Malicious PDF — malware analysis report

Static analysis result for SHA-256 df74e7a61e380787…

MALICIOUS

PDF

40.2 KB Created: 2021-04-23 12:54:56 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-23
MD5: c920a081be5d1ecb57205ee498151e0a SHA-1: a4a6cd2a07c97dff30b8f95ec9030b73f376a57b SHA-256: df74e7a61e380787e108f744018193e304f9f7fd298a2d024dec63bb20b5eb64
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 0.9941

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://netsecure.top/app/431946152/roblox-robux-for-free-2021-game-hack PDF link annotation
    • https://sparkthis.org/ckfinder/userfiles/files/free-roblox-account-getter-v3million.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/how-to-hack-roblox-ban-accounts.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/hacker-shirt-for-free-roblox.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/how-to-hack-on-roblox-apocalypse-rising-2021-august.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/roblox-farming-simulator-cheats.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/roblox-highschool-cheats.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/all-free-in-catalog-roblox.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/robux-hack-download-app.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/hack-de-robux-2021-funcionando.pdfIn PDF document text
    • https://sparkthis.org/ckfinder/userfiles/files/free-robux-does-not-work.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_off00003f39.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3F39 26044 bytes
SHA-256: 61a931902c6c2a939f012d4babaf046d79acf6312bea4ea741f763b99bb17ea0
font_01_sfnt_off00007aa9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA9 18488 bytes
SHA-256: f9a1e5364e694194e50cca1f381ee842257277bd9571b2face9b7725ebbf062f

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