Malicious PDF — malware analysis report

Static analysis result for SHA-256 bae47b6d8a40df75…

MALICIOUS

PDF

35.7 KB Created: 2021-07-08 08:25:06 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: 26f56e12dd9719fa845988a15461f840 SHA-1: 78a30d77c807a4352eba7108c284949ba79b8ea4 SHA-256: bae47b6d8a40df7535ce34fb6f3e06f0f0a21d7b88f7e36ff177cac5c2e0f555
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF document contains multiple links to known malicious redirectors and websites offering 'free generators' or 'hacks' for popular games, indicating a phishing or scam attempt. The ML classifier also flagged this PDF as malicious. While no scripts were explicitly extracted, the presence of embedded URLs and the nature of the lures suggest an attempt to drive users to malicious sites, likely for credential harvesting or malware delivery.

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/406889139/coin-master-village-cost-game-hack In PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-use-scripts-in-roblox-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-phantom-forces-hack_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/tiktok-free-view-iphone-5c_GM835599320.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-without-human-verification-real_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-coin-master-game_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-claim-robux_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-hack-100-works-trackid-sp006_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robuxdill_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-gold-cards-on-coin-master-hack_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-obc-codes-roblox-unused_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-download-noclip-roblox_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-tickets_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-kid-friendly-no-human-verification_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://library.acehresearch.org/repository/free-robux-gift-card-codes-2021_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/how-to-get-free-robux-for-free_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/minecraft-hack-2021_GM479516143.pdfIn PDF document text
    • http://library.acehresearch.org/repository/roblox-cheat-engine-66-bypass_GM431946152.pdfIn PDF document text
    • http://library.acehresearch.org/repository/terminal-railways-have-a-train-free-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_off00003558.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3558 23144 bytes
SHA-256: 9943f68d5c9e12c0e341274174ff29cca1218e9244ccb6907bf0ca9b68aded52
font_01_sfnt_off00006978.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6978 18044 bytes
SHA-256: b488c7aa93a7282600252f1c18b160acf3bdf236873997f00b2a69c8057441f1

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