Malicious PDF — malware analysis report

Static analysis result for SHA-256 a1fd57c17bcb0482…

MALICIOUS

PDF

44.5 KB Created: 2021-06-02 12:37:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-27
MD5: 45b6f3736b7a40eb3542d2cd8cbe38a4 SHA-1: 23317018596496af37898db2663d5a332d4a289d SHA-256: a1fd57c17bcb0482fcc014cc5609bda618bed55464543293e861a0c1a002d848
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to redirector infrastructure, specifically advertising 'game hacks' for popular titles like Roblox and Coin Master. The primary lure URL, https://netcdn.xyz/app/431946152/hacks-roblox-jailbreak-game-hack, is flagged as malicious. The document body, though heavily obfuscated, contains references to these lures and the authoring application, suggesting a social engineering tactic to drive users to malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9865

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 https://netcdn.xyz/app/431946152/hacks-roblox-jailbreak-game-hack In PDF document text
    • http://tasleemdubai.com/userfiles/files/mathep_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-ios-no-jailbreak_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-make-roblox-clothes-for-free_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-roebucks-in-roblox_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-robux-on-pc_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-get-free-spins-and-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-robux-apps-that-work_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-hack-root_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/claimrbx-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/how-to-download-minecraft-for-free-on-windows_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/minecraft-windows-10-free-with-java_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/hack-coin-master-apk-2021_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/win-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/best-site-for-free-coin-master-free-spin-link_GM406889139.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-online-minecraft-server_GM479516143.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/roblox-promo-codes-free-robux_GM431946152.pdfIn PDF document text
    • http://tasleemdubai.com/userfiles/files/free-download-coin-master_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 5

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_off00004f74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F74 26168 bytes
SHA-256: 66f31ba3210a2ee0d6d8a5e8794b7579ae4127fe937b9c15e23fd6d98a7112e0
font_01_sfnt_off00008a9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A9E 18468 bytes
SHA-256: 7b179d330ea26e2314affd1da809c36442c4057b0bf9a559c13e6091ed65487b

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