Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9c04eadb8b6069e…

MALICIOUS

PDF

41.3 KB Created: 2021-04-26 05:07:23 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: 66442ba358defe26542fa9a58f6fa153 SHA-1: f09bddb0c1bac250b58ca9cc6064509372910c1d SHA-256: f9c04eadb8b6069ed165255cca52b953d93350baeec1a542fa7e7233fe9ebbd7
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded URLs and a document body that lures users with game hack content. The primary URL, https://netcdn.xyz/app/431946152/roblox-booga-booga-cheats-game-hack, is directly linked to a 'free generator / game hack' lure. Numerous other PDF files hosted on sitecontabil.com.br are also referenced, suggesting a campaign distributing malicious links under the guise of game cheats. The ML classifier also strongly indicated maliciousness.

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://netcdn.xyz/app/431946152/roblox-booga-booga-cheats-game-hack PDF link annotation
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-roblox-thumbnails.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/free-pet-adopt-me-roblox-code.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-hack-roblox-2021-september.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-do-you-get-free-robux-on-roblox-android.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/roblox-hack-mad-city-guns.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/claim-free-robux-2021.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-get-free-robux-in-jail-breck.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/how-to-hack-roblox-on-ipad-2021.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/commands-for-free-admin-roblox.pdfIn PDF document text
    • https://sitecontabil.com.br/ckfinder/userfiles/files/cool-free-roblox-skins.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_off000042aa.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x42AA 26716 bytes
SHA-256: 6566b1e7e1c969e78e273c44e6a26912d7b831946578b8bc8750490e63025f72
font_01_sfnt_off00007ef0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7EF0 18572 bytes
SHA-256: 9d7798e7538b54378d698f47817d2d887b12aef4d79b091316c9e76e1c986110

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