Malicious PDF — malware analysis report

Static analysis result for SHA-256 97ef050e79bd684d…

MALICIOUS

PDF

32.8 KB Created: 2021-07-08 06:40:46 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: 0d72dcb9e23798ee3fdeccb8ccd34bab SHA-1: b93eddbda313a749a00dae238eff47f71c217ed4 SHA-256: 97ef050e79bd684d46f03d58b2dc0cb5972169f18cbf2c1722fc4c6435048886
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 0.9824

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 http://netcdn.tw/app/406889139/coin-master-free-cards-game-hack PDF link annotation
    • https://www.apartmani-mestrovic-krk.hr/files/get-free-roblox-hats_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-do-i-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/real-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/hack-for-pubg-uc_GM1330123889.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/how-to-get-free-things-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-spins-link-2021-no-verification-deutsch_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/earn-free-robux-on-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-followers-on-tiktok-no-human-verification_GM835599320.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/ways-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/free-coin-coin-master_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/blogspot-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/how-to-get-free-robux-instantly_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-gift-link-hack_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/coin-master-free-coins-link_GM406889139.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/best-free-buildings-in-roblox-studio_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/coin-master-free-spins-link-no-verification-2021_GM406889139.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/free-ss-executor-roblox_GM431946152.pdfIn PDF document text
    • http://apartmani-mestrovic-krk.hr/files/does-roblox-premium-expire_GM431946152.pdfIn PDF document text
    • https://www.apartmani-mestrovic-krk.hr/files/script-executor-roblox-free_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_001_off00002a19.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x2A19 23116 bytes
SHA-256: d4d736d4d10f4ad26daa088896b95d61063f25acde60290d1d3604a95eac0b70
font_01_sfnt_off00005dec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEC 18172 bytes
SHA-256: da47515c3b4c9ce74a6a7925be58a2cec6625ddcee19f7c3d533689243930cbf

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