Malicious PDF — malware analysis report

Static analysis result for SHA-256 97564b3dda469ca4…

MALICIOUS

PDF

36.1 KB Created: 2021-06-27 12:49:16 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-05
MD5: f500c7d0b634f687b53e3269a75cc771 SHA-1: 2f54705ebab8cfcc151550973afb38ddeac93ebf SHA-256: 97564b3dda469ca429f4c8c238fc02a170f20f44cf6f71b207146d53d6698b07
82 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links and embedded URIs pointing to websites offering game hacks and free currency, a common lure for phishing or malware distribution. The ML classifier strongly indicated maliciousness, and the presence of these lures aligns with social engineering tactics. No scripts were extracted, but the document's structure and content strongly suggest it's a malicious lure document.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.co/app/431946152/como-tener-tener-hacks-en-roblox-game-hack PDF link annotation
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-free-robux-2021_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/uprobuxcom-free-robux_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/roblox-hack-generator_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-sites-2021_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/feb-23-2021-free-coin-master-spins_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-minecraft-shaders_GM479516143.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-free-spins-1701-20_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-hack-version-2021-free-download_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-gameplay_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/great-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-hack-someone-on-roblox_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-free-coins-2021_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/how-to-get-free-robux-without-paying_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/roblox-hack-free-2021_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/robux-generators-that-actually-work_GM431946152.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • https://www.medlinerecruitment.com/uploaded_files/userfiles/files/buy-robux-free_GM431946152.pdfIn PDF document text
    • https://www.roblox.com/.IIn 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_off000036ef.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x36EF 22312 bytes
SHA-256: 8cbd5cfdc826476d752cd0abe30a627377a74961127b8fbc973ab8ef0ce89e26
font_01_sfnt_off00006874.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6874 18916 bytes
SHA-256: f4aca776a6c2fb34878bb7eaba2af542a4ebbb8d8b21fd0d0bd526606acd1a67

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