Malicious PDF — malware analysis report

Static analysis result for SHA-256 f27c76cf61651b95…

MALICIOUS

PDF

47.8 KB Created: 2021-04-28 21:51:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 333c3c28f5ef9ff98b8ca39f063c9da5 SHA-1: 2f9d013d199b9107a2259f939eed02e58dbe034b SHA-256: f27c76cf61651b95323919af455ff9b3268a5f628499267b45a628d112a7f82d
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free in-game currency, specifically for Roblox. The heuristic 'PDF_GAME_HACK_REDIRECT_LURE' and the embedded URLs strongly suggest a social engineering attempt to redirect users to potentially malicious sites. While no scripts were explicitly extracted, the PDF structure and embedded links indicate a malicious workflow, likely involving the download of further malicious content or redirection to phishing pages.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9764

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/le-hackean-jugando-a-roblox-game-hack PDF link annotation
    • https://guiasderonda.es/ckfinder/userfiles/files/how-to-hack-roblox-free-robux-no-download.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/notoriety-roblox-loot-bag-cheat.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/how-to-get-free-roblox-codes-for-robux-codes-2021.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/funny-roblox-outfits-and-free-outfits.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/programas-para-hackear-roblox.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/free-robux-february-2021.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/free-robux-no-survey-or-human-verification-2021.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/roblox-counter-blox-wall-hack-download.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/character-robux-hack-in-youtube.pdfIn PDF document text
    • https://guiasderonda.es/ckfinder/userfiles/files/roblox-best-hack-for-jailbreak.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004121.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4121 25648 bytes
SHA-256: dfc8156b1143188fb4dfc91ace72142b5b1c5688ffbd78b7bf0a2374772f5cff
font_01_sfnt_off00007bdc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7BDC 11440 bytes
SHA-256: 154d59d1680f2d1e38ccb783d6997f344290d121007e51df331726de4128c12e
font_02_sfnt_off000096fd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x96FD 18952 bytes
SHA-256: 8deabff1adf7595b4e27f0d9dfb5368f7a8f9007268d8112963532551ba02434