Malicious PDF — malware analysis report

Static analysis result for SHA-256 38364b0e1ca3219a…

MALICIOUS

PDF

34.8 KB Created: 2021-06-30 06:49:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 374643be9e2fb1484631cda99407ea2b SHA-1: 8ffcddd79b7c8a4fe35ef507e8a237a75d9dd809 SHA-256: 38364b0e1ca3219a2b259fcd45b66bec349ae555bacbe4e0959b92390f5837f5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one pointing to a known malicious redirector infrastructure. The document body explicitly mentions 'Como Hackear Juegos De Roblox 2021' and includes a URL that appears to be a lure for game hacks. The presence of multiple redirector links and the ML classifier flagging this PDF as malicious strongly indicate a phishing or scam attempt designed to lead users to potentially harmful content.

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/como-hackear-juegos-de-roblox-2021-game-hack In PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-jailbreak-hack-2021-february_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/dailyrobux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/play-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/www-free-robux_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/pokemon-go-free-coins_GM1094591345.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/minecraft-pe-016-0-apk-download-free_GM479516143.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-com-www_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-free-wings_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/free-robux-hack-no-verification_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-roblox-premium-for-free_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/robux-hack-911_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-cheat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-link-today-new_GM406889139.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_off00002f48.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F48 22128 bytes
SHA-256: 7885ff6bb131dd7742b2671fe6456cda4e59587425df502caebeee267e9e0192
font_01_sfnt_off0000608a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 19792 bytes
SHA-256: 5349ea61e6c4bd9512385fc2af7638c58ccd088055f7b33676047f04966a2695