Malicious PDF — malware analysis report

Static analysis result for SHA-256 f28d7eb3dfb44ff2…

MALICIOUS

PDF

45.8 KB Created: 2021-06-03 04:12:54 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-16
MD5: 688bcefe09aea3894ed50ad4ad25a744 SHA-1: 1ed44c1654b20ece560411258fa0ed2dc9165931 SHA-256: f28d7eb3dfb44ff222622a170e106de0805f1c1480f06a09045922354f16cab3
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The document contains a lure for game-related rewards, specifically mentioning 'Coin Master', and includes a direct link to a potentially malicious URL. The heuristic 'SE_SECRET_RECOVERY_LURE' suggests the document may also attempt to phish for sensitive information like passwords or private keys. The ML classifier strongly flagged this PDF as malicious, indicating a high probability of malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

Heuristics 4

  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.online/app/406889139/coin-master-facebook-page-game-hack PDF link annotation
    • https://www.studio-dentistico-fiume.com/files/tiktok-free-apk-download_GM835599320.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-robux-groups-2021_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/roblox-free-executor_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-daily-link-updated_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-play-minecraft-for-free-on-computer_GM479516143.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-hack-version-2021-download_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-roblox-accounts-with-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/http-coin-master-hack-club_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/play-coin-master-for-free_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/haktuts-coin-master-free-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/tiktok-hearts-free-2021_GM835599320.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-spins-link-blogspot_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/robux-generator-no-verification-needed_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/how-to-get-stuff-that-cost-coins-free-mcpe-master_GM406889139.pdfIn PDF document text
    • https://www.studio-dentistico-fiume.com/files/coin-master-free-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/free-draw-2-roblox_GM431946152.pdfIn PDF document text
    • http://studio-dentistico-fiume.com/files/coin-master-free_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 7

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
stream_004_off000054bc.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x54BC 26172 bytes
SHA-256: b13c8f34905b836616ec709c521de0ddc90ad6197179338c79bb535755f41bac
font_01_sfnt_off00009017.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9017 18480 bytes
SHA-256: c2031f29028d316a525723dce25d37222f39d47c7f71c2e87d16e38bd1d84d97

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