Malicious PDF — malware analysis report

Static analysis result for SHA-256 f89fe8f164eefd0a…

MALICIOUS

PDF

34.8 KB Created: 2021-07-01 09:59:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 3e5c432d82be12a675254485672b12e8 SHA-1: 6a9876164b9b777ea694bdfddbbac7ec5a32813c SHA-256: f89fe8f164eefd0a4ec72938fdf402604b1f4e11706e3538aebee92ddf8e85ef
188 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains XFA form elements and malformed streams, indicating an attempt to exploit PDF vulnerabilities. It prominently features a link to a 'free generator / game hack' which is identified as a malicious redirector. This suggests the document is designed to trick users into visiting malicious sites, likely to download further malware or engage in credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 6

  • 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.
  • Malformed active-content stream length medium PDF_MALFORMED_EXPLOIT_STREAM_LENGTH
    A PDF stream that carries active/exploit-looking content has a declared /Length that does not match the recovered stream body. Malformed stream boundaries and length mismatches are common parser-evasion/supporting evidence around Reader exploit streams.
  • XFA form low PDF_XFA
    PDF uses XML Forms Architecture — can contain script logic
  • 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/roblox-mad-city-free-money-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-no-clip-cheat-engine_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-necklace-t-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-no-ban_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-sword-simulator-power-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-hack-no-human-verification_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/dantdm-roblox-shirt-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/do-free-robux-generators-work_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-20-left-arm-free_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/dansploit-hack-roblox-download_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/can-people-hack-you-through-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/pet-simulator-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-account-hacked_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-ios-android-pc-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-working-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-speed-hack-download-jailbreak_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-robux-codes-december-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-manquin-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-bad-buisness-hack_GM431946152.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
font_00_sfnt_off00003137.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3137 21904 bytes
SHA-256: fd570e596a09b4cae661bf7a13c2da6976459b3d7b473b1c5f9d6a7ec8202b62
font_01_sfnt_off000061da.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DA 19424 bytes
SHA-256: 585f76d5e14f713b17d9c6b7cbcda310ab53824682ef4e3e57da727c390ae11d

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