Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec438faabc93fa57…

MALICIOUS

PDF

37.3 KB Created: 2021-05-21 05:17:22 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-18
MD5: 05f8f7f652aeeb8d8b0875c36a051277 SHA-1: f4a27a45f13b5ee0ca8b978eda7572c67f75384c SHA-256: ec438faabc93fa57f76c9d452e4c3fe941888acac83e5285f020dded8510fad7
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 0.9447

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/how-to-get-free-robux-2021-easy-game-hack PDF link annotation
    • http://rgadventure.com/userfiles/files/how-to-get-free-robux-gift-cards_GM431946152.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-hack-account_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-hack-without-verification-code_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-instagram-free-spins_GM406889139.pdfIn PDF document text
    • http://rgadventure.com/userfiles/files/coin-master-free-spin-ml_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_off00003291.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3291 25484 bytes
SHA-256: 1c4eb734b1767d9a81ec481d12bfed9555c4161a135673f3027bb20e1447a708
font_01_sfnt_off00006db9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6DB9 19092 bytes
SHA-256: cc4041fc50bd2ea9a1268967e32916156e3a634973a216864dd7f220ceb04504

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