Malicious PDF — malware analysis report

Static analysis result for SHA-256 f57069de8cfa36d6…

MALICIOUS

PDF

35.1 KB Created: 2021-06-25 14:47:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 050fbca474f4e4c392fab7933bd19815 SHA-1: af521d67bda5a05d197cec4de779cb9297fb8ad6 SHA-256: f57069de8cfa36d647024620d398a67af2ab781062c0071709b59845990d3a11
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to redirector infrastructure, specifically advertising 'free Robux' and 'game hacks' to lure victims. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-how-to-get-free-robux-on-roblox-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings strongly indicate a phishing or scam attempt, likely leading to further malicious content or malware download.

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/roblox-how-to-get-free-robux-on-roblox-game-hack In PDF document text
    • http://repository.unla.ac.id/repository/coin-master-free-spins-link-2021-april_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hackaron-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-giver_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-safe_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/robux-survey_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/what-is-my-robux-promo-code-for-free_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-to-hack-coin-master-cheat-engine_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-atravesar-paredes-roblox-2021-marzo_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/a-modded-day-hack-roblox_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/coin-master-pc-hack-tool_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/all-coin-master-spin-link-and-free-download_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/hack-coin-master-without-human-verification_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/how-can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/minecraft-items_GM479516143.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-coin-master-spins-link_GM406889139.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/roblox-one-piece-millenium-hack-script_GM431946152.pdfIn PDF document text
    • http://repository.unla.ac.id/repository/free-robux-generator-and-v-bucks_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000031b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31B0 22528 bytes
SHA-256: 84e98b10bda00c8e1855b87cfeca2c921dcf9c6715bb48e0888572a8218353f1
font_01_sfnt_off00006400.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6400 19056 bytes
SHA-256: eacde75f1544162605d026bf0108f0874b32c69617953f6b10717fb9b90e6e6a

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