Malicious PDF — malware analysis report

Static analysis result for SHA-256 402debcf5d533928…

MALICIOUS

PDF

44.5 KB Created: 2021-05-17 14:20:32 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: d7934c0eda22a9007dbd6d2dba53eeb7 SHA-1: 80eba890cc9c9eb4a30ffbd3bb4b86ac3d9645c8 SHA-256: 402debcf5d5339280636012ee9d5ec5cc7803c2aba6139c4a3083f82ae65521b
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 0.9632

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.xyz/app/479516143/how-to-get-java-minecraft-free-game-hack PDF link annotation
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-free-spins-link-2021-no-verification_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/minecraft-java-free-trial_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/freerobuxhack-us_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/wurst-client_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-free-draw_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/how-to-get-minecraft-for-free-on-iphone-2021_GM479516143.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-app-for-free-spins_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/i-want-robux_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/oginject-co_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-for-pc-free-download_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robux-free-com_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/is-coin-master-hack-safe_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-no-download-hack_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/roblox-hacks-and-cheats_GM431946152.pdfIn PDF document text
    • https://www.simplenepaltravel.com/userfiles/files/robux-generator-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off000048d6.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x48D6 24892 bytes
SHA-256: c10de2920eeb3be19f45898d23f444a0e5ed3fc810ced3357eb3f2513e6b780e
font_01_sfnt_off0000818a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x818A 3056 bytes
SHA-256: dd24a0ab94df4552e459bd06fd01b0fd3f021c1d51d1d64407070e735974a028
font_02_sfnt_off00008bfd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8BFD 18152 bytes
SHA-256: b07ca7cfd9f4df49e8124e55bb29c456f703fc5bdce85e2b26b96107911b04a3

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