Malicious PDF — malware analysis report

Static analysis result for SHA-256 c19fd0f4aca70a03…

MALICIOUS

PDF

35.4 KB Created: 2021-05-23 07:43:00 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-25
MD5: 3a87e6d9d9e3d0c00e28b296735be7f8 SHA-1: e7753b038586b4c7bcb65b572c223393e2c75a20 SHA-256: c19fd0f4aca70a038d09e02affc4891adbef752ec122507ca8d656448da5619b
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 0.9648

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/835599320/tiktok-views-free-game-hack PDF link annotation
    • http://extremeselfprotection.com/images/minecraft-windows-10-hack-client-2021_GM479516143.pdfIn PDF document text
    • http://extremeselfprotection.com/images/how-to-get-free-followers-on-tiktok_GM835599320.pdfIn PDF document text
    • http://extremeselfprotection.com/images/how-to-get-hacks-on-roblox_GM431946152.pdfIn PDF document text
    • http://extremeselfprotection.com/images/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://extremeselfprotection.com/images/free-tiktok-fans-no-verification_GM835599320.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_002_off00003237.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3237 24364 bytes
SHA-256: 8f5e08387caea3ae1574b2268bd610509af10a716978c108e794efc2963d68c0
font_01_sfnt_off00006a6c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6A6C 17752 bytes
SHA-256: ed90b125ba9f9ca56523df41571dae51d579609882fb5a6f38a0996a644814a5

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