Malicious PDF — malware analysis report

Static analysis result for SHA-256 1239b00fc9294acc…

MALICIOUS

PDF

34.1 KB Created: 2021-07-05 10:07:47 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: b7d783fc93eadef42b0a324995ae92d3 SHA-1: db6d0e02913dc79c1faece3bb1d6ecd82941a777 SHA-256: 1239b00fc9294accdc594633864704ef0e9cb231e6675d7abb6f345d70a9b0c9
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The ML classifier also flagged the PDF as malicious with high confidence. The document body and embedded URLs reinforce the lure of obtaining game-related cheats or currency, which is a common social engineering tactic to drive users to malicious sites.

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/blox-best-robux-game-hack PDF link annotation
    • https://elibrary.ikhac.ac.id/repository/master-coin-free-spin_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-roblox-code-redeem_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-come_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-premium-v3rm_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-admin-hack-dll-download_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/hack-coins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/phantom-forces-roblox-cheats_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/lemon-aid-roblox-hack_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-stuff-roblox-obby_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-to-hack-roblox-accounts-without-inspect-element_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-accessorys-althiem-online-roblox_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/how-do-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/but-link-says-free-robux_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-free-robux-hack-no-offers_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-cheats-without-verification_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-easy-tix-cheat_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-work-at-pizzqa-place-cheat_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/coin-master-100-free-spins-link_GM406889139.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/roblox-speed-hack-check-cashed_GM431946152.pdfIn PDF document text
    • https://elibrary.ikhac.ac.id/repository/free-robux-codes-2021-and-how-to-imput-them_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_off00002f33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F33 22340 bytes
SHA-256: 47ce9301a8a6973c68b6c581fc6986c7960dff1a664e92162a64f3f3240dab49
font_01_sfnt_off00006109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6109 18728 bytes
SHA-256: beb9102fb9ccdcb8dd558d5dcd27b2d7f75eabf9ef026969fea69f0881a387a0

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