Malicious PDF — malware analysis report

Static analysis result for SHA-256 a5d901ab25a09ba0…

MALICIOUS

PDF

35.7 KB Created: 2021-06-18 12:28:11 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a20268f768ddb5ae9f1dbca92f92e027 SHA-1: a16251edc63bfce5a08b4a0c975b11baec340bb1 SHA-256: a5d901ab25a09ba081c3bf9fa7fd243e9ae3ec01122dfdd5d5b6cf9fc21fbce2
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure, designed to lure users into clicking for game-related cheats or currency. The primary link, http://netcdn.co/app/431946152/robux-free-no-human-verification-2021-game-hack, is associated with a game hack lure. The document's structure and embedded URLs strongly suggest a phishing or scam attempt, likely leading to further malware or credential harvesting.

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/robux-free-no-human-verification-2021-game-hack In PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-get-minecoins-in-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-free-coins-link-2021_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/robux-gainer_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/how-to-hack-people-on-roblox_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-spin-cheat_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-coins-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-minecraft-client_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/blogspot-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-minecraft-account-generator_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-free-spins-1-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/300-daily-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/roblox-hack-2021_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/can-you-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/pig-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/link-coin-master_GM406889139.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/minecraft-free-download-linux_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/free-robux-pin-codes_GM431946152.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/minecraft-esp_GM479516143.pdfIn PDF document text
    • http://gamardelli.com.br/images/ckfinder/files/coin-master-daily-free-spins-link-haktuts_GM406889139.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_off000032e7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x32E7 22304 bytes
SHA-256: 8ea772c9b731ff5009c6bd77ded42225dc96d1c90596169d930be4080791996e
font_01_sfnt_off00006496.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6496 19736 bytes
SHA-256: 4fd290dc37c9a492e41b857c9710dbe7bf2b66a3c096048a9d23d725958ae435

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