Malicious PDF — malware analysis report

Static analysis result for SHA-256 71c31c25a994a783…

MALICIOUS

PDF

35.7 KB Created: 2021-06-19 00:33:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d3634d9d372b34ad293f058c3b989e0c SHA-1: 59e498d4370b19a577b9a33ddbeb84e957f87037 SHA-256: 71c31c25a994a7835c86afcd1595de2f61d95a697287e4d6a7d4c2b42fd78409
82 Risk Score

Malware Insights

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

This PDF document contains multiple links to external websites, masquerading as "free generators" and "game hacks" for popular games. The primary lure is to entice users to click on these links, which likely lead to malicious content or further compromise. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the embedded URLs.

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.co/app/431946152/free-redeem-exclusive-virtual-item-roblox-game-hack PDF link annotation
    • http://perpus.stmik-im.ac.id/repository/best-free-roblox-executor_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-get-free-robux-no-survey_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/add-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/claim-gg-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/robux-link_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/coin-master-hack-link_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-minecraft-mods-for-pc_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-start-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/synapse-x-roblox-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-do-people-get-hacked-on-roblox_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-how-to-play-bloxburg-for-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/how-to-download-minecraft-for-free-on-your-phone_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-free-download-laptop_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-noclip-hack-download-jailbreak_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/free-coin-master-links_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/minecraft-windows-10-hacks_GM479516143.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-printables-free_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/regal-world-coin-master_GM406889139.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpus.stmik-im.ac.id/repository/roblox-club-hack_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_off00002fc0.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2FC0 23424 bytes
SHA-256: 95c70e8177585367a66f8263daf1ae8dbe1095332572e1ac001ad72dbb7b08f5
font_01_sfnt_off000064d1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64D1 19696 bytes
SHA-256: 45dd74bec89207f5a01cfed1b1b1366eaf2edf656486fc7dc83f0e77fc136181

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