Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a68e354a78d58a1…

MALICIOUS

PDF

34.1 KB Created: 2021-06-28 04:47:15 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: aca83b6bdacb439f42a8e211a3a1a7e9 SHA-1: 0d4cc6e196432fb7dc6a6dcd4ba484a5a9c58938 SHA-256: 9a68e354a78d58a11e13d57e6dac87254f455550a7f3a576e86c26a646b55b25
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links, including one to a known malicious redirector infrastructure at http://netcdn.co/app/431946152/free-robux-hack-no-huan-verification-game-hack. This lure, combined with the 'free generator / game hack' theme, strongly suggests a social engineering attempt to trick users into visiting malicious sites. The ML classifier also flagged this PDF as malicious with high confidence.

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-robux-hack-no-huan-verification-game-hack In PDF document text
    • http://slims.abulyatama.ac.id/repository/roblox-lua-script-gear-giver-hack_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-jackpot-madness-hack_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-hack-roblox-accounts-for-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/hack-roblox-without-gameguardian_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/coin-master-code-hack_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/websites-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-do-you-get-free-robux-works_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-minecraft-bedrock-edition-for-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-mobile-24-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-mobile-free_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://slims.abulyatama.ac.id//repository/roblox-com-robux_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-anything-free-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/those-of-us-who-remain-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/minecraft-pe-free-apk_GM479516143.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-change-your-name-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/how-to-get-free-robux-on-chromebook_GM431946152.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/free-tiktok-foryoupage_GM835599320.pdfIn PDF document text
    • http://slims.abulyatama.ac.id/repository/blox-land-free-robux_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_off00002dc8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2DC8 22420 bytes
SHA-256: dadfbb491174c0f2c08591888d10931ba5e9292c176c5c921a176464c1b7b199
font_01_sfnt_off00005fb5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB5 19244 bytes
SHA-256: 6f6ae457cf2d3cb5865b9b7a8555b30db650d8ee2026520aed5d98ba61447976