Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0ba33c5d73367f0…

MALICIOUS

PDF

43.5 KB Created: 2021-05-17 09:15:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 7580dd1aa4ad39b3fe6a77df7108d83f SHA-1: 3a74f0fd18edc5eb95157aff8b4f88a85895fe2f SHA-256: a0ba33c5d73367f0e7453dd87ee520c0d69c470b4f5fd3dbd8f7c0a3f0df1eee
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a primary link to 'netcdn.xyz' which is flagged as a malicious redirector. The document body and heuristics indicate a lure related to game hacks and free currency, suggesting the intent is to redirect users to potentially malicious content or phishing sites. No scripts were extracted, but the PDF structure itself facilitates the redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/431946152/roblox-cheat-robux-game-hack In PDF document text
    • https://gryps.de/images/free-coins-and-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/get-free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/coin-master-fan_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-daily-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/chisel-and-bits-mod-pe_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/free-spins-in-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-log-out-of-coin-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-spin-link-coin-master-app_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/coin-master-free-spins-blogspot_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/free-robux-rewards_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/113-hacked-client_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/pasos-para-hackear-coins-master_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-get-minecraft-on-chromebook-for-free_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/minecraft-free-download-windows_GM479516143.pdfIn PDF document text
    • https://gryps.de/images/robux-no-survey_GM431946152.pdfIn PDF document text
    • https://gryps.de/images/coin-master-free-coins-cheat_GM406889139.pdfIn PDF document text
    • https://gryps.de/images/how-to-hack-coin-master_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
stream_003_off00004570.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4570 29280 bytes
SHA-256: edbd58b87cd5d46e14a1bfd9768968f778135e0d807f25b1eed00ba4d86489dd
font_01_sfnt_off00008746.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8746 18424 bytes
SHA-256: a96f43e65daf9623fa7b9bc259dd656765653644365f0d7d49582fe5e9502473

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