Malicious PDF — malware analysis report

Static analysis result for SHA-256 493f20a0f3be8ec2…

MALICIOUS

PDF

33.3 KB Created: 2021-07-03 16:34:30 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 5a3c025e29a8b3d35dd8248160ce70cc SHA-1: b0e1159792d8637faad152e9c517615bf761cdd2 SHA-256: 493f20a0f3be8ec25a9ccc4b045a96d705592ec7470dc9cf8571fcdd45deedc4
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 0.9980

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 http://netcdn.tw/app/431946152/get-robux-for-fre-game-hack PDF link annotation
    • https://fridaytravelnepal.com/userfiles/files/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-gear-roblox-script-pastebin_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-texture-packs-java_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/can-you-get-robux-for-free_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/games-that-give-you-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/100-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/cm-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-hacks-ps4_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/mcpe-free-download_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-get-free-hat-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/blox-world-free-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/minecraft-free-edition_GM479516143.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-800-robux_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/free-robux-codes_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/roblox-hack-me_GM431946152.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/coin-master-free-gold-cards-link-2021ee-spins_GM406889139.pdfIn PDF document text
    • https://fridaytravelnepal.com/userfiles/files/how-to-hack-roblox-to-get-robux_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
font_00_sfnt_off00002e19.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E19 21744 bytes
SHA-256: f5b846b791a297e8a2ff7ac562394b82581bdde7eb18bac8a15d62ba01210445
font_01_sfnt_off00005e3a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E3A 18636 bytes
SHA-256: f62a8513ea63613b76aada4205698e74a6bef5499836482d51096397c24eae97

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