Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cf91efc83dddbe8…

MALICIOUS

PDF

34.2 KB Created: 2021-06-20 00:22:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: de2925c68e6e6beb4fda2065d62eb042 SHA-1: ab3300be5fb92dd4d3ff0c2717e8f07abc1f163c SHA-256: 7cf91efc83dddbe84e3992042d7d8ae4c47eeafaecc088eba6036b54c9c18d76
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.co/app/431946152/roblox-gratuit-manete-free-box-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/free-robux-promo-codes-for-roblox-not-expired_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/golden-chain-shirt-roblox-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-get-free-clothes-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-level-7-exploit-roblox-no-virus_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-roebucks_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/microsoft-bing-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-roblox-money_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-coin-master-cards_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-hacks_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-coin-master-ios_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/gui-roblox-dinosaur-simulator-hack-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/6x6x6-hacker-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/minecraft-windows-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/all-free-stuff-on-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/20210-robux-promo-code-free_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/robux-free-2021_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/fly-hack-roblox-script_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-free-spins-link-2021-hack_GM406889139.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_off00002e97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E97 22276 bytes
SHA-256: f4c9b11db9252444d42e574218e9a0272a5f2ed7889ee176059e08ed6defa553
font_01_sfnt_off00006018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6018 19212 bytes
SHA-256: 997dc182b5bf2e4172833034dba543ea1ebef228b1ec11dacdb0e5c57b51419f

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