Malicious PDF — malware analysis report

Static analysis result for SHA-256 bb8d3ac8bf967967…

MALICIOUS

PDF

35.3 KB Created: 2021-06-29 04:34:36 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-24
MD5: a8eaa4361e01d5f57b866bed823762c1 SHA-1: 399361e240adca68eed352e91cd7c54d67a341f7 SHA-256: bb8d3ac8bf967967c73079ded36355e7e046a74c9c9f2d6b5c712a66a04709c4
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document is designed as a lure, using the promise of 'Free Robux Codes' and 'game hacks' to entice users. It contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector at http://netcdn.co/app/431946152/free-robux-codes-unused-game-hack. The document body and heuristics confirm the deceptive nature, aiming to trick users into clicking malicious links, likely leading to further compromise.

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/free-robux-codes-unused-game-hack In PDF document text
    • http://library.fk.upnvj.ac.id/repository/i-didnt-get-my-free-spins-in-coin-master_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-ps4-code-free_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-promo-card-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-shaggy-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/hacker-usernames-for-roblox_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-into-someones-roblox-account_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-in-roblox-jailbreak-2021-mobile_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/clip60-upload-avxiy74olhs-get-free-pants-roblox-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-roblox-characters_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-bubble-chat-hack_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/camping-roblox-game-how-to-get-free-items_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-quick-robux_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/roblox-ninja-legends-free-vip-server-2021_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-on-tablet-easy_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/free-50-robux-gift-card-generator_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-hack-roblox-games_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/how-to-get-free-robux-website_GM431946152.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/minecraft-free-download-pc_GM479516143.pdfIn PDF document text
    • http://library.fk.upnvj.ac.id/repository/easiest-money-hack-february-roblox-rocitizens_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_off00003109.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3109 23052 bytes
SHA-256: 978c101db6c7672dd4870c1eda253a5a3bcba1880a8f13a860ce352367e7db47
font_01_sfnt_off00006544.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6544 18888 bytes
SHA-256: d93f1b6c7d5230d8b06872f2d2336b7476d1f60919a1e0008682759ceba19361

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