Malicious PDF — malware analysis report

Static analysis result for SHA-256 62bcc78aaa864089…

MALICIOUS

PDF

43.7 KB Created: 2021-05-16 23:05:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-23
MD5: dac5f846e47fdea787afbaa2696da172 SHA-1: 3f8f33214b9115e92f10f84a49bc8e010b056683 SHA-256: 62bcc78aaa864089b78dd506bc76f88b302ca30a857acfa4e9d17dbf4c2f4dd5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded links that point to known malicious redirectors, disguised as "free generator / game hack" lures. The document body and extracted URLs reinforce this theme, suggesting a phishing or malware distribution attempt. While no scripts were explicitly extracted, the nature of the embedded links and the ML classifier's high confidence indicate a malicious intent to redirect users to potentially harmful content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9648

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/406889139/free-spins-on-coin-masters-game-hack In PDF document text
    • http://bgnails.nl/images/minecraft-windows-10-edition-hacked-client_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-pro-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/minecraft-auto-miner-hack_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/claimrobux-net_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-you-get-free-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/cmaster-club-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/hack-coin-master-1_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/card-hack-in-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/buxblast-com-robux_GM431946152.pdfIn PDF document text
    • http://bgnails.nl/images/how-to-download-minecraft-for-free-on-windows-10_GM479516143.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack-app-download-free_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/coin-master-hack-trick-2021_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/free-game-packs-for-coin-master_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/master-coin-master-free-spin_GM406889139.pdfIn PDF document text
    • http://bgnails.nl/images/can-you-get-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000046da.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x46DA 24468 bytes
SHA-256: 0706cf2d9038d71fd25850882fcff6c6167c1121a8c1bf68193088d06ba16795
font_01_sfnt_off00007f4e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F4E 2880 bytes
SHA-256: 10d025f04f706eb71cdda4f99784df1b9ccb52e48080e43095e0398eaef6f132
font_02_sfnt_off00008938.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8938 17884 bytes
SHA-256: addbd5428a422ca7211e94293fed3a4f98c85d5f6337328d4d3623e90d90c649

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