Malicious PDF — malware analysis report

Static analysis result for SHA-256 59f04ef220f1fbb8…

MALICIOUS

PDF

47.4 KB Created: 2021-06-07 01:37:40 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 22a1a97bc67346315a880b6bd27131d3 SHA-1: 4f5557f9fa4c75ce696f87ce90d617bd4b053aab SHA-256: 59f04ef220f1fbb8bdd4472b5ddb66836fee6d76edf4eaae1eb9e08d11677a65
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 0.9832

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 https://netcdn.tw/app/431946152/hacker-takes-over-roblox-streamers-game-hack PDF link annotation
    • https://library.uigm.ac.id/repository/free-robux-generator-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/worst-roblox-avatars_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-level-4_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-easy_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-food-for-foxy-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-exploits-for-roblox_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/codes-to-get-free-robux_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/do-coin-master-hacks-work_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-glitch_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-promo-codes_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/roblox-ftw_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-daily-gift-free-spins-and-coins-link_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-free-robux-on-phone-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-free-spins-no-human-verification_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/how-to-get-minecraft-for-free-on-ipad_GM479516143.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/free-robux-generator-2021_GM431946152.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-hack-tool-generator_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-claim-spins_GM406889139.pdfIn PDF document text
    • https://library.uigm.ac.id/repository/coin-master-guide-to-free-spins-and-rewards_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_004_off00005116.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5116 30752 bytes
SHA-256: c0fc197a3cb5104274cb1c4973d10974497c224f4cd98a6034e48f31289f828f
font_01_sfnt_off00009561.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9561 18660 bytes
SHA-256: e505b37d48b520a1b31068deb88bfe7dcd734a677e36ed254f6218b5ce669f21

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