Malicious PDF — malware analysis report

Static analysis result for SHA-256 befa664d643683b6…

MALICIOUS

PDF

42.8 KB Created: 2021-05-24 00:48:34 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: d81b8cf257616b91decc764cbdfa1b22 SHA-1: 30a4cf2e6607322b33883ccef2ace52cf6a4a6a5 SHA-256: befa664d643683b6866d10991a1c87f40233270d703a5c0ae1f092f6bb1bc416
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains heuristics indicating it links to a 'free generator / game hack' redirector, specifically mentioning 'free Robux offers'. The document body, though partially garbled, also contains references to these lures and a URL. The embedded URLs suggest a phishing or scam attempt to trick users into visiting potentially malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.7947

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/free-robux-offers-game-hack PDF link annotation
    • https://javisintlmedia.com/images/how-to-download-minecraft-hacks_GM479516143.pdfIn PDF document text
    • https://javisintlmedia.com/images/synapse-roblox-free_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/robux-free-com_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://javisintlmedia.com/images/how-to-get-minecraft-for-free-ios_GM479516143.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_002_off00003298.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3298 25984 bytes
SHA-256: 5f0df9713700481d82832ebfa7621d4bde697800624f85b8162272dcf1af7d56
font_01_sfnt_off00006f83.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F83 2872 bytes
SHA-256: 5a38050e56bfed6ba013c4835499ae05f4b57b22e606c9172dd4bc2ae7fd1207
font_02_sfnt_off0000793a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x793A 5756 bytes
SHA-256: a7a69a356750c58f853193ac64834dcf3e4080fc2a8f6e9107645a696c81e11e
font_03_sfnt_off0000868b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868B 18012 bytes
SHA-256: 2fb616bca13af88ff89276a9b2d2fcc075dc4ebb9507e4cf45ab0719cef726f6

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