Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae7311edd1850c3…

MALICIOUS

PDF

33.1 KB Created: 2021-07-02 02:11:41 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: bf612ce4eb668db9546208526c1d4dd4 SHA-1: 37ab704d6cc421ee57fa43c5adafe7a3377ac738 SHA-256: cae7311edd1850c3bf4a7f0a5b1fecabb49c28a9d41f3690f94018765d922f62
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links that are flagged as malicious redirectors, specifically promoting "free Robux" or "game hacks." The document body explicitly contains a call to action to access a "ROBUX GENERATOR" via a URL that is also flagged as a malicious redirector. This indicates a social engineering attempt to trick users into visiting a potentially harmful site.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/youtube-videos-how-to-get-free-robux-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/daily-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheats-codes-roblox-treasure-hunt-simulator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/spin-link-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheat-roblox-shark-bite_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/tiktok-free-99_GM835599320.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/assassin-roblox-lag-cheat_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-cheat-engine-64-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/hacks-para-roblox-super-power-training-simulator_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-without-information_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-a-halo-in-roblox-royale-high-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-2021-march_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-secret-discovered-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-roblox-gift-cards_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-android-game_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pastebin-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/earn-robux-today-earn-robux-today_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-robux-without-doing-anything-2021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-free-rthro_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/does-coin-master-hack-work_GM406889139.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_off00002b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B25 21688 bytes
SHA-256: 0ea9427a889cbccac66c0ab5c4fbe1dc6a4fabcf0405ecb5c47ad0afee7c7cf3
font_01_sfnt_off00005af1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AF1 19576 bytes
SHA-256: a9ce0f0de8abb51f584f97ebbb556d87ae35f27bc911baca674f24cc0401c2a3

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