Malicious PDF — malware analysis report

Static analysis result for SHA-256 cf012e82ea7e4927…

MALICIOUS

PDF

34.3 KB Created: 2021-07-02 06:41:50 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 2f60bf0f5b5f6922d98753a04096a23a SHA-1: de584fc4f4ee25cba6eee0d63618d110bb2581ef SHA-256: cf012e82ea7e49272f660ad0728a258edf954ad8715f1dc3783434681b41d940
180 Risk Score

Malware Insights

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

The PDF contains a malformed exploit stream and links to known malicious redirector infrastructure, specifically http://netcdn.co/app/479516143/is-minecraft-education-edition-free-game-hack. This indicates an attempt to exploit vulnerabilities or trick the user into visiting a malicious site. The document body and embedded URLs suggest a lure related to free game items or hacks, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • 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/479516143/is-minecraft-education-edition-free-game-hack In PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-part-avatar-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-free-robux-no-human-verification-20212021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-roblox-executor-2021_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-account-and-password-roblox-generator_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-body-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-master_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-robux-hack-cheat-engine-64_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/exploit-hacks-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-website-real-no-human-verification_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/fun-flex-roblox-hacks_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/microsoft-free-robux_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/how-to-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-robux-games-on-the-front-page_GM431946152.pdfIn PDF document text
    • http://pustaka.manajemen.fekon.unand.ac.id/repository/free-sexy-roblox-costume_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_off00003310.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3310 21900 bytes
SHA-256: c34cacfc431371f19fa78cc4beb5b984213e192a8ae7ecd73fac876f4ece3952
font_01_sfnt_off00006339.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6339 18312 bytes
SHA-256: eecac33872f4bf99db25d0145d9acf2ab6d7270ffb9fefd56cdfeedcf9aa8f6d

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