Malicious PDF — malware analysis report

Static analysis result for SHA-256 c5568a9207be0126…

MALICIOUS

PDF

34.0 KB Created: 2021-06-30 06:17:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: 01aeee2a7d09e21c3392c01eea4f6d3f SHA-1: d2247433eb7c43eb6134a9d141c928ffc17b1b84 SHA-256: c5568a9207be01261d886eba4d04cefaeba1e8ac7395c8e47932d91f4750a759
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and lures related to free game currency and hacks, specifically targeting 'Robux' and 'Coin Master'. The primary malicious link directs users to a known malicious redirector infrastructure. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest a social engineering tactic to drive traffic to potentially malicious sites, likely for credential harvesting or malware distribution.

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/free-robux-cheap-game-hack In PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-robux-for-free-on-android_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-download-roblox-hack-proxo-reborn-v132_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/coin-master-34-4-free-download_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-coins-and-spins-for-coin-master-game_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/logiciel-hack-roblox-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-many-levels-are-in-coin-master_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-premium-roblox_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/mobihack-robux-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-get-free-robux-to-hacks_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/robloxmatchcom-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-tokens-roblox-assassin_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/easy-robux-generator_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-spins-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/how-to-make-roblox-tool-script-hack_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-robux-hack-no-password_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/descargar-roblox-hack-robux-infinitos_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/hack-para-roblox-phantom-forces_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/free-play-roblox-no-download_GM431946152.pdfIn PDF document text
    • http://opac.kolejkrim.edu.my/repository/roblox-hack-for-free-obc_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_off00002d7b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2D7B 22496 bytes
SHA-256: 8f452fd474869d4d9768d59b15b9273e24921bae8926189d074b084ea524449b
font_01_sfnt_off00005fe5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FE5 19060 bytes
SHA-256: 1dca83ff545fd41d0ca162bdaad22fe02057d8b7d38deba33e4320da9cccaf96

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