Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c2ae269d97c9bdd…

MALICIOUS

PDF

45.7 KB Created: 2021-05-14 14:31:49 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-31
MD5: 34bbaaf053b7a16420248e4b889a1f3d SHA-1: 504be972427b13aac7651803856f0c80c93cccb4 SHA-256: 2c2ae269d97c9bdd56f65a2e0e74f613e7fa856a5bca19bd65c8fffd54945df2
200 Risk Score

Malware Insights

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

The PDF document contains multiple links to malicious redirectors, disguised as "free rewards" or "game hacks" to trick users into clicking. The presence of a fake CAPTCHA heuristic further supports the social engineering aspect of this lure. The document's content and embedded links suggest it is designed to lead users to potentially malicious websites, likely for further exploitation or malware delivery.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9507

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/406889139/free-rewards-coin-master-game-hack In PDF document text
    • http://seniornetwanganui.org.nz/images/windows-10-minecraft-hacks_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-cards_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-rewards-free-spins_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-live_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/roblox-cheat-codes_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-get-free-robux-hack-2021_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/how-to-get-free-pet-food-on-coin-master_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-spins-8-14-2021_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/best-free-hacked-client_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/roblox-free-robux-no-human-verification_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/minecraft-free-install_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-robux-that-actually-works-2021_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/robux-free-2021_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-free-spin-today_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-apk-no-fb-login_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-minecraft-for-kids_GM479516143.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/como-hackear-coin-master-en-espaol_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/coin-master-hack-version-download_GM406889139.pdfIn PDF document text
    • http://seniornetwanganui.org.nz/images/free-spins-coin-master-2021-hack_GM406889139.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_003_off00004b6a.bin decompressed-pdf-stream PDF FlateDecoded stream at offset 0x4B6A 25316 bytes
SHA-256: 54b33c1949323d211a202c726a332a5cbb3912e09d61056ef91e51cee0e7c1a0
font_01_sfnt_off0000868c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x868C 2924 bytes
SHA-256: 89b375b3099c16285f8fe3c63d3b9e52cb99b52dd2caab822764707661633145
font_02_sfnt_off0000909f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x909F 18048 bytes
SHA-256: d52e1ade79c91b20aaae42cc68d8a6fc3da24a75956dc290bca91eb62f279afe

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