Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e63beeffa7abb14…

MALICIOUS

PDF

36.8 KB Created: 2021-07-07 08:47:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 87016cdf19cf434a9a062a9b0830e870 SHA-1: 69fd8801796e8dad3becd5d82895e3c5e9ea2f48 SHA-256: 8e63beeffa7abb143e3f67d0402469decafb253edb27bcee87cec90ef6fcf03b
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically advertising a 'free generator / game hack'. The embedded URL 'http://netcdn.tw/app/431946152/rbx-land-free-robux-game-hack' is a known malicious redirector. The document body, though heavily obfuscated, contains references to this URL and other similar PDF lures, suggesting a phishing or scam attempt. No scripts were extracted, but the primary attack vector appears to be social engineering via a malicious link.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9981

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.tw/app/431946152/rbx-land-free-robux-game-hack In PDF document text
    • http://www.ocic.hr/files/hack-de-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/infinite-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-get-free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-camera-roblox_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/how-to-get-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-robux-2021-actually-working_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/coin-master-free-spins-link-2021-today_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/pubg-uc-redeem-code-midasbuy_GM1330123889.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/vermillion-roblox-hack-download_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/como-ser-un-hacker-en-roblox-2021_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-robux-app-ios_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/robux-hack-descargar_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/roblox-getting-hacked_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/free-daily-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-spins-on-coin-master-hack_GM406889139.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_off000039b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x39B7 22372 bytes
SHA-256: f96ff4c50700c5a50b062d5bc5de4259bf34f6baca4df22b002737c9a3a8f0f8
font_01_sfnt_off00006b81.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B81 18888 bytes
SHA-256: 4817daf99d7be6acb7e085ade210037e4f4d39e99fb734b610a789fe26adf34b

Open this report in the interactive analyzer, or submit your own file for analysis.