Malicious PDF — malware analysis report

Static analysis result for SHA-256 c99039aed68d725b…

MALICIOUS

PDF

43.2 KB Created: 2021-05-10 15:17:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 5f7fe93f17ce883d31c451b912784a64 SHA-1: a14ecdece0749478bb9dabdc0771f0aa8d9573ad SHA-256: c99039aed68d725bf629f59f024d6222372c012876ad59738a266118bbfa9c0a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors, disguised as 'free generator' or 'game hack' lures. The document body explicitly contains the URL 'https://netcdn.xyz/app/431946152/how-to-get-free-robux-youtube-game-hack' and other similar URLs, suggesting the primary purpose is to drive traffic to malicious sites. The ML classifier also flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9868

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-robux-youtube-game-hack In PDF document text
    • http://www.hotel-seminaire.com/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-free-spins-link-blogspot-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/100-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/roblox-apocalypse-rising-hack_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/coin-master-hack-mod_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-spin-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-spins-coin-master-unlimited_GM406889139.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://www.hotel-seminaire.com/images/how-to-get-more-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_off00004063.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4063 24920 bytes
SHA-256: 0d0505b238372379eb29ea23d98af330f1baec5f6186aa30cf8c1ce498f54c1f
font_01_sfnt_off000079a3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79A3 5596 bytes
SHA-256: 9a13c2580265a78e8a7257496a31ee0055738af7e20a5661c2902efe4bf05ce5
font_02_sfnt_off0000864b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x864B 18444 bytes
SHA-256: c8869677d4d84c4518e8410e1128de6ae04a76f8db213e07b668dd1668cda2fe

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