Malicious PDF — malware analysis report

Static analysis result for SHA-256 56445985c277443c…

MALICIOUS

PDF

40.4 KB Created: 2021-04-23 23:52:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-24
MD5: 8723f6ef379fb691e797c5daf841c426 SHA-1: 9807e7d3741d35b2a42bea6d5546a5f5beaf0482 SHA-256: 56445985c277443cdd99e8c9d1e032ebb8abc7c3df78808f1261bdf56547e7f9
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/get-free-robux-on-ipad-game-hack PDF link annotation
    • http://blueduna.com/images/roblox-free-avatar-editor.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-generator-google-chrome-plugin.pdfIn PDF document text
    • http://blueduna.com/images/roblox-dragon-adventures-cheats.pdfIn PDF document text
    • http://blueduna.com/images/free-roblox-accounts-with-robux-bugmenot.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-generator-really-works.pdfIn PDF document text
    • http://blueduna.com/images/comment-avoir-un-hacker-sur-jailbreak-roblox.pdfIn PDF document text
    • http://blueduna.com/images/free-robux-no-human-verification-and-no-offers.pdfIn PDF document text
    • http://blueduna.com/images/old-roblox-hack.pdfIn PDF document text
    • http://blueduna.com/images/how-to-get-free-robux-on-ipad-no-human-verification.pdfIn PDF document text
    • http://blueduna.com/images/get-100-free-robux-daily.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_off0000416d.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x416D 24744 bytes
SHA-256: 26eef93cd5a0d09e74d31cffb5195df4ec7ca1d9aa11ed0cd90cd1188c67b9ee
font_01_sfnt_off00007a9a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9A 18696 bytes
SHA-256: ce32fcd16d580a00f4168ecd327c29f64c0b08ae09330e4ee55e876e4073bb87

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