Malicious PDF — malware analysis report

Static analysis result for SHA-256 af1d54debd6324e8…

MALICIOUS

PDF

42.3 KB Created: 2021-05-19 18:58:53 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 798a97098ca8592d94760d40829c2602 SHA-1: a1c2437b8576bdda11e1645c12a74e8ede291e25 SHA-256: af1d54debd6324e8b2ac836ab57bb96d5a7ea4f9a8b52f7862d6ed452cbd9ac5
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to websites offering game hacks and free currency, identified as malicious redirectors. The presence of a download button lure 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 URLs strongly suggest a phishing or malware distribution attempt.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

Heuristics 4

  • PDF links to a 'free generator / game hack' redirector critical 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. CRITICAL on its own: the /app/<id>/<slug>-game-hack path shape is unambiguous scam infra, and the host rotates so a host-list match can't be relied on.
  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • 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
  • 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/406889139/coin-master-offline-hack-game-hack In PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-robux-no-verification-no-download-2021_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/minecraft-fly-hack_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/hack-coin-master-online_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-spins-for-coin-master-app_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-coins-and-spins-hack_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-roblox-generator_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-robux-no-verification-needed_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-apk-hack-download_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-roblox-hack-us_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/do-you-get-minecraft-windows-10-for-free_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-free-minecraft-windows-10_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-link-2021-hack_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-free-spins-link-app-download_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/free-promo-codes-roblox_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/how-to-get-free-robux-no-human-verification-2021_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/get-free-food-in-coin-master_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/minecraft-hack-client-18-9_GM479516143.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/coin-master-mod-apk-free-download-for-android_GM406889139.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-executor-free_GM431946152.pdfIn PDF document text
    • https://www.bathshoponline.co.uk/uploads/files/files/roblox-robux-generator_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_003_off00004ca4.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4CA4 24500 bytes
SHA-256: 6a97520902ad34aae75572d52134c8bb921fad74a49ce48e39c6b2a59f501cd5
font_01_sfnt_off000084a0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84A0 17788 bytes
SHA-256: 87b766968f647688bf95ceda04f48a83a94c2d1e53f5f7acfdda8f1863e00cc5