Malicious PDF — malware analysis report

Static analysis result for SHA-256 4316cc5f1c3551c2…

MALICIOUS

PDF

34.3 KB Created: 2021-07-05 08:51:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 8055fed0631b54b2f5b69dd8ea816c28 SHA-1: 6e02a04e148e785e95ea15d94a371fd844931876 SHA-256: 4316cc5f1c3551c212d2ef52383ebc58719d0917411c6d6d8b1616a40b38e69f
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/roblox-pink-free-robux-game-hack PDF link annotation
    • https://digilib.stieama.ac.id/repository/free-robux-only-username-no-human-verification_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-ios-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-hack-spin-generator-tool_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-tix-on-roblox-no-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/bux-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/app-for-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-how-to-get-robux-free-no-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-pants-on-roblox-2021_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-roblox-jailbreak-hacks_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/totally-free-coin-master-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-links-free-spins_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-fb_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-printable-minecraft-coloring-pages_GM479516143.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/how-to-get-free-clothes-on-roblox-hack_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-gift-card-for-free_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-money-hack-tool_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/roblox-jailbreak-how-to-get-free-skins_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/five-games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • https://digilib.stieama.ac.id/repository/free-premium-in-roblox_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_off00002ff3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FF3 22048 bytes
SHA-256: 6e72142d5aa2e53973a57c6fd6b42ee3d0201fa55e77f92b7cb2ae324a6a68ec
font_01_sfnt_off000060de.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x60DE 19236 bytes
SHA-256: 7f3ae533f1b20c2c9ad227d8ec2a812f6ca4ef2a098c849ad4932b76dc1c09fe

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