Malicious PDF — malware analysis report

Static analysis result for SHA-256 a498db1e40fcb734…

MALICIOUS

PDF

43.8 KB Created: 2021-05-13 22:32:43 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 3d8db5df45b8871ea169df91a2576be6 SHA-1: 51ee538749468ef9b7b7185724b0ffc82d62f80b SHA-256: a498db1e40fcb734cae05094425a731e1d30432ab3a5fb442627ff6ca3c0a33b
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a high-severity heuristic firing for a game hack redirect lure, pointing to a suspicious URL. The document body, though partially corrupted, also contains references to game hacks and a URL. The presence of embedded URLs and the nature of the lure suggest an attempt to trick users into visiting malicious sites, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9969

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 https://netcdn.xyz/app/406889139/coin-master-free-coins-and-spins-link-today-game-hack PDF link annotation
    • https://financia-business-school.com/static/upload/files/free-spins-and-coins-for-coin-master_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-roblox-accounts-with-robux-that-work-not-banned_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-make-free-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-free-download_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-hack-apk_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-hack-peoples-roblox-accounts_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-hack-in-roblox-prison-life_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-spins-link-2021-ios_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/roblox-bux-free_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/get-free-robux-without-human-verification_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-get-free-robux-without-offers_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/how-to-hack-roblox-to-get-robux_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/giftrobux-com-generator_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-google-play-promo-codes-coin-master_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-generator-no-survey-no-download-no-human-verification_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-app-hack_GM406889139.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/free-robux-quiz_GM431946152.pdfIn PDF document text
    • https://financia-business-school.com/static/upload/files/coin-master-hack-spin-generator-tool_GM406889139.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_003_off00004ebd.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4EBD 25428 bytes
SHA-256: ee8555564c38596803c2d0a1c2eaf944c3b3e6ff1c1dc5738e5fc9ab91fc4d93
font_01_sfnt_off00008878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8878 18412 bytes
SHA-256: 33825415dca9230cb3646c42e74ea5f1b776d8c47be8f6fdd7469cc236cf4eb1

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