Malicious PDF — malware analysis report

Static analysis result for SHA-256 b93b5bd91e64b110…

MALICIOUS

PDF

34.4 KB Created: 2021-07-06 01:20:17 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: c00aee9d729e2e3acc6fbd434473b25c SHA-1: d3fe2ee64928b16ec6b57b44c2b1c53e437b2392 SHA-256: b93b5bd91e64b1102051b0c610f3ffcda4c55302e26952fc5c69c26a7444b69d
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/how-do-you-get-robux-game-hack PDF link annotation
    • https://library.fdk.ac.id/repository/free-robux-generator-no-survey-online_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/mobihack-net-roblox-hack_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-minecraft-accounts-2021_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/freerobuxhack-us-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-get-free-robux-july_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/coin-master-hacks-for-android_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-spins-coin-master-links-2021_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-for-kids-no-verification_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/hack-roblox-pastebin-com_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-make-a-roblox-cheat-engine-exploit_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/roblox-free-download-ps3_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/legit-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-gfx-roblox_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/how-to-use-cheat-engine-in-roblox-2021_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-generators-without-doing-gift-cards_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-roblox-minecraft-fort-nitecolor-printables-pdf_GM431946152.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://library.fdk.ac.id/repository/free-robux-no-verification-no-download_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_off00002f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F80 22248 bytes
SHA-256: 208934cae9833cefdfacb7d8eba334aa438e5631185a3c60423947ef4cd5efee
font_01_sfnt_off000060bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60BC 19148 bytes
SHA-256: 6aa1a359455049c4d302ae89b0ea3ccbecfe01f67b57fe80c0c8e563803ba4d8

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