Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b08e7ebd69f226b…

MALICIOUS

PDF

43.3 KB Created: 2021-05-11 05:31:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-08-25
MD5: 847de5b5f7a76b050175c5a479aff7f8 SHA-1: 1756ebffbd79da638513e3a25d1269fb7bd360af SHA-256: 0b08e7ebd69f226beb57f0b6c8f56563558d452a2ed817ac071d6a0cc9e4c32d
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF contains a critical heuristic firing for a redirector link disguised as a 'free generator / game hack' lure. The embedded URL, https://netcdn.xyz/app/431946152/win-free-robux-game-hack, is known to be malicious. The document body, though heavily obfuscated, contains references to 'Win Free Robux' and 'game hack', reinforcing the lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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/win-free-robux-game-hack In PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/free-spins-for-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/minecraft-115-2-hacks_GM479516143.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/free-robux-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/roblox-booga-booga-hack_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/coin-master-free-spin-whatsapp-group_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/coin-mster-free_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/how-do-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/robux-2021_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/coin-master-free-coins-today_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/roblox-fun-robux_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/coin-master-email-rewards-link_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/coin-master-hack-2021-ios_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/coin-master-hack-apk-ios_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/how-to-get-free-stuff-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/roblox-studio-free-robux_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/how-to-change-roblox-username-for-free-2021_GM431946152.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/coin-master-free-spin-software_GM406889139.pdfIn PDF document text
    • https://www.aevasia.com/uploaded_files/userfiles/files/how-to-get-free-minecoins-in-minecraft_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000049a3.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x49A3 26760 bytes
SHA-256: d9ac833f6aeb94f6b74e289642387927586ea504eee6db0282e2113dfd2fa5c3
font_01_sfnt_off000086eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86EB 18332 bytes
SHA-256: abf0b8ed31f5047ebf3c1463738251345f2a3e8ea43e3f17fb5c5b26bb0b5a7e

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