Malicious PDF — malware analysis report

Static analysis result for SHA-256 052cf26c9fb2a561…

MALICIOUS

PDF

43.1 KB Created: 2021-05-14 11:25:57 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-11-24
MD5: 36e7f242a57ad1a4e4c014d19eea3949 SHA-1: 6d601efaa6b29c50e7b14020a628d75f88f65b5f SHA-256: 052cf26c9fb2a561f280ba5592edb5f9fe51a7787786eb43346a2e431c83f448
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 entice users into clicking malicious links, specifically targeting those seeking game hacks or free in-game currency. The embedded links redirect to known malicious infrastructure, suggesting an attempt to download further malicious content or exploit user interaction. The ML classifier strongly flagged this PDF as malicious, supporting the observed redirection and lure techniques.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9971

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-roblox-clothes-codes-game-hack In PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/minecraft-maps-pe-free-download_GM479516143.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-with-no-human-verification_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/what-games-on-roblox-give-you-free-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-daily-free-spins_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-money-and-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-hack-generator_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-free-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-free-spins-and-coins-link-haktuts_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-spins-hack_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-do-i-get-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-15-free-spin-link-of-last-5-days_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-spins-coin-master_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-fun-com-free-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/free-robux-generator-com-roblox-hack_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/get-free-robux-2021_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/roblox-hack-me-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/how-to-get-free-shields-on-coin-master_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-hack-without-verification-2021_GM406889139.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/blox-supply-free-robux_GM431946152.pdfIn PDF document text
    • http://miperwanida.me/__statics/gudangsoal/files/coin-master-hack-spins-apk_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
stream_003_off0000480e.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x480E 26248 bytes
SHA-256: 93173ce5561e5330b85fa084574ac1391768657d18d12103eba3c56a255647b9
font_01_sfnt_off0000859f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x859F 18392 bytes
SHA-256: 8f170c24a43a5cea343fe8e0c347968302273409877848d607eb86d714eb009a

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