Malicious PDF — malware analysis report

Static analysis result for SHA-256 ef8d02a4bf864df7…

MALICIOUS

PDF

33.7 KB Created: 2021-06-28 04:14:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 68c766b7acfee7badbc2f7ed2664036a SHA-1: c16af2ce6e1cba78e7e1e39b07d9c03b8bfd511d SHA-256: ef8d02a4bf864df72cc3503f621272bb2281f1dd3a183b40100e88afbab3b7df
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a redirector URL, which is associated with malicious activity and game hack lures. The document body and embedded URLs suggest a phishing attempt to trick users into visiting potentially harmful sites. No scripts were extracted from this sample, but the presence of embedded URLs and the lure content strongly indicate a phishing or scam campaign.

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/how-to-get-rs-in-roblox-free-game-hack In PDF document text
    • https://www.mpos-organs.com/uploads/files/files/earn-roblox_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/roblox-robux-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-robux-games-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-coin-master-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/gift-card-hack-roblox_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-robux-websites-2021_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/how-to-hack-john-does-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/how-can-i-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/minecraft-pc-download-free-full-version_GM479516143.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-free-spin-link-today-16-11-2021_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/cheat-generator-roblox_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/best-roblox-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-robux-for-kids_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-robux-cosed_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-100-robux_GM431946152.pdfIn PDF document text
    • https://www.mpos-organs.com/uploads/files/files/free-robux-sites-2021_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_off00002d2c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D2C 22388 bytes
SHA-256: 9a05b9df17c98160afebfec847dba6d461580911bdebfeee156c8302c3296a63
font_01_sfnt_off00005eef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEF 18920 bytes
SHA-256: a4f6f8f4c0e5a44767382578a9db687a76fb9d40d0e1566cb3d198a231ea6712

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