Malicious PDF — malware analysis report

Static analysis result for SHA-256 819321fdaa44b59e…

MALICIOUS

PDF

33.3 KB Created: 2021-07-04 02:28:39 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: ab9111a54fee8d01e66b5a9f9d6ae721 SHA-1: d8660d4aab0723f0d4766cd89053b013ed0aabf5 SHA-256: 819321fdaa44b59e5c18ede24663980e512ee998a525c4e49f7f0fb366026d30
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free game hacks' to entice users to click on a malicious link. The ML classifier strongly indicates maliciousness, and the PDF contains an external URI pointing to a known redirector. While no scripts were extracted, the document's structure and content suggest it's designed to lead the user to a potentially harmful website.

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/getrobux-info-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/me-hackearon-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-december-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-cam-script-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-admin-roblox-codes_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/code-for-the-roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/infinite-health-hack-roblox_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/when-will-bloxburg-from-roblox-be-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/easy-way-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/group-roblox-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-draw-2-roblox-rules_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/minecraft-free-computer-game_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-hack-thinknoodles-roblox-account_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pokemon-go-free-trades_GM1094591345.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-promo-codes-robux-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-robux-immediately_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-robux-script-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/ezekiel-how-to-change-your-roblox-name-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-how-to-get-robux-no-hack-2021-fre_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/pig-master-free-spins-and-coins_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
stream_002_off00002cbf.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2CBF 22248 bytes
SHA-256: 52c24abb7b20396472598d6483cb74d7104861f76e5ca389cf4ae39bf480cdb7
font_01_sfnt_off00005e01.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E01 18656 bytes
SHA-256: dc0a3c3c5acdce1f00df61ff0cd7230377149e24fc46f8acb7cd7add040d8ac7

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