Malicious PDF — malware analysis report

Static analysis result for SHA-256 77471f3417e7acf9…

MALICIOUS

PDF

44.9 KB Created: 2021-06-11 06:14:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f039793d722bc0e34d73b021ec738bdf SHA-1: 6c171d8331c2258fce8c59b3f4329ba761d1432b SHA-256: 77471f3417e7acf9934a5570f0393eb1125b2c8b36e8d1d943eebcc5c4c5174f
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a malicious redirector link, specifically pointing to a lure for game hacks and free generators. The document body, though heavily obfuscated, contains references to the same URL. This indicates the primary purpose is to redirect users to potentially malicious websites, likely for further exploitation or credential harvesting.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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.tw/app/431946152/roblox-free-avatar-drawing-game-hack In PDF document text
    • http://lib.untad.ac.id/repository/how-to-get-minecraft-dungeons-for-free_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/i-need-more-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/roblox-free-robux-website_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-robux-generator-no-human-verification_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-game-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/kuso-icu-roblox-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-minecraft-worlds_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/minecraft-free-version-pc_GM479516143.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/coin-master-link-today_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/ultimate-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hydra-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/hack-coin-master-pc_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/free-robux-real_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/roblox-com-hack_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/how-do-you-get-free-roblox-money_GM431946152.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/free-spin-coin-master-instagram_GM406889139.pdfIn PDF document text
    • http://lib.untad.ac.id/repository/tiktok-free-trial_GM835599320.pdfIn PDF document text
    • http://lib.untad.ac.id//repository/minecraft-hack-mod_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_004_off00004e0f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4E0F 26796 bytes
SHA-256: e71a12247c4fbd6f57bbe9c0a831afc344a984ed2250ce801bfc0a96146d19cf
font_01_sfnt_off00008a0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A0B 19136 bytes
SHA-256: d6ebd2585dfda7444263719b094bd13fb7775489f22ed6e98503123aef2c35f1

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