Malicious PDF — malware analysis report

Static analysis result for SHA-256 efae04f2a1704e51…

MALICIOUS

PDF

53.5 KB Created: 2021-05-17 14:38:28 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 448b4691f1dc3b7b14cb26632d7ff44c SHA-1: 27ac6bb37fad9cd94235dd155074494810ad88b8 SHA-256: efae04f2a1704e519e84e081447cfaa7adf83bfeb373dec34fc2e0d8f57a5ac5
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

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

Machine Learning

  • Nyx PDF Classifier malicious score 0.9176

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.
  • 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
  • External URI info PDF_URI
    PDF contains an external URL action
  • 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/free-robux-human-verification-game-hack PDF link annotation
    • https://deutsch-study.com/image/data/files/coin-master-hack-xyz-download-free_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/get-free-robux-com_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/rbl-gg-free-robux_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-redeem-codes-free_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-codes-generator-no-verification_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/hack-free-spin-coin-master_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-hack-coin-master-spin_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-gamepasses-on-roblox_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-roblox-gear_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/coin-master-free-spins-and-coins-blogspot_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-today_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/free-robux-kid-friendly_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/op-rewards-free-robux_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/roblox-free-robux-codes_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/coin-master-free-spin-now_GM406889139.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-robux-without-surveys_GM431946152.pdfIn PDF document text
    • https://deutsch-study.com/image/data/files/how-to-get-free-robux-on-roblox-2021_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
font_00_sfnt_off00004da1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4DA1 28272 bytes
SHA-256: 441d42c827b0e8537decddbc183256cf6303f43101a7dad54dfb0d88d645966d
font_01_sfnt_off00008e8b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8B 8132 bytes
SHA-256: e6d68e720ea5acf9dccbf7ffde18db6f65c62a99ab7725aa43e30329033a7787
font_02_sfnt_off0000a978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA978 20188 bytes
SHA-256: 714419f6193091ba063c7b800c050728286c2b2f0eea919363fdf2f0600ea0aa

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