Malicious PDF — malware analysis report

Static analysis result for SHA-256 1be4d70547b71196…

MALICIOUS

PDF

34.6 KB Created: 2021-07-07 14:39:18 +07:00 Authoring application: wkhtmltopdf 0.12.6 (via Qt 4.8.7) First seen: 2021-09-13
MD5: 7d29e9aa97ea62d76303327fc556088b SHA-1: c86124e59b790e130df15698d2f6857d5eb64d9b SHA-256: 1be4d70547b711969a0ae8b8a4cfe0d1533faa072765f96d785b32d0d281d653
160 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains embedded links that are identified as malicious redirectors, specifically luring users with promises of 'free Robux' or game hacks. The primary malicious URL identified is http://netcdn.tw/app/431946152/free-robux-no-scam-game-hack, which is associated with known malicious redirector infrastructure. The document body and heuristics confirm the lure is related to obtaining free in-game currency or cheats, a common social engineering tactic.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9980

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.tw/app/431946152/free-robux-no-scam-game-hack In PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-robux-youtube-2021_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/make-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-can-i-get-free-spins-on-coin-master_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-vehicul-simulator-hacke_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/google-moon-active_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/roblox-hack-unlimited-robux-hack_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/bloxland-earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-daily-spins_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/earn-free-robux_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-mod-apk-unlimited-spin-download-free-full-version_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-2021-no-human-verification_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-get-free-stuff-in-the-roblox-catalog_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-no-verify_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/free-robux-no-generator_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/robux-hack_GM431946152.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-daily-free-cards_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/hack-coin-master-using-cheat-engine_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-free-spins-link-today-facebook_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/coin-master-heaven-free-spins-today_GM406889139.pdfIn PDF document text
    • https://www.cgalgeria-dubai.com/userfiles/files/how-to-customize-your-roblox-character-for-free_GM431946152.pdfIn PDF document text
    • http://en.wikipedia.org/wiki/MIT_LicenseIn PDF document text

Related samples 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000031aa.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31AA 22012 bytes
SHA-256: 74a3601f665576537cd06fb184fecb0de540f8d1d78b5de27437834f6df40e94
font_01_sfnt_off0000626f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x626F 18976 bytes
SHA-256: 23e221c5b5bcf2e3198359e0ed97b75398f02e20f829eab4584d68e40cba0ed0

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