Malicious PDF — malware analysis report

Static analysis result for SHA-256 096ca66b3796ba62…

MALICIOUS

PDF

44.2 KB Created: 2021-06-09 02:22:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-04
MD5: d78364adb5a46fcf16d2d9fb9e28ba4d SHA-1: 6b26fa598a38ab3fc87e3a0bd061169f24259ae6 SHA-256: 096ca66b3796ba62fa26b5e1be09f5bfd5c04fe3f018e4ef3b014a74f0ff91a0
76 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document was flagged as malicious by an ML classifier. The file routes users through malicious redirector infrastructure. Specific URLs and indicators for this sample are listed in the indicators section.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9978

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector high 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.
  • External URI info PDF_URI
    PDF contains an external URL action
  • PDF differential parser failed info PDF_DIFFERENTIAL_PARSE_FAILED
    The cross-check parser (pdfminer.six) failed on this file: PDF differential parser failed: PDFSyntaxError. Static heuristics still ran and any of their findings above are valid; only the differential cross-check signal is missing.
  • 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.tw/app/431946152/free-lvl-7-executor-roblox-game-hack PDF link annotation
    • http://fkunismuh.org/perpustakaan/repository/www-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/javascript-free-robux_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/roblox-system_GM431946152.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/minecraft-hacked-client_GM479516143.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/roblox-2021-hack_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-can-you-get-robux-on-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-daily-free-spins-link-today-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/cheats-for-coin-master_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/coin-master-mod-apk-free-download_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/cute-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/free-robux-not-a-scam_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/how-to-get-free-robux-in-roblox-without-a-generator_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-get-free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan/repository/minecraft-bedrock-edition-free_GM479516143.pdfIn PDF document text
    • http://www.fkunismuh.org/perpustakaan/repository/how-to-get-more-spins-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/roblox-group-free-robux_GM431946152.pdfIn PDF document text
    • http://fkunismuh.org/perpustakaan//repository/how-to-become-a-hacker-in-roblox_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_004_off0000532f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x532F 25956 bytes
SHA-256: f754603634f7a03328df6e100b6fd1d1a1544e75b9a49993b2fcf7644f1ce98c
font_01_sfnt_off00008ec7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EC7 18360 bytes
SHA-256: 4c79e75e40e3f6b3059b65cc97f32b7f0ef4ae580344cb71819425487bf08999

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