Malicious PDF — malware analysis report

Static analysis result for SHA-256 12577b7095e8015a…

MALICIOUS

PDF

46.6 KB Created: 2021-06-03 08:35:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-20
MD5: 0ba936528a0b3c4fdf7784aee5c876de SHA-1: 1e94bd016e388a816dcf218dbb8e34cc9a956237 SHA-256: 12577b7095e8015ae0e8f589e76b142bd1ea2d75dde42adad275bfda5a1fefd9
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to external websites, including a known malicious redirector. The document body and heuristics suggest a lure for 'game hacks' or 'free generators', which is a common social engineering tactic to trick users into downloading malware. No scripts were extracted, but the embedded URLs are the primary indicators of malicious intent, likely leading to a second-stage download.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9748

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.online/app/1094591345/pokemon-go-free-like-games-game-hack In PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-app-real_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/easy-robux-today-com_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-minecraft-server-hosting_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-claim-free-spins_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-pe-hacks-2021_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-bedrock-edition-pc-download-free_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-no-scam_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/play-coin-master_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-spins-on-coin-master-2021_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-sites-that-work_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-free-apk_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/tryrbx-site-free-robux_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/how-to-hack-a-minecraft-account_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-server-free-trial_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/coin-master-free-2021-spin-link_GM406889139.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/minecraft-hacks-xbox-one_GM479516143.pdfIn PDF document text
    • https://encounternepal.com/userfiles/files/pokemon-go-free-dragonite_GM1094591345.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_004_off00004ff2.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4FF2 25104 bytes
SHA-256: 34a9234e0a44ac22f6222756d2949274dec6c4bf23be62f6a5b0e0e5bb42ec6b
font_01_sfnt_off000089aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x89AA 2920 bytes
SHA-256: 601c50867a41b9362538ff18e5f9479a0f9badf698aaf1eb7e88469c11719db7
font_02_sfnt_off000093c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x93C3 18192 bytes
SHA-256: 39d61300b81e303296181f97b329b5c3aa920a09027dd49746a718d169a1ad6c

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