Malicious PDF — malware analysis report

Static analysis result for SHA-256 5fdfee9bd5fd776e…

MALICIOUS

PDF

36.4 KB Created: 2021-07-03 14:00:19 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 0caa50e8100a58f2c99e2f1dd94087eb SHA-1: dc12fcba5cd86f9ecf8c7802ea269764679abf15 SHA-256: 5fdfee9bd5fd776e5f71640edc5b624bb531f2746c152c4069f7b46b558236b8
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains numerous links to websites offering game hacks and free in-game currency, such as 'coin-master-15-free-spin-link-of-last-5-days-game-hack'. The presence of a 'free generator / game hack' redirector heuristic and the ML classifier strongly indicate malicious intent. While no scripts were explicitly extracted, the document structure and embedded URLs suggest a phishing or malware distribution lure, likely intended to trick users into downloading further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

Heuristics 5

  • 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.
  • Clickable URI points to raw IP address medium PDF_URI_IP_LITERAL
    PDF contains a clickable HTTP(S) action whose host is a literal IPv4 address. Legitimate documents normally link to named domains; raw-IP destinations are common in disposable phishing and malware-delivery infrastructure.
  • 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 http://netcdn.tw/app/406889139/coin-master-15-free-spin-link-of-last-5-days-game-hack PDF link annotation
    • http://103.40.122.33/akasia/repository/are-roblox-hack-clients-real_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-hack-a-password-on-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-game-on-roblox-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-leaderboard-hack-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-building-hacks_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-free-gift_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-cards-for-100_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-roblox-games-without-signing-in_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/get-tiktok-followers-free_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/rs-hack-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-hacks-march-2021_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-tiktok-likes-no-human-verification-or-download_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-robux-hack-2021-no-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-test-roblox-shirts-for-free_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-get-free-robux-2021-easy_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-player-speed-hack-script_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-win-free-robux_GM431946152.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_off00003606.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x3606 22872 bytes
SHA-256: 25c42a314fd7a5cd09770d6dbff6c9a4131eea1713e2dce23c007c728e9e6da5
font_01_sfnt_off0000698e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x698E 18932 bytes
SHA-256: ab5bf67824d9f1de49592764067eca3c5a6c622e8f4c11d8ed5e999977e69fe8

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