Malicious PDF — malware analysis report

Static analysis result for SHA-256 531bb1a3151c7475…

MALICIOUS

PDF

34.2 KB Created: 2021-06-29 04:54:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 8faad65c896441eda31dbcfbb89549c2 SHA-1: 80fd4c1887411389fac843cd6c1f63532e06978a SHA-256: 531bb1a3151c7475cada8d8924f98cb61e501e0071e7c483189b6265ea5301ed
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.co/app/431946152/hack-para-roblox-hospital-roleplay-game-hack PDF link annotation
    • https://miraller.com/upload/files/como-hackear-coin-master_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-bloxburg-free_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/2021-roblox-free-accounts-facebook_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/character-hacks-for-robloxian-highschool-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-do-you-hack-on-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/can-i-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/free-minecraft-skins_GM479516143.pdfIn PDF document text
    • https://miraller.com/upload/files/coin-master-32-hack-apk_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/free-robux-promo-codes-december-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-hack-side_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/cyber-roblox-hacker_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-robux-fast-and-easy_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/gladiator-simulator-strength-hacks-roblox_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/hack-coin-master-apk-32_GM406889139.pdfIn PDF document text
    • https://miraller.com/upload/files/rbxoffers-com-free-robux_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-robux-without-verifying-2021_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/roblox-studio-free_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/how-to-get-free-stuff-in-roblox-mobile_GM431946152.pdfIn PDF document text
    • https://miraller.com/upload/files/tiktok-app-install-free-jio-phone_GM835599320.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_off00002ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2ECB 22056 bytes
SHA-256: 37d7bf598266c0c90e78b0dc12127591dad259a2e5224ad84e5e3d6658d327a3
font_01_sfnt_off00005f80.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F80 19388 bytes
SHA-256: 57250652865d68e23d95f73b33a215d2f670bd1136fbeef6ff8d95c0186bc111

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