Malicious PDF — malware analysis report

Static analysis result for SHA-256 01a24f355ed2dbb4…

MALICIOUS

PDF

34.0 KB Created: 2021-07-08 14:56:52 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-25
MD5: e2febd7e618e681480852fdf20dc23bc SHA-1: 0f696f7738d926c81a0ea27ba5ce333159d00297 SHA-256: 01a24f355ed2dbb476cca4b71f09945b73e359d7f70f52207433dee88f0a7410
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple embedded URLs that point to a known malicious redirector infrastructure, disguised as game hacks and generators. The primary lure is "Hey Google How Do You Get Free Robux", which is designed to entice users to click the malicious links. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the document's structure and embedded URLs suggest it's part of a phishing or malware distribution chain.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/hey-google-how-do-you-get-free-robux-game-hack In PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-free-pets_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-interceptor-hack_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/roblox-card-hack_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-no-download-app-but-play-for-free_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-spins-coin-master-hack-2021_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-hack-call-meh-bob-roblox-youtubecom_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-codes_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-without-human-verification-ios_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-fb-free-spins-link_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-roblox-accounts-with-robux-that-work-2021_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-alternatives-to-roblox_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-pin-code-robux_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/free-ways-to-get-robux_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-get-free-admin-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/tiktok-followers-for-free_GM835599320.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/green-lego-cats-free-robux_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/how-to-spawn-in-working-gears-roblox-hack-script_GM431946152.pdfIn PDF document text
    • http://www.producthubhob.com/uploaded_files/userfiles/files/hack-coin-master-apk-33_GM406889139.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_off00002f0f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F0F 21472 bytes
SHA-256: e62a5cfec456545245a97efc245508d489c262232a4092ef30f2d8a806ca0123
font_01_sfnt_off00005e13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E13 19568 bytes
SHA-256: c947cb9e4153dfb2ea198cd701ec4d5f338e29feb7802fd2debd87897cec7901

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