Malicious PDF — malware analysis report

Static analysis result for SHA-256 424ca856f8c02639…

MALICIOUS

PDF

34.6 KB Created: 2021-06-19 20:04:37 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-29
MD5: 9c440ffadbfc31e3ad7c0fc75ba6f1f8 SHA-1: 6284e52b6da753fb7b05619245c02b8a3fd373a6 SHA-256: 424ca856f8c02639a0f47d319eb6e5cf9e936a0e9de08cae69492bcd57a833ec
102 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and a lure related to game hacks and free in-game currency, indicating a social engineering tactic to redirect users to potentially malicious websites. The ML classifier strongly flagged this PDF as malicious, and the presence of external URIs and a specific game hack redirector lure supports this assessment. No scripts were extracted from this sample, but the embedded URLs are the primary indicators of malicious intent.

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.co/app/431946152/hban-hacks-in-roblox-game-hack PDF link annotation
    • http://103.40.122.33/akasia/repository/free-robux-generator-for-kids_GM431946152.pdfPDF link annotation
    • http://103.40.122.33/akasia/repository/how-to-get-a-free-robux-to-subscribe_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/on-roblox-adopt-me-how-do-u-hack-someones-pet_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/tiktok-free-ad-credit_GM835599320.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-stuff-obby_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/coin-master-free-spins-link-today-new-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-app_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/how-to-hack-and-get-free-robux_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-guaranteed_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-jailbreak-how-to-get-free-money-used-cheat-engine_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/minecraft-for-free-on-phone_GM479516143.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-that-actually-works_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/robux-and-tix-hack-no-download_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/roblox-free-robux-generator_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-back-accessories-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/checkmein-free-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-coin-master-spins-links-2021_GM406889139.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-robux-no-surveys-or-verification_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/free-t-shirt-deacls-roblox_GM431946152.pdfIn PDF document text
    • http://103.40.122.33/akasia/repository/comment-cheat-sur-le-jeux-jailbreak-roblox_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
font_00_sfnt_off000030fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30FC 22560 bytes
SHA-256: 86a71565b61d8febb1e79744ec5f5e3b0770fd12216756682d08496b22a778fb
font_01_sfnt_off00006333.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6333 18656 bytes
SHA-256: b283e170e43a92ab47b00d797497d6c10a3fc8f3d9227c86bad2a334fb1c4766

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