Malicious PDF — malware analysis report

Static analysis result for SHA-256 d2de078630107c83…

MALICIOUS

PDF

33.6 KB Created: 2021-07-08 13:52:45 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-01
MD5: 7b6d79b9a4ca948f2886bef89c259168 SHA-1: d24610811fb4eb72cca5dc75f6db4a46544446d8 SHA-256: d2de078630107c83747a8ae63abab1f1c41a1bbd62775d2e1b6746b92958f923
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 0.9980

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/431946152/robux-free-online-game-hack PDF link annotation
    • http://razredna-nastava.net/files/how-to-get-minecraft-for-free-on-android_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-minecraft-windows-10-with-java_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/demon-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-minecraft-realms-for-free_GM479516143.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-for-coin-master-hack_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/roblox-apocalypse-rising-hack-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/free-robux-download_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/admin-ofc-roblox-hack_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-robux-eith-no-verifications_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-do-you-earn-free-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-get-free-coins-on-tiktok_GM835599320.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-hack-peoples-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/links-for-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/free-spins-coin-master-links-twitter_GM406889139.pdfIn PDF document text
    • https://razredna-nastava.net/files/i-was-hacked-in-roblox_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/minecraft-java-for-free_GM479516143.pdfIn PDF document text
    • http://razredna-nastava.net/files/robux-matchcomfree-robux_GM431946152.pdfIn PDF document text
    • http://razredna-nastava.net/files/how-to-get-free-robux-without-paying-or-human-verification_GM431946152.pdfIn PDF document text
    • https://razredna-nastava.net/files/how-to-hack-roblox-for-robux-201_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_off00002e3b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2E3B 21904 bytes
SHA-256: 3cc83a45abff2aec1a39cd2a35c0576293e5e43c5b2b53512e72c3503dbd1805
font_01_sfnt_off00005e91.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E91 18912 bytes
SHA-256: ff36d619ce8e62cd296b26c96b34fbe88819c62effb096e20d6751b4628d3f13

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