Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcdb261b49a5ac87…

MALICIOUS

PDF

33.4 KB Created: 2021-06-19 04:07:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 848bddef7e8a97335ac9be31c0cb6e19 SHA-1: db1cc052d2a5a5653279c895e301975ce26e5855 SHA-256: dcdb261b49a5ac872587fc58b4e33e223ea1da416c148e1be1909ab00e9c50e2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure related to 'free Robux' and 'game hacks', directing users to a suspicious URL. This indicates a phishing or scam attempt designed to entice clicks on malicious links. The presence of embedded URLs and the ML classifier's high confidence score support this assessment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

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/nonsense-diamond-free-robux-game-hack PDF link annotation
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-apk_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/freerobuxclubor_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/minecraft-hacks-115-2_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-twisted-murderer-free-radio_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-game-card-free-codes_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins-link-2021-blogger_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-hack-app_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-easy-and-fast_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-card-collection-hack-2021_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-spins-hack-iphone_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-do-you-get-roebucks-for-free_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-computer-hack_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/cm-spin-link_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/roblox-hack-exploit-guardian_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/master-8-ball-pool-free-coins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/generate-robux-for-free-with-no-downloading-games_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/how-to-make-a-modded-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • https://library.itn.ac.id/perpusitn/repository/robux-free-gift-card_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
font_00_sfnt_off00002b29.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B29 22276 bytes
SHA-256: 8f9ab9a14592adbcf771ef02be3ba9163a880ee175c535fb2803ff1425892dc5
font_01_sfnt_off00005c9e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9E 19440 bytes
SHA-256: 65131eec912626cde75092497bfc7f15e1150e47b06c23d5c4ece0fdee0f7f7e

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