Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fd3827ad4bd188e…

MALICIOUS

PDF

33.5 KB Created: 2021-06-27 18:26:20 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-10-26
MD5: 705c6001c4b5fcdc59056c2f6a045436 SHA-1: aebea1086c055e1782016e34fd1bc99f69cd92df SHA-256: 7fd3827ad4bd188e8291802bce83226dd684ef118f651b5cbda89cba87056086
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF document contains multiple links to known malicious redirectors and lures users with promises of game hacks and free in-game currency. The primary redirector URL is http://netcdn.co/app/431946152/hacking-2-step-verification-for-roblox-game-hack, which likely leads to further malicious content or phishing pages. No scripts were extracted, but the embedded URLs and heuristic firings strongly indicate a social engineering attack aimed at tricking users into visiting malicious sites.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9824

Heuristics 4

  • 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.
  • 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.co/app/431946152/hacking-2-step-verification-for-roblox-game-hack In PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-spins-generator_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/play-full-version-of-minecraft-for-free-no-download_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-free-spin-ml_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/mistplay-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/master-free-spin-and-coin-links-html-m-1_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/daily-coin-master-free-spin-apk_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/coin-master-hack-spins-and-coins-unlimited-free_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/how-to-get-20210-robux-for-free_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-coin-master-glitches_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/minecraft-games-free-download_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/arsenal-roblox-hack-script-pastebin_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-gg-redeem-codes_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/to-get-free-robux_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/hacks-minecraft_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/spin-free-coin-master_GM406889139.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/minecraft-java-free-download_GM479516143.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-hack-no-human-verification-or-survey_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/free-robux-without-downloading-anything_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/mac-hacks-roblox-cheat-engine_GM431946152.pdfIn PDF document text
    • http://www.readandenjoy.ae/userfiles/files/can-i-play-roblox-for-free_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
font_00_sfnt_off00002b25.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2B25 22420 bytes
SHA-256: ab5c19dc1da78a9e2c13521ab0b4692e9f52cf9e1765f8d291be966eb8f9c250
font_01_sfnt_off00005cf5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5CF5 19480 bytes
SHA-256: f4daa30b5f1fec4ba3b3614804e34d9ff1de1ac92bdee4aafa488ccf4e3fb6a8

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