Malicious PDF — malware analysis report

Static analysis result for SHA-256 17855562b55dd2e7…

MALICIOUS

PDF

34.9 KB Created: 2021-07-06 20:21:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: a534ea1b00740dfb63532552be2a8f2c SHA-1: d27f12053a702203194a08e110eab7581304ce67 SHA-256: 17855562b55dd2e70e042cdf35ef0f84103305312e6ea784df76dff7ae32ef4a
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/406889139/coin-spin-link-game-hack PDF link annotation
    • http://library.itekes-bali.ac.id/repository/spin-hack-for-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-assassin-knives-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/2021-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-ultra-attack-hack_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-holo_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-game-for-pc-free-download_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-robux-game-uncopylocked_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-do-i-get-free-robux-on-a-phone_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/apk-free-download-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-free-admin-how-spawn-overseer_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-faces-on-roblox-laptop_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-a-free-skin-noob-roblox_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/all-free-robux-websites_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-pastebin-and-inspect_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/free-robux-just-enter-username-no-verification_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spin-link-twitter_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/how-to-get-free-robux-clickbait_GM431946152.pdfIn PDF document text
    • http://library.itekes-bali.ac.id/repository/roblox-red-boy-hack-download_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
stream_002_off00003367.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3367 22836 bytes
SHA-256: ff2277d95013eac4bb8f53d7884c5fde96b1783217ba92a8a69037394f9ea2a9
font_01_sfnt_off00006645.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6645 18076 bytes
SHA-256: 28c3bbbb127f0926d8e21afd24f58e7e1c0ea518f1d6266cc8eb2e2b41c2b2be

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