Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a539e0d71d7a048…

MALICIOUS

PDF

34.3 KB Created: 2021-06-25 11:11:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: 2515977a37a98d80cb23314e268955ec SHA-1: ed5dc9653840ff03e69a8d82bded7f5e349d2674 SHA-256: 9a539e0d71d7a04821c746636b78f2d3ef75aef309db82ffb3d492df9725b318
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a lure of free game hacks and currency to entice users to click on embedded links. These links lead to malicious redirectors, such as http://netcdn.co/app/431946152/roblox-for-robux-free-game-hack, which in turn serve further malicious PDFs. The ML classifier strongly indicated maliciousness, and multiple heuristics confirm the redirection and lure tactics.

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-for-robux-free-game-hack In PDF document text
    • http://slim.sisminkada.net/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/roblox-jailbreak-hacks-for-cheat-engine_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/was-minecraft-ever-free_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-no-verification-no-survey_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/daily-coin-master-link_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/best-roblox-hack-sites_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/robux-hack-sur-pc_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-roblox-accounts-with-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-free-spin-game_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-get-free-robux-without-downloading-any-apps_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-robux-codes-november-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-into-roblox-account-with-method_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-hack-without-downloading-apps_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/coin-master-rewards-app_GM406889139.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-robux_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/minecraft-hacked-client-18_GM479516143.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/how-to-hack-someones-account-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://slim.sisminkada.net/repository/free-tiktok-followers_GM835599320.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_off0000306e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x306E 22228 bytes
SHA-256: 699b18b5c0b13e9458f238af5cb49247f4b517ceba213da8472c3e96b03c2f04
font_01_sfnt_off000061cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61CC 18788 bytes
SHA-256: ac1076a04d327727281a05e409a88e1b9ef085d275557d8af0f44713ba66acdf

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