Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9f88c486a1d07ef…

MALICIOUS

PDF

43.7 KB Created: 2021-05-14 19:38:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2026-06-04
MD5: a5367a6121aad31c1acb905c70aac98b SHA-1: 51544c854b912a4f3cb8aec2ea46da298b1e6529 SHA-256: c9f88c486a1d07eff137487f45eec08aa6d41680a1747ff28e4153577700db47
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links to known malicious redirectors and game-related lures, such as 'free hair in Roblox' and 'coin master hack generator'. The ML classifier also flagged this PDF as malicious. The primary malicious link identified is https://netcdn.xyz/app/431946152/how-to-get-free-hair-in-roblox-game-hack, which is likely used to deliver a secondary payload or lead the user to a phishing site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9141

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/how-to-get-free-hair-in-roblox-game-hack In PDF document text
    • http://aljazeera-me.com/images/coin-master-hack-generator_GM406889139.pdfIn PDF document text
    • http://aljazeera-me.com/images/free-spins-coin-master-without-survey_GM406889139.pdfIn PDF document text
    • http://aljazeera-me.com/images/coin-master-daily-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://aljazeera-me.com/images/if-you-delete-minecraft-can-you-redownload-it-for-free_GM479516143.pdfIn PDF document text
    • http://aljazeera-me.com/images/coin-master-free-spins-today-new_GM406889139.pdfIn PDF document text
    • http://aljazeera-me.com/images/free-links-coin-master_GM406889139.pdfIn PDF document text
    • http://aljazeera-me.com/images/get-me-robux-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00003ec4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3EC4 26556 bytes
SHA-256: d245b26f9334aa714cbaeb72b302e88858829334a4949b67689269a0357d23e9
font_01_sfnt_off00007b4d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B4D 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000885f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885F 18564 bytes
SHA-256: d67237273ed03f92aa8c6c4764a8757174e90409c0462d06d9c122592efde19a

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