Malicious PDF — malware analysis report

Static analysis result for SHA-256 b280da042164c85d…

MALICIOUS

PDF

42.9 KB Created: 2021-05-17 06:34:31 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 0a757dff2f55fe898c29fe9126ac5f02 SHA-1: 8c6faa22ed4fc748c69b01c8c1e78cdaef131dfc SHA-256: b280da042164c85d265eb0d44c5205318e74f9edb5a581cff69d346fa1a4a709
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains a lure for 'free Robux rewards' and game hacks, directing users to a malicious URL. The presence of embedded URLs and the ML classifier's high confidence score indicate a malicious intent to redirect users to potentially harmful content. No scripts were extracted, but the document's structure and embedded links strongly suggest a phishing or scam attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-rewards-game-hack PDF link annotation
    • http://farwesterndistrict.org/images/coin-master-free-spins-hack-without-human-verification_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-free-blogspot_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/roblox36com-free-robux_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-hack-mod-apk_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/how-to-hack-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-robux-hack-no-human-verification_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-robux-codes-not-used_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/promo-codes-for-free-robux_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/hack-coin-master-using-pc_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-hack-2021-apk-download_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-free-spins-link-today-hack_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/minecraft-pe-apk-download_GM479516143.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-links-2021_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/mathep_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/how-to-get-free-hair-in-roblox_GM431946152.pdfIn PDF document text
    • http://farwesterndistrict.org/images/free-coin-master-stuff_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/cm-spin-link_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/download-minecraft-java-edition-free_GM479516143.pdfIn PDF document text
    • http://farwesterndistrict.org/images/how-to-get-free-spins-for-coin-master_GM406889139.pdfIn PDF document text
    • http://farwesterndistrict.org/images/coin-master-gold-cards-free-link_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_003_off00004aab.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4AAB 25324 bytes
SHA-256: 426a4bbb961af6806258afe625084cea2af9c3d9ee3e685bb7c2b09a1f128e4c
font_01_sfnt_off00008438.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8438 18580 bytes
SHA-256: f6e5d240c50f73aa936fa09c98082d3b637660329d811c3f0d463ac63f7ff7de

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