Malicious PDF — malware analysis report

Static analysis result for SHA-256 da9018adf8c13c57…

MALICIOUS

PDF

34.5 KB Created: 2021-06-30 03:18:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 3928bf29410033029eda48ce0d572909 SHA-1: 55d35efee2d9964fbc055b7cee63f661b351606d SHA-256: da9018adf8c13c57b7b40f322d27a6a662d671a6527a74aa6d08e3df928df907
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document contains multiple links to redirector infrastructure, masquerading as "game hacks" and "free generators" to lure users. The primary malicious URL identified is http://netcdn.co/app/431946152/roblox-counterblox-money-hack-script-game-hack. While no scripts were explicitly extracted, the PDF structure and heuristic firings suggest it is designed to exploit vulnerabilities or trick users into downloading further malicious content, likely through the embedded links.

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-counterblox-money-hack-script-game-hack In PDF document text
    • http://library.ulb.ac.id//repository/freerobux-co_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/gift-card-generator-hack-robux-codes-hot_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-free-gold_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/free-spin-links-coin-master-2021_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/ios-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/gamepass-for-free-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-how-to-get-free-animation-packs_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-daily-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/guess-the-song-cheats-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/bloxawards-com-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/como-conseguir-monedas-en-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/robux-hack-for-apple-ipad_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/roblox-hack-codes_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/this-you-cna-do-with-cheat-engine-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/new-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-programmers_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-hack-things-in-roblox_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/chloegames-free-robux_GM431946152.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/coin-master-hack-spin-generator_GM406889139.pdfIn PDF document text
    • http://library.ulb.ac.id/repository/how-to-get-free-faces-roblox_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_off00003039.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3039 21764 bytes
SHA-256: 9451b59acfbf6896d659849574636da56deb8c3619ae8d439f74d08dcf0935c1
font_01_sfnt_off00006031.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6031 19572 bytes
SHA-256: 30fd0f99a3d7c549da7d212faa120f2202faa703ae3f847a4ff955c94cdde415

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