Malicious PDF — malware analysis report

Static analysis result for SHA-256 92c0cd0336c8ecc9…

MALICIOUS

PDF

35.8 KB Created: 2021-05-25 07:01:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-02
MD5: f2a7048523053cfd72c0f7a096f1820d SHA-1: e17e91c64c40c714ba00455cf15a869ea8a2e202 SHA-256: 92c0cd0336c8ecc994cdcdcadc570dbabc510a58c20b3e34688d8d41bdbc82e0
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 0.9492

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/479516143/minecraft-login-free-game-hack PDF link annotation
    • http://kontaktadig.se/images/rewards-roblox-com_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/roblox-promo-code-to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/huskybuckscom-free-robux_GM431946152.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-free-spins-daily_GM406889139.pdfIn PDF document text
    • http://kontaktadig.se/images/coin-master-daily-free-spins-link-app_GM406889139.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_off0000324e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x324E 25360 bytes
SHA-256: 505baf8efcce7c4bf934bc9fb654fa459faa0303d8f40d57bdc8c4484b096cf9
font_01_sfnt_off00006b52.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B52 17996 bytes
SHA-256: a07e2ad8fd79bb30e6fc1ebe6b3b8a9b32aa8410594bf0891ac0147b7718a067

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