Malicious PDF — malware analysis report

Static analysis result for SHA-256 db5b0260f6ee76e4…

MALICIOUS

PDF

35.1 KB Created: 2021-07-08 00:24:29 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-23
MD5: f14704efdbec0ef747edb16dd7bba7b3 SHA-1: fd6f0fb8662854cdfab4f21858de35a18137bcdd SHA-256: db5b0260f6ee76e4e6bfb859bb55ab33dd97ea02f7e58a7b81d337aae7815de3
200 Risk Score

Malware Insights

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

This PDF document employs a lure related to 'free Robux' and 'game hacks' to entice users. It displays a fake CAPTCHA, a common social engineering tactic to trick users into interacting with malicious content. The document contains numerous links, including a primary malicious redirector at http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack, which likely serves as a gateway to download further malicious payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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 http://netcdn.tw/app/431946152/free-robux-no-offers-game-hack In PDF document text
    • http://library.asih-husada.ac.id/repository/miss-play-com-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-exchange-40-free-spins_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-daily-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-hack-unlimited-spins-apk-download_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/play-robloxcom-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robux-hack-code-in-inspect-element_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-codes-june-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hacks-download-android_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-do-you-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-site_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/cupcake-roblox-exploit-knife-hack_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/free-robux-no-human-verification-or-survey-2021_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-50-spin-link_GM406889139.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/how-to-make-your-own-shirt-in-roblox-for-free_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-hack-easy-download_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-sword-hack-script_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/robuxkingz-ml-free-robux_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-bot-followers_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/roblox-free-game-no-download_GM431946152.pdfIn PDF document text
    • http://library.asih-husada.ac.id/repository/coin-master-links-2021_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_off0000328e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x328E 22544 bytes
SHA-256: 38dc9a49a5a81dd016604e893968b2e5f3a23167c5ac90e186a388a0e10b4a7a
font_01_sfnt_off0000651c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x651C 18716 bytes
SHA-256: 6cef72b87605a464df8901898d024a902d738decefc8e487a7362df6534fb924

Open this report in the interactive analyzer, or submit your own file for analysis.