Malicious PDF — malware analysis report

Static analysis result for SHA-256 74493df466138531…

MALICIOUS

PDF

34.4 KB Created: 2021-06-30 10:25:09 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 5a00399d35dc257e409e2b22aa09faa4 SHA-1: 6b8e6acfb1dbaeb11d44b94fef8d5d1e2f9d4e73 SHA-256: 74493df4661385318829de0204bca9a3ae1f264ff6999f25cda135fbb43258fe
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links to a known malicious redirector infrastructure, specifically advertising 'free generators' and 'game hacks' for popular games like Roblox and Coin Master. The ML classifier also flagged this PDF as malicious. The embedded URLs and the heuristic firings strongly suggest a phishing or scam attempt designed to redirect users to potentially harmful content.

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.co/app/431946152/roblox-test-server-free-obc-game-hack In PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-spins-coins_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-very-easy_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-minecraft-java-account_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-free-redeem-code_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/ben-ten-roblox-game-online-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-daily-free-spins-link-today-blogspot_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/coin-master-hack-spins-free_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/robux-free-gift-card_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-hack-someones-account-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-to-get-free-roebucks-on-roblox_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-2021-robux-promo-code_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/how-do-you-get-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-without-verification_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-spins-and-coins-coin-master_GM406889139.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/buzz-roblox-free-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/free-robux-hacker-us_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/can-you-get-minecraft-for-free_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/roblox-hacks-hack-de-robux_GM431946152.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/minecraft-handbook_GM479516143.pdfIn PDF document text
    • http://www.my-travel.com.hk/upload/files/is-minecraft-free-on-switch_GM479516143.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_off00003018.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3018 22316 bytes
SHA-256: 9228b27a380a6db94f668f23b5bcf5d3c4ab2331c1d50772ecfe6689b5f3e0a6
font_01_sfnt_off000061dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61DD 18868 bytes
SHA-256: 7ab65a4c08d2bf18bdbe46bacf13a2718ab31cf19473599ee8a36d470acaf6f8