Malicious PDF — malware analysis report

Static analysis result for SHA-256 4e927ef26e067b07…

MALICIOUS

PDF

50.1 KB Created: 2021-06-03 07:49:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: d4e59594455f6835e14ac503135c1160 SHA-1: 5759b99e33466526fc8d4d327fd19dbce1a40054 SHA-256: 4e927ef26e067b0708de7f8de3614850755ac973d684a85a38c58a91d78de9f0
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

This PDF document was flagged as malicious by an ML classifier. It uses brand-impersonation credential phishing. 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 0.9789

Heuristics 5

  • 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.
  • Brand-impersonation credential phishing lure high SE_BRAND_CREDENTIAL_PHISH
    Document impersonates a well-known consumer brand and uses account-security / verification language ('unusual activity', 'account on hold', 'verify your account') to steer the reader to a credential-harvesting link. Corroborated by: call-to-action link host does not match the impersonated brand: https://netcdn.online/app/431946152/how-to-get-roblox-toy-codes-for-free-game-hack.
  • 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/431946152/how-to-get-roblox-toy-codes-for-free-game-hack PDF link annotation
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-robux-scam_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-facebook_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/wurst-18-9_GM479516143.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-spins-coin-master-october-13-2021_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/pokemon-go-free-gucci_GM1094591345.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/how-can-i-get-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-gold-cards-hack_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/get-free-tiktok-fans_GM835599320.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-hack-pro_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/minecraft-apk-free-download-016-0_GM479516143.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/rbxfree-com-free-robux_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/free-tiktok-like_GM835599320.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-promo-code-2021_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-free-gift-links-2021_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-daily-bonus-hack_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/coin-master-mod_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/how-to-hack-coin-master-game-2021_GM406889139.pdfIn PDF document text
    • https://www.wetotravels.com/uploaded_files/userfiles/files/roblox-avatar-com_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
font_00_sfnt_off00005661.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5661 26428 bytes
SHA-256: 0790e4fac74d555c0731d6088ca55b4b435af9166267a49236830d4345eb3e33
font_01_sfnt_off00009323.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9323 5696 bytes
SHA-256: 450e3ee45915afe13702bf1d587eb8b9ad88a8d2113419ac9f2fd116a828e139
font_02_sfnt_off0000a034.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA034 18568 bytes
SHA-256: 44eb777af4089bc82c9e8571218961a445c51a4cd12e39b618f1584a19e8eec9

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