Malicious PDF — malware analysis report

Static analysis result for SHA-256 cae5a61735ff2fb7…

MALICIOUS

PDF

33.7 KB Created: 2021-06-19 18:00:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: f8c88a1b299ea7ad43727fca4e874b59 SHA-1: 30c1686b8518759cc5e893277554696a1577baa7 SHA-256: cae5a61735ff2fb7cd5e6d11866cc830570ad703fffe12bb2e51b89be2a91108
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains multiple embedded links that redirect to malicious infrastructure, specifically promoting 'free game hacks' for Roblox. The document body and heuristics indicate a lure designed to trick users into visiting these sites, likely for further malware delivery or credential harvesting. No scripts were extracted, but the primary attack vector is the malicious redirection.

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/roblox-rc7-free-game-hack In PDF document text
    • http://library.ulb.ac.id/repository/fbchampion-com_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/can-u-earn-free-robux-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/crazy-robux-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-robux-page_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-speed-hack-btools-12042021_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/collect-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/cheats-max-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/pastebin-com-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/all-roblox-hacking_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/roblox-hack-unlimited-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/block-best-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-setup-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/minecraft-bedrock-edition-free-with-java_GM479516143.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/comment-cheat-les-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-800-robux-code_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id//repository/ways-to-get-free-robux_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_off00002cc9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2CC9 23024 bytes
SHA-256: 765afa21bd9ee5f38f0e8e8a6eda93a90b75be7e361b489d1c67e3ab1b6ad3f1
font_01_sfnt_off00005fab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FAB 18704 bytes
SHA-256: 9b27ed67ab9e6235dc62e3d8e27caf77a2defb29db12c3d0dbc12f4240c8d338

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