Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab22c36debb237b…

MALICIOUS

PDF

34.5 KB Created: 2021-06-27 06:27:35 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 1d9b00c2bf9df296f68f130cf58be70d SHA-1: 686fc20810da1807c26eaa2b008b5842ea99a9db SHA-256: aab22c36debb237b1ed3168c124fbc3f1acb10cf2caf3c72ead8b4c501d9b176
160 Risk Score

Malware Insights

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

The PDF contains multiple links to a redirector hosted on 'netcdn.co', which is flagged as malicious and associated with game hack lures. The document body and heuristics indicate a deceptive attempt to trick users into visiting a URL, likely to download further malicious content. No scripts were extracted, and the primary malicious functionality appears to be the redirection to a malicious URL.

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-clothes-2021-game-hack In PDF document text
    • http://repository.ummy.ac.id//repository/cm-daily-spins_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-cards-giveaway_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-free-robux-nicsterv_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/all-of-the-free-wings-on-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/how-to-get-free-money-on-roblox-meep-city_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/coin-master-hack-tool-v1-9-download-free_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/hacker-vs-owner-roblox_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/hey-google-how-do-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-tiktok-likes_GM835599320.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/roblox-hack-official-site_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-script_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/60-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-robux-promo-codes-gen-2_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id//repository/how-do-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://repository.ummy.ac.id/repository/free-cloth-on-roblox_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_off00002e15.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E15 22412 bytes
SHA-256: d2968901a855a5add00c84b84d61c952bb42294f776b5a0c74b1784f47142e3e
font_01_sfnt_off0000603e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x603E 19488 bytes
SHA-256: 5d3f2b258ad070883a7de74136b3b00ad8b666feb1513b30cc7984ac98b0e64c

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