Malicious PDF — malware analysis report

Static analysis result for SHA-256 8d452a2c2ae83fbe…

MALICIOUS

PDF

34.4 KB Created: 2021-06-17 22:27:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-27
MD5: f9910118a9b79fcfe04adb28d2b8acc5 SHA-1: cab107d89e12e652e74911045b5a6d26455be738 SHA-256: 8d452a2c2ae83fbe6449d42bcc91710ffc929f657a7279e10b8363261ba6f90f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple heuristics indicating it's a malicious redirector lure, specifically targeting users interested in free game currency or hacks. The embedded URL 'http://netcdn.co/app/431946152/do-this-for-free-robux-game-hack' is identified as a malicious redirector. The document body, though partially garbled, contains text related to 'free Robux' and 'game hack', reinforcing the lure. No scripts were extracted, but the overall pattern suggests a phishing attempt to redirect 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/do-this-for-free-robux-game-hack In PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-credit-card-to-buy-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/6-ways-to-get-millions-of-robux-unlimited-free-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-minecraft-website_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/www-roblox-com-robux-free_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-a-lot-of-robux_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-do-i-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/free-robux-images_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-free-golden-card-in-coin-master_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/how-to-get-free-robux-and-tix-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-112-hacked-client_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/minecraft-cracked-client_GM479516143.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://dolphintour.vn/images/uploadsfiles/robux-hack-me_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_off00003005.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3005 22384 bytes
SHA-256: c17fb873a65d7a568c22ff68488ab9acc9838b63cea61fdd2d76beac13a2c45a
font_01_sfnt_off000061c4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61C4 18984 bytes
SHA-256: 4f65963c49ba9b97d7a5be44c46e837e0513742c363f84ca8784807cb49ede5f

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