Malicious PDF — malware analysis report

Static analysis result for SHA-256 d714fd9e2dffa03d…

MALICIOUS

PDF

42.9 KB Created: 2021-05-16 02:08:42 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 93730e2c74c25a1a3000816bc5e643f2 SHA-1: 8c21dc51c743b3a2cde0956f20df0f9b32b3a83b SHA-256: d714fd9e2dffa03df80e54678aca6e238769371d35d780718123619919a3abef
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 0.9971

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/431946152/rbx-robux-game-hack PDF link annotation
    • https://ethraa-sys.com/userfiles/files/free-roblox-card_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-net-download-free_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/claim-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/robuxfree-con_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-websites-that-actually-work_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-com_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spin-and-coins-links-2021_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-hack-activegamer_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/get-free-spins-coin-master-link_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-spin-link-today-free_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-coins-on-coin-master-without-verification_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-spins-instagram_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/minecraft-the-complete-handbook-collection_GM479516143.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/coin-master-free-100-spin-link_GM406889139.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/how-do-u-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://ethraa-sys.com/userfiles/files/cool-free-roblox-outfits_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_003_off0000495f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x495F 26352 bytes
SHA-256: 5275ed0473715d2fc1840872957c0f90a6e600548a7470720abb4d2b3e69dd0e
font_01_sfnt_off00008692.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8692 17852 bytes
SHA-256: db335316de1c827679f476dd5ee7b92397be9666285fe33d80a402a572565b32

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