Malicious PDF — malware analysis report

Static analysis result for SHA-256 768bf46c46dbfc56…

MALICIOUS

PDF

46.1 KB Created: 2021-06-09 04:58:58 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-17
MD5: 3eb8bad817f7c8152f02353d841bba8c SHA-1: 4ddda015f25063b5ce968f24b4b7dcbd86656613 SHA-256: 768bf46c46dbfc56e2fe99a7dd2e887aa503acee0b3ba9ca0c96df8ee9fcce34
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document employs a common lure of 'free Robux' or game hacks to entice users. It contains multiple embedded URLs pointing to external sites, which are likely designed to host phishing pages or download further malicious payloads. The ML classifier strongly indicated maliciousness, and the PDF_GAME_HACK_REDIRECT_LURE heuristic confirms the deceptive nature of the links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9864

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.tw/app/431946152/free-robux-cards-2021-march-game-hack PDF link annotation
    • http://dana1157.com/images/free-robux-no-download_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-coin-master-spins-daily_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-roblox-clothes-and-hair_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/how-to-get-free-robux-with-no-verification_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-free-gold-cards-link-2021_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-to-sue-roblox_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/appsmob-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/how-do-you-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/free-tiktok-25-likes_GM835599320.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-please_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/robuxy-com-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/earn-robux-sites_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-apk-android_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-coin-master-coins-and-spins_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-hack-100-working_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/free-robux-without-doing-anything_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/coin-master-mod-apk-latest-hack-with-unlimited-free-spins_GM406889139.pdfIn PDF document text
    • http://dana1157.com/images/rbxoffers-earn-free-robux_GM431946152.pdfIn PDF document text
    • http://dana1157.com/images/minecraft-free-download-windows_GM479516143.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_004_off0000509a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x509A 26828 bytes
SHA-256: ded69e641f4c09b1d7c079ae2a40c539d157d378b768601203457ff5912d129b
font_01_sfnt_off00008f07.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F07 19180 bytes
SHA-256: c7d9038dceb097213d25f9a422655c629819bf928b4cd756ba7b6698d09d0a32

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