Malicious PDF — malware analysis report

Static analysis result for SHA-256 a916d03bd1362231…

MALICIOUS

PDF

34.0 KB Created: 2021-06-19 01:30:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-15
MD5: b7f5fd6056fbd0099cd155e1b2029d5c SHA-1: d1644e5ce27f45cbacf2f7b63a44bf437922e7f8 SHA-256: a916d03bd136223117c325257e32940a06d73e574f44e55ef53db93f7401ce65
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a critical heuristic firing for a game hack redirect lure, pointing to malicious infrastructure. The document body explicitly contains the URL 'http://netcdn.co/app/431946152/how-to-get-halo-for-free-roblox-game-hack', which is also listed as a primary IOC. The ML classifier also flagged this PDF with high confidence. The presence of embedded URLs and the lure suggest an attempt to redirect users to a malicious site, likely for further exploitation or credential harvesting.

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/how-to-get-halo-for-free-roblox-game-hack In PDF document text
    • https://www.xenonsvjetla.com/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/haktuts-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/como-sacar-buen-puntaje-en-juego-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-100-spin_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-get-free-skins-in-minecraft_GM479516143.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-roblox-hair-girl_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-spin-link-app_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-do-you-get-free-robux-on-your-phone_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-wearedevs_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/hack-version-coin-master-apk_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/hack-roblox-jailbreak-fr_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-daily-gift-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/how-to-hack-for-2021-robux_GM431946152.pdfIn PDF document text
    • http://xenonsvjetla.com/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/tp-hacks-script-roblox_GM431946152.pdfIn PDF document text
    • https://www.xenonsvjetla.com/files/coin-master-free-link-facebook_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://xenonsvjetla.com/files/hack-coin-master-iphone_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_off00002f28.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F28 22076 bytes
SHA-256: 6b301653cb1015b67566b9193f37bb5d20a54ece86d08343e808feb651d3292a
font_01_sfnt_off00005ff4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF4 18920 bytes
SHA-256: 2fbd0169e9d91dc72c0ef9adb95079c16333b40f4b27628dc2c6b131d54b68af

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