Malicious PDF — malware analysis report

Static analysis result for SHA-256 8b5b55b67df1efb6…

MALICIOUS

PDF

43.7 KB Created: 2021-06-14 00:34:03 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: a3aae7c69999c492ea841e9baa5a1c81 SHA-1: 51ca4efe0aea52f5910b45d45f57fbb7c04d511a SHA-256: 8b5b55b67df1efb69674c11b899e32faa5e8e9dbdd1bafa9a967ce05db022723
102 Risk Score

Malware Insights

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

This PDF file contains multiple links to external websites, including one that directly advertises 'roblox-rifle-script-hack-game-hack'. The presence of a high-confidence ML classifier firing and the nature of the linked content strongly suggest a malicious intent to lure users to download potentially harmful files. The document body, though heavily obfuscated, contains URLs that are indicative of a phishing or malware distribution scheme.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

Heuristics 5

  • PDF links to a 'free generator / game hack' redirector high 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/roblox-rifle-script-hack-game-hack PDF link annotation
    • http://118.174.0.244/UserFiles/File/minecraft-free-download-chromebook_GM479516143.pdfPDF link annotation
    • http://118.174.0.244/UserFiles/File/cute-free-roblox-outfits_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-followers-on-tiktok-for-free_GM835599320.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-minecraft-for-free-on-android-device_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-free-download-mac-full-version-2021_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-spin-link-today-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-free-spins-no-generator_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/classic-minecraft-net-hacks_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/is-there-any-way-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-minecraft-printables_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/roblox-hack-com_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/f3x-tools-hack-roblox_GM431946152.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/get-follower-tiktok-free_GM835599320.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-cheat-free_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/links-for-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/how-to-get-java-minecraft-free_GM479516143.pdfIn PDF document text
    • http://118.174.0.244/UserFiles/File/free-spins-for-coin-master-hack_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_off00004afa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4AFA 27060 bytes
SHA-256: cd682d07eb84379558d439b3d83e08403ac51d1ba890507218779b5e16c87356
font_01_sfnt_off000087c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87C3 18580 bytes
SHA-256: c14f66c109114635336001512cfc189a8cb494403f6924e904ca58781592202b

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