Malicious PDF — malware analysis report

Static analysis result for SHA-256 5443c2afd706b70e…

MALICIOUS

PDF

45.5 KB Created: 2021-06-09 06:47:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 2263967106e45c7d3a32ee42c560bf43 SHA-1: 183f565bae5335ffdaeaf3a55d281eeaacece109 SHA-256: 5443c2afd706b70e57e2c9cf1eaa491718bd045ef8e21f9c0436abc338574fb7
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 0.9864

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/hacks-for-blood-flow-roblox-game-hack PDF link annotation
    • https://opac.heritagejkt.org//repository/coin-master-free-gold-cards_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/http-bitly-coin-master-free-2021-spins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/best-free-minecraft-texture-packs_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-minecraft-for-free-on-mobile_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-hack-cydia_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/xray-mod-minecraft-114_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/tiktok-free-generator-fans_GM835599320.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/roblox-exploit-scripts_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/minecraft-free-online-games_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-spins-free-2021_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/minecraft-wurst-hacked-client_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/minecraft-java-edition-redeem-code-free-2021_GM479516143.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-free-spins-and-free-coins_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org//repository/coin-master-hack-reddit_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-site_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/coin-master-hacksco_GM406889139.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/free-robux-without-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://opac.heritagejkt.org/repository/daily-coin-master-free-spins_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_off00004ea5.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EA5 28524 bytes
SHA-256: 0d45a7dbf4b8c4c06fcc9bde2d15085d9285243d33057d4f5ac0989f9e787667
font_01_sfnt_off00008e35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E35 18684 bytes
SHA-256: 14c0efbfa4a048f7c98286c1e2476816f7f20abef4fef405a47747fee3ac04a1

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