46.5 KB Created: 2021-06-08 12:45:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 70d8d04db5d050a751e6a8bbebf02c87 SHA-1: 099e45f0ca3b0a7da879c31fea9a52d9b8ec45ad SHA-256: 5e79a7f33fe576b215cd58dd46893a959fbb64b8926529fed23da73dd2e1c871
100 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a lure for free Robux and a visual download button, directing users to a known malicious redirector. The ML classifier also flagged this PDF with high confidence. While no scripts were extracted, the embedded URL is a primary indicator of malicious intent, likely leading to a second-stage download or phishing page.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9832

Heuristics 3

  • 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/free-robux-codes-to-get-22.500-robux-game-hack In PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-youthnow_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-without-verification_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-mojang-account-with-minecraft_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-premium-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-group-payouts_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-com-roblox_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-minecraft-for-free-on-xbox-one_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-hack-pw_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/114-hacks_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-apk_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robuxlove-net-free-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-do-you-earn-robux_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-people-girl_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-get-100-robux-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-gift-card-generator_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_004_off000051cc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x51CC 27364 bytes
SHA-256: b91cf5f2f80cd5a8e5857a3cac64d128400bc44d312068934cfdb5e8695489b9
font_01_sfnt_off000091a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x91A5 18788 bytes
SHA-256: 2fac6655759f89ab4dbe645a4d97cc89a86bba21e22186ce8b4de00d26eb558c

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