Malicious PDF — malware analysis report

Static analysis result for SHA-256 c3db719282746410…

MALICIOUS

PDF

35.2 KB Created: 2021-07-01 18:47:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 3c4eac33547479076ed335c2d485fafc SHA-1: b3ca2b90734f00295b03977d89ddb9b5acb27e94 SHA-256: c3db719282746410c57f8c1aaf6cefaa7e4d041fbc6e40ddb1a3896c02565520
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and references to 'free Roblox hacks' and 'generators', aiming to trick users into clicking malicious URLs. The primary URL, http://netcdn.co/app/431946152/free-vip-roblox-game-hack, is identified as a malicious redirector. The document body and heuristic firings strongly suggest a lure for game-related exploits or scams.

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/free-vip-roblox-game-hack In PDF document text
    • https://www.advancissurgical.com/uploads/files/files/download-hacks-for-roblox-jailbreak_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/counter-blox-roblox-offensive-aimbot-hack_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-account-v3rmillion_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-get-hair-for-free-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-level-7-free-exploit_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-synapse-roblox-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/can-u-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-jailbreak-money-hack_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/how-to-hack-roblox-accounts-2021-with-wireshark_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-free-robux-hack-pastebin_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/titanic-roblox-cheat_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/dragod-hack-robux_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-dragon-ball-z-online-cheats_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/hack-coin-master-ios-download_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-free-spins-links-2021_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/roblox-free-hair-boy_GM431946152.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/coin-master-heaven-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.advancissurgical.com/uploads/files/files/daily-free-spins-coin-master_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_off00003101.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3101 22888 bytes
SHA-256: 7c898abb88de5b966d45259b3b6d55e7dcefadc6af3243cd70c8dedb129dea47
font_01_sfnt_off0000649c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x649C 19080 bytes
SHA-256: 5cd26e17e9044f55fd2016feb0b7717245efb1602296708d61af1d0891fbbad2

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