Malicious PDF — malware analysis report

Static analysis result for SHA-256 022d0c9cefcccfb4…

MALICIOUS

PDF

34.3 KB Created: 2021-07-06 04:49:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: ac5dacc12cc6e6701b1c562dfd3f854f SHA-1: ce96f883283b8a794fd69530f59cb87665252ba1 SHA-256: 022d0c9cefcccfb46244fce7acf3f9ac4f66d01fe47f21560fc41ec6da0a7d2c
160 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to a known malicious redirector. The document body and embedded URLs reinforce this by referencing game-related lures like 'Coin Master Free Spin' and 'Roblox hacks'. The primary IOC is the malicious redirector URL, which likely serves as a gateway to further malicious content or exploits.

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.tw/app/406889139/coin-master-free-spin-realme-products-game-hack In PDF document text
    • https://www.ocic.hr/files/roblox-how-to-hack-into-anybodys-account_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-exploit-roblox_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/10-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-daily-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/robux-hacks-2021_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/coin-master-game-free-play-online_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-free-items-in-roblox-february-2021_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/free-robux-generator-for-kids_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/collect-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/minecraft-life-hacks_GM479516143.pdfIn PDF document text
    • https://www.ocic.hr/files/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/sites-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.ocic.hr/files/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://www.ocic.hr/files/minecraft-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • http://www.ocic.hr/files/free-robux-accounts_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.ocic.hr/files/roblox-hack-how-to-use-infinite-jump-we-are-devs_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/do-you-want-free-robux-get-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://www.ocic.hr/files/tiktok-free-view-40_GM835599320.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_off00002f4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F4A 22656 bytes
SHA-256: 9e83c9a8ccb5e2a1ede18dffd287a279e9b2a95a357aa27c1bed9551bc46217a
font_01_sfnt_off0000616d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x616D 18976 bytes
SHA-256: 9a063faea9114050ab3b1da930e9c077db51df0f0eeb33b8a77db856b87907e7

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