Malicious PDF — malware analysis report

Static analysis result for SHA-256 6f90647b2c5777d0…

MALICIOUS

PDF

47.0 KB Created: 2021-06-08 20:27:13 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: db50149203639a5139f7fb45775aae40 SHA-1: fb526bc24f5f926ea99461a53b30b38938318bc3 SHA-256: 6f90647b2c5777d051cbf22aa6d9cd5418b032c4117fe7a3a3c78cd16b908014
122 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

This PDF document employs a game hack lure to entice users to click on external links. The document body and heuristics indicate a redirection to URLs that offer 'premium software' or 'game hacks', suggesting a phishing or malware distribution attempt. The presence of multiple related URLs reinforces the malicious intent.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9769

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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.tw/app/431946152/premium-software-roblox-hack-game-hack PDF link annotation
    • http://lamascheradiferro.dk/images/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/minecraft-server-hacks_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-host-a-minecraft-server-for-free_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robux-codes_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-1-million-robux-for-free-2021_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-free-minecraft-coins_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/get-free-coins-on-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/can-i-play-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-daily-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/coin-master-freebies-2021_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/robuxmatchcon_GM431946152.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-rare-cards-for-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/www-coin-master-hack-tk_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/new-free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://lamascheradiferro.dk/images/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.semrush.com/prices/In 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_004_off00005007.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x5007 24768 bytes
SHA-256: 32599e87c4dedf2b622ef7ac6895dc5d8d1b46b59903db23fa06ce903745380f
font_01_sfnt_off0000889a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x889A 2844 bytes
SHA-256: baad2f3f6808f4af03fa9398e38c580c8d846f7f773a947d8cc1f39b2753d31a
font_02_sfnt_off0000925c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x925C 19124 bytes
SHA-256: a0cc72150a56679747cdb579aaf708059fb27b8045ddc5f1d7de609face11d84

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