Malicious PDF — malware analysis report

Static analysis result for SHA-256 20d1de5bbf12a15a…

MALICIOUS

PDF

50.8 KB Created: 2021-06-03 07:03:05 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-07
MD5: 1ff4cf2440f74e38a30f4193e2bae88e SHA-1: f5702eabd8ece17eb8c86372d5a270aa013dd845 SHA-256: 20d1de5bbf12a15aa4a98420ecb2d1c50af1b64577a41ff1005e2dac8ae26fe0
200 Risk Score

Malware Insights

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

This PDF document employs a fake CAPTCHA lure to deceive users into clicking a link. The primary link, https://netcdn.online/app/431946152/roblox-apocalypse-rising-hack-game-hack, is identified as a malicious redirector. The document's structure and embedded links suggest an attempt to deliver a second-stage payload or lead the user to a phishing site, likely initiated via a spearphishing attachment.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9861

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.online/app/431946152/roblox-apocalypse-rising-hack-game-hack In PDF document text
    • http://opac.stiesa.ac.id/repository/pubg-uc-price_GM1330123889.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-likes-on-tiktok_GM835599320.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-roblox-animations_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-spins-and-coins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-cheats-2021_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/robux-generator-no-survey_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-hack-apk-35-11_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-com_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-link-today_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-pet-food_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/minecraft-redeem-code-free_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/coin-master-free-coins_GM406889139.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/games-that-give-free-robux_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-minecraft-codes_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-minecraft-bedrock-server_GM479516143.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/roblox-hacks-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-robux-no-scam_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-2021_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/free-robux-generator-no-human-verification-or-surveys_GM431946152.pdfIn PDF document text
    • http://opac.stiesa.ac.id/repository/how-to-get-free-clothes-on-roblox-2021_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
stream_004_off0000528f.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x528F 36780 bytes
SHA-256: 9e33f205e0b9521dfdd234f8729ef242394c672e6f93d348ff22e49328bf390f
font_01_sfnt_off0000a288.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA288 18948 bytes
SHA-256: c81671b47ab5e7fd402c3d16699df98b51b9b699798839031d1ff55305a8bd80

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