Malicious PDF — malware analysis report

Static analysis result for SHA-256 b37037c70dbdd955…

MALICIOUS

PDF

41.1 KB Created: 2021-04-26 02:10:33 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 63643bba05a067c198ea7bb5610ed54b SHA-1: a11c9e0fccc60f150cee63028e7cf19959a0bcec SHA-256: b37037c70dbdd955069c55b6a7dc11f2203c3bfaf5cf33a3d8fe7298541d4cb2
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple heuristics indicating a lure for game hacks, specifically targeting Roblox. The primary URL, 'https://netcdn.xyz/app/431946152/roblox-hack-robux-com-game-hack', is presented as a 'free generator / game hack'. While no scripts were explicitly extracted, the PDF structure and embedded URLs suggest an attempt to redirect the user to a malicious site, likely for credential harvesting or malware distribution. The ML classifier also strongly flagged this PDF as malicious.

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-hack-robux-com-game-hack PDF link annotation
    • http://www.drent.se/images/roblox-free-items-glitch-2021.pdfIn PDF document text
    • http://www.drent.se/images/robux-hack-exe.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-paste.pdfIn PDF document text
    • http://www.drent.se/images/quick-robux-hacks.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-without-veriufication-new.pdfIn PDF document text
    • http://www.drent.se/images/cheat-the-plaza-roblox.pdfIn PDF document text
    • http://www.drent.se/images/mad-shitter-roblox-hack.pdfIn PDF document text
    • http://www.drent.se/images/how-to-get-free-money-in-roblox-lumber-tycoon-2.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-codes-for-phone.pdfIn PDF document text
    • http://www.drent.se/images/free-robux-and-bc-generator.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_off00004036.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4036 26864 bytes
SHA-256: cd040f94b6516ae373f58c9a7c952871750a4024015072036f22f8f4766169f4
font_01_sfnt_off00007e0e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E0E 18584 bytes
SHA-256: eee46ba687fb09ed5a390279809f8789643d1bc8d9fb675e322066fadfa76014

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