Malicious PDF — malware analysis report

Static analysis result for SHA-256 fe69833781ab4282…

MALICIOUS

PDF

35.2 KB Created: 2021-07-06 06:50:48 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 81c5c9c54d2976d02c9bab21e5184b19 SHA-1: 2559d90a0a1fb8a0018b278dc66845883dc89022 SHA-256: fe69833781ab42825208ab267dd1e58d139c5e1a1fe91a7991d981404295e6f8
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a high-confidence heuristic indicating it links to a 'free generator / game hack' redirector. The document body also contains the URL http://netcdn.tw/app/431946152/funny-roblox-characters-free-game-hack, which is likely the malicious payload delivery point. The ML classifier also flagged this PDF as malicious with high confidence.

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/funny-roblox-characters-free-game-hack PDF link annotation
    • https://library.sman1berau.sch.id/repository/get-free-lives-on-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-without-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/best-minecraft-hacked-client-2021_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-website_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/blox-fish-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-hack-apk-download-for-android-mobile_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-to-download-wurst_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-spins-2021_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-skins-free-girl_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/cara-cheat-roblox-lumber-tycoon-2-money_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/roblox-free-mobile_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/coin-master-free-coins-generator_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-roblox-gift-card_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/minecraft-skins-download-free_GM479516143.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/how-do-you-get-free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/free-robux-no-verification-2021_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/pixies-gigantic-coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/claim-free-robux_GM431946152.pdfIn PDF document text
    • https://library.sman1berau.sch.id/repository/robux-scam_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000327d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x327D 22480 bytes
SHA-256: 104f75bc0f66bfcf01cd2245740f6c8bcfa51d5c509e06d49cd34c6c7369c23a
font_01_sfnt_off00006494.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6494 19052 bytes
SHA-256: 666d8946e44fce7b472a5474b42a96557e3f2d9c6aad02c7ced51cd3fd2bd2a6

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