Malicious PDF — malware analysis report

Static analysis result for SHA-256 432c8b5498eb82af…

MALICIOUS

PDF

42.3 KB Created: 2021-05-13 09:19:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 6ca92bb7e080b41ee9aa06b5563b6047 SHA-1: 4eceed8c13f4ed3c980d1ae310173fcb9212ce22 SHA-256: 432c8b5498eb82af6510523594f9df10ae33ffb74c8f4ed14a68a3bb875452cb
142 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 a seed-phrase/secret-recovery lure. 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 5

  • 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.
  • 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/406889139/coin-master-ios-hack-download-game-hack PDF link annotation
    • http://www.mosaikshop.at/images/is-minecraft-free-on-nintendo-switch_GM479516143.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-free-robux-hack_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-fire-coin-master_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/windows-10-minecraft-free-with-java_GM479516143.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-coins-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-hack-game_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-hack-app_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-hack-app-2021-download_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-com-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-generator-without-human-verification_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/roblox-tracker_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-master-free-spins-2021-no-human-verification_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/grabpoints-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-spins-and-coins-coin-master-link-2021_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/grab-points-login_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/how-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://www.mosaikshop.at/images/coin-blogspot_GM406889139.pdfIn PDF document text
    • http://www.mosaikshop.at/images/free-robux-generator-2021-no-human-verification_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_off000047ea.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x47EA 25492 bytes
SHA-256: 2aeac14aff1740c8f6287dd1965de96510b458b47ee6b5de5e914177b0527303
font_01_sfnt_off000082eb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x82EB 18296 bytes
SHA-256: 3a29b4d49c4689b3fed86d6dd7d7394cd0d46f52f4bf8aca92fb45191e1be305

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