Malicious PDF — malware analysis report

Static analysis result for SHA-256 907b53a7fd4d96ef…

MALICIOUS

PDF

42.4 KB Created: 2021-05-12 07:00:07 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-21
MD5: 711a70c39489d71c432f58b2ed89be74 SHA-1: 432998be4db97a57e784084cb8db41235295e1d1 SHA-256: 907b53a7fd4d96efdd5d940fba98d7db22753025849eda939a8a9fc892c1cb95
200 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1203 Exploitation for Client Execution

The PDF document contains a fake CAPTCHA lure to trick users into clicking a malicious link. This link, 'https://netcdn.xyz/app/431946152/free-robux-by-watching-ads-game-hack', is associated with known malicious redirector infrastructure. The document's content and embedded URLs suggest a social engineering attempt to deliver a second-stage payload, likely related to game cheats or hacks.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9985

Heuristics 5

  • 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.
  • Fake CAPTCHA / human verification prompt high SE_FAKE_CAPTCHA
    Document displays a fake CAPTCHA or human-verification prompt — used to trick users into running commands or pressing keyboard shortcuts
  • 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/431946152/free-robux-by-watching-ads-game-hack In PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-speed-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/microsoft-roblox_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-time-hack-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-free-spins-cheat-deutsch_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coins-master-hacks_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/hack-coin-master-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/op-rewards-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/get-coin-master-cards-free_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-2021-free-spins_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-hack-roblox-accounts-2021-easy_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-hack-minecraft-pe_GM479516143.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/how-to-hack-coin-master-ios-2021_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-script-hacks_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/give-me-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/roblox-robux-hack_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/coin-master-free-spins-app_GM406889139.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/get-free-robux_GM431946152.pdfIn PDF document text
    • http://perpustakaan.uf.ac.id/opac/repository/reddit-coin-master-free-spins_GM406889139.pdfIn PDF document text
    • http://192.168.0.99/%20%3Cp%3E%3Cp%3ERoblox%20-%20Scripting%20and%20animating%20a%20punch%20ability!%20First%20get%20my%20punch%20tool%20in%20description%20second%20make%20a%20animation%20next%20set%20a%20Idle%20animation%20in%20you%20animation%20editer%20as%20a%20Idle%20next%20a%20...%3Cp%3E%3Cp%3Ehack%20para%20trials%20simon%20says%20roblox%3Cp%3E%3Cp%3Ehow%20to%20cheat%20is%20guess%20the%20song%20roblox%3Cp%3E%3Cp%3EGet%20a%20Free%20Hustle%20Hat%20at%20Roblox.com.%20Promo%20Code:%20StrikeAPose%20.%20To%20get%20a%20free%20hustle%20hat%20you%20have%20to%20enter%20the%20given%20code%20mentioned%20above.%204.%20Get%20a%20Free%20Speedy%20Shades%20Using%20Code%20.%20Promo%20Code:%20GetMoving%20.%20This%20is%20a%20new%20code%20for%20this%20month%20and%20it%20will%20provide%20you%20free%20speedy%20shades%20at%20Roblox.com.%205.%20Receive%20a%20Free%20Cardio%20Cans%20at%20Roblox.%20Promo%20Code%20...%3Cp%3E%3Cp%3Ecomo%20crear%20un%20hack%20para%20roblox%3Cp%3E%3Cp%3EJailbreak%20Release%20Free%20Vip%20Servers%20Roblox.%20Videos%20Matching%20Free%20Ro%20Ghoul%20Vip%20Server%20Expired%20Revolvy.%20Roblox%20Hack%20Tumblr.%20Vip%20Servers%20Zagonproxy%20Yt.%20Roblox%20Vip%20Server%20Cancel%20Buxgg%20Real.%20Free%20Fortnite%20Brickbattle%20Vip%20Serversconsole%20Roblox.%3Cp%3E%3Cp%3Eroblox%20commands%20hack%20november%202017%3Cp%3E%3Cp%3EAll%20Working%20Roblox%20Promo%20Codes%20For%20Robux%20Not%20Expired%202021%7C%20Redeem%201000%20Free%20Robux%20In%202021%20Roblox%20Redeem%20Codes%202021%20:%20WIKI%20/%20TWEET2MIL%20/%20Collectrobux%201600%20/%20232602620%20%7C%20Roblox%20is%20an%20international%20gaming%20platform,%20where%20there%20are%20more%20than%2050+%20million%20games%20for%20users%20to%20play%20anytime%20they%20want.%20Launched%20in%202006,%20by%E2%80%A6%20Continue%20reading%20TWEET2MIL!%20Roblox%20Promo%20Codes%20May%202021%20List%20For%20Robux%20!BIHOOD%202021%3Cp%3E%3Cp%3ERoblox%20Promo%20Codes%20or%20as%20some%20like%20to%20call%20it%20Free%20Robux%20Generator%20is%20an%20online%20based%20tool.%20It%20is%20designed%20In 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_off00004b0d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4B0D 23808 bytes
SHA-256: aadff76ab04ccbda1844071b9b7e72a084c25273b1857f306dbea346a7d11c37
font_01_sfnt_off00008112.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8112 19196 bytes
SHA-256: ec96cb65c8050d5d45d48b82ede94404bce16066ca502abf331556aefd900ff5

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