Malicious PDF — malware analysis report

Static analysis result for SHA-256 57017aecb86b11c0…

MALICIOUS

PDF

35.6 KB Created: 2021-06-27 07:33:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 26783e0dfa4009acb2c9d32adcfb5d41 SHA-1: aa5229e760058ef26f2f60722ca9fb691eedbcef SHA-256: 57017aecb86b11c0e0c3f4add2fb52a00a3a81ecf8109b74525274c022e273cc
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure related to 'free Robux' and 'game hacks' to entice users to click on embedded links. The primary link redirects to known malicious infrastructure, suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links indicate a malicious workflow designed to lead users to potentially harmful content or further exploitation.

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.co/app/431946152/free-robux-android-app-game-hack In PDF document text
    • https://lib-stie.yai.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-spins-only_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/gift-card-generator-hack-robux-codes-hot_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/gamepass-roblox-free_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-hack-someones-roblox-account-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/synapse-free-roblox_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-2021-no-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-promo-codes-for-robux_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/how-to-get-free-robux-no-verification_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/redeem-roblox-virtual-item-free-codes-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-robux-discord_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/what-is-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/free-unlimited-no-wait-robux-february-2021_GM431946152.pdfIn PDF document text
    • https://lib-stie.yai.ac.id/repository/shcr-injector-roblox-free_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
font_00_sfnt_off0000327a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327A 22876 bytes
SHA-256: f55d49a0867ef3dc2698b206543b305487c61876eaa4620a6f62fcc3a8e20d47
font_01_sfnt_off00006594.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6594 19184 bytes
SHA-256: c73f6efabe8345a237a54de4247daa44ee4db3b3da20636d2d56a94e6ed62338

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