Malicious PDF — malware analysis report

Static analysis result for SHA-256 689dbd191dc5447f…

MALICIOUS

PDF

34.4 KB Created: 2021-07-05 06:57:44 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-11
MD5: 475f541e38c390dd577857ffee4301ad SHA-1: 32266e0e4fbc9d026716de47f88198105c49abf1 SHA-256: 689dbd191dc5447f5b25a6bfbd858d904dd716caeb5b8018d28ecd71b050331a
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple links, including one identified as a malicious redirector, that lure users to websites offering game hacks and virtual currency. The primary link, http://netcdn.tw/app/431946152/how-to-earn-robux-fast-game-hack, is designed to trick users into believing they can obtain in-game items. While no scripts were explicitly extracted, the PDF structure and embedded URLs strongly suggest a phishing or social engineering attack aimed at driving traffic to potentially harmful sites.

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.tw/app/431946152/how-to-earn-robux-fast-game-hack In PDF document text
    • http://library.umla.ac.id//repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/rewards-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/roblox-army-free-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/play-roblox-for-free-on-google_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id//repository/coin-master-hacks-no-surveys_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spons-apk-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-games-like-minecraft_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/gain-robux_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/is-pokemon-go-free_GM1094591345.pdfIn PDF document text
    • http://library.umla.ac.id//repository/free-arsenal-hacks_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-coin_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id/repository/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://library.umla.ac.id/repository/coin-master-15-free-spin-link-today_GM406889139.pdfIn PDF document text
    • http://library.umla.ac.id//repository/mc-update_GM479516143.pdfIn PDF document text
    • http://library.umla.ac.id/repository/send-me-500-2021-spins_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_off00002f72.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F72 22436 bytes
SHA-256: 7944415ac7099f83bca285e3b3f220a7164451fa99aa7de22b9f12ea4272bebd
font_01_sfnt_off00006162.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6162 18984 bytes
SHA-256: 5ca84e360020f2da74b1bf48c9ff4dc9eaa54ebf907e56a30fd03d2b8a30e01b

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